2 * Copyright 2011 Christoph Bumiller
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
11 * The above copyright notice and this permission notice shall be included in
12 * all copies or substantial portions of the Software.
14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
17 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
20 * OTHER DEALINGS IN THE SOFTWARE.
23 #include "codegen/nv50_ir.h"
24 #include "codegen/nv50_ir_target.h"
25 #include "codegen/nv50_ir_build_util.h"
28 #include "util/u_math.h"
34 Instruction::isNop() const
36 if (op
== OP_PHI
|| op
== OP_SPLIT
|| op
== OP_MERGE
|| op
== OP_CONSTRAINT
)
38 if (terminator
|| join
) // XXX: should terminator imply flow ?
42 if (!fixed
&& op
== OP_NOP
)
45 if (defExists(0) && def(0).rep()->reg
.data
.id
< 0) {
46 for (int d
= 1; defExists(d
); ++d
)
47 if (def(d
).rep()->reg
.data
.id
>= 0)
48 WARN("part of vector result is unused !\n");
52 if (op
== OP_MOV
|| op
== OP_UNION
) {
53 if (!getDef(0)->equals(getSrc(0)))
56 if (!def(0).rep()->equals(getSrc(1)))
64 bool Instruction::isDead() const
69 op
== OP_SUSTB
|| op
== OP_SUSTP
|| op
== OP_SUREDP
|| op
== OP_SUREDB
||
73 for (int d
= 0; defExists(d
); ++d
)
74 if (getDef(d
)->refCount() || getDef(d
)->reg
.data
.id
>= 0)
77 if (terminator
|| asFlow())
85 // =============================================================================
87 class CopyPropagation
: public Pass
90 virtual bool visit(BasicBlock
*);
93 // Propagate all MOVs forward to make subsequent optimization easier, except if
94 // the sources stem from a phi, in which case we don't want to mess up potential
95 // swaps $rX <-> $rY, i.e. do not create live range overlaps of phi src and def.
97 CopyPropagation::visit(BasicBlock
*bb
)
99 Instruction
*mov
, *si
, *next
;
101 for (mov
= bb
->getEntry(); mov
; mov
= next
) {
103 if (mov
->op
!= OP_MOV
|| mov
->fixed
|| !mov
->getSrc(0)->asLValue())
105 if (mov
->getPredicate())
107 if (mov
->def(0).getFile() != mov
->src(0).getFile())
109 si
= mov
->getSrc(0)->getInsn();
110 if (mov
->getDef(0)->reg
.data
.id
< 0 && si
&& si
->op
!= OP_PHI
) {
112 mov
->def(0).replace(mov
->getSrc(0), false);
113 delete_Instruction(prog
, mov
);
119 // =============================================================================
121 class MergeSplits
: public Pass
124 virtual bool visit(BasicBlock
*);
127 // For SPLIT / MERGE pairs that operate on the same registers, replace the
128 // post-merge def with the SPLIT's source.
130 MergeSplits::visit(BasicBlock
*bb
)
132 Instruction
*i
, *next
, *si
;
134 for (i
= bb
->getEntry(); i
; i
= next
) {
136 if (i
->op
!= OP_MERGE
|| typeSizeof(i
->dType
) != 8)
138 si
= i
->getSrc(0)->getInsn();
139 if (si
->op
!= OP_SPLIT
|| si
!= i
->getSrc(1)->getInsn())
141 i
->def(0).replace(si
->getSrc(0), false);
142 delete_Instruction(prog
, i
);
148 // =============================================================================
150 class LoadPropagation
: public Pass
153 virtual bool visit(BasicBlock
*);
155 void checkSwapSrc01(Instruction
*);
157 bool isCSpaceLoad(Instruction
*);
158 bool isImmd32Load(Instruction
*);
159 bool isAttribOrSharedLoad(Instruction
*);
163 LoadPropagation::isCSpaceLoad(Instruction
*ld
)
165 return ld
&& ld
->op
== OP_LOAD
&& ld
->src(0).getFile() == FILE_MEMORY_CONST
;
169 LoadPropagation::isImmd32Load(Instruction
*ld
)
171 if (!ld
|| (ld
->op
!= OP_MOV
) || (typeSizeof(ld
->dType
) != 4))
173 return ld
->src(0).getFile() == FILE_IMMEDIATE
;
177 LoadPropagation::isAttribOrSharedLoad(Instruction
*ld
)
180 (ld
->op
== OP_VFETCH
||
181 (ld
->op
== OP_LOAD
&&
182 (ld
->src(0).getFile() == FILE_SHADER_INPUT
||
183 ld
->src(0).getFile() == FILE_MEMORY_SHARED
)));
187 LoadPropagation::checkSwapSrc01(Instruction
*insn
)
189 if (!prog
->getTarget()->getOpInfo(insn
).commutative
)
190 if (insn
->op
!= OP_SET
&& insn
->op
!= OP_SLCT
)
192 if (insn
->src(1).getFile() != FILE_GPR
)
195 Instruction
*i0
= insn
->getSrc(0)->getInsn();
196 Instruction
*i1
= insn
->getSrc(1)->getInsn();
198 if (isCSpaceLoad(i0
)) {
199 if (!isCSpaceLoad(i1
))
200 insn
->swapSources(0, 1);
204 if (isImmd32Load(i0
)) {
205 if (!isCSpaceLoad(i1
) && !isImmd32Load(i1
))
206 insn
->swapSources(0, 1);
210 if (isAttribOrSharedLoad(i1
)) {
211 if (!isAttribOrSharedLoad(i0
))
212 insn
->swapSources(0, 1);
219 if (insn
->op
== OP_SET
|| insn
->op
== OP_SET_AND
||
220 insn
->op
== OP_SET_OR
|| insn
->op
== OP_SET_XOR
)
221 insn
->asCmp()->setCond
= reverseCondCode(insn
->asCmp()->setCond
);
223 if (insn
->op
== OP_SLCT
)
224 insn
->asCmp()->setCond
= inverseCondCode(insn
->asCmp()->setCond
);
228 LoadPropagation::visit(BasicBlock
*bb
)
230 const Target
*targ
= prog
->getTarget();
233 for (Instruction
*i
= bb
->getEntry(); i
; i
= next
) {
236 if (i
->op
== OP_CALL
) // calls have args as sources, they must be in regs
239 if (i
->op
== OP_PFETCH
) // pfetch expects arg1 to be a reg
245 for (int s
= 0; i
->srcExists(s
); ++s
) {
246 Instruction
*ld
= i
->getSrc(s
)->getInsn();
248 if (!ld
|| ld
->fixed
|| (ld
->op
!= OP_LOAD
&& ld
->op
!= OP_MOV
))
250 if (!targ
->insnCanLoad(i
, s
, ld
))
254 i
->setSrc(s
, ld
->getSrc(0));
255 if (ld
->src(0).isIndirect(0))
256 i
->setIndirect(s
, 0, ld
->getIndirect(0, 0));
258 if (ld
->getDef(0)->refCount() == 0)
259 delete_Instruction(prog
, ld
);
265 // =============================================================================
267 // Evaluate constant expressions.
268 class ConstantFolding
: public Pass
271 bool foldAll(Program
*);
274 virtual bool visit(BasicBlock
*);
276 void expr(Instruction
*, ImmediateValue
&, ImmediateValue
&);
277 void expr(Instruction
*, ImmediateValue
&, ImmediateValue
&, ImmediateValue
&);
278 void opnd(Instruction
*, ImmediateValue
&, int s
);
280 void unary(Instruction
*, const ImmediateValue
&);
282 void tryCollapseChainedMULs(Instruction
*, const int s
, ImmediateValue
&);
284 CmpInstruction
*findOriginForTestWithZero(Value
*);
286 unsigned int foldCount
;
291 // TODO: remember generated immediates and only revisit these
293 ConstantFolding::foldAll(Program
*prog
)
295 unsigned int iterCount
= 0;
300 } while (foldCount
&& ++iterCount
< 2);
305 ConstantFolding::visit(BasicBlock
*bb
)
307 Instruction
*i
, *next
;
309 for (i
= bb
->getEntry(); i
; i
= next
) {
311 if (i
->op
== OP_MOV
|| i
->op
== OP_CALL
)
314 ImmediateValue src0
, src1
, src2
;
316 if (i
->srcExists(2) &&
317 i
->src(0).getImmediate(src0
) &&
318 i
->src(1).getImmediate(src1
) &&
319 i
->src(2).getImmediate(src2
))
320 expr(i
, src0
, src1
, src2
);
322 if (i
->srcExists(1) &&
323 i
->src(0).getImmediate(src0
) && i
->src(1).getImmediate(src1
))
326 if (i
->srcExists(0) && i
->src(0).getImmediate(src0
))
329 if (i
->srcExists(1) && i
->src(1).getImmediate(src1
))
336 ConstantFolding::findOriginForTestWithZero(Value
*value
)
340 Instruction
*insn
= value
->getInsn();
342 if (insn
->asCmp() && insn
->op
!= OP_SLCT
)
343 return insn
->asCmp();
345 /* Sometimes mov's will sneak in as a result of other folding. This gets
348 if (insn
->op
== OP_MOV
)
349 return findOriginForTestWithZero(insn
->getSrc(0));
351 /* Deal with AND 1.0 here since nv50 can't fold into boolean float */
352 if (insn
->op
== OP_AND
) {
355 if (!insn
->src(s
).getImmediate(imm
)) {
357 if (!insn
->src(s
).getImmediate(imm
))
360 if (imm
.reg
.data
.f32
!= 1.0f
)
362 /* TODO: Come up with a way to handle the condition being inverted */
363 if (insn
->src(!s
).mod
!= Modifier(0))
365 return findOriginForTestWithZero(insn
->getSrc(!s
));
372 Modifier::applyTo(ImmediateValue
& imm
) const
374 if (!bits
) // avoid failure if imm.reg.type is unhandled (e.g. b128)
376 switch (imm
.reg
.type
) {
378 if (bits
& NV50_IR_MOD_ABS
)
379 imm
.reg
.data
.f32
= fabsf(imm
.reg
.data
.f32
);
380 if (bits
& NV50_IR_MOD_NEG
)
381 imm
.reg
.data
.f32
= -imm
.reg
.data
.f32
;
382 if (bits
& NV50_IR_MOD_SAT
) {
383 if (imm
.reg
.data
.f32
< 0.0f
)
384 imm
.reg
.data
.f32
= 0.0f
;
386 if (imm
.reg
.data
.f32
> 1.0f
)
387 imm
.reg
.data
.f32
= 1.0f
;
389 assert(!(bits
& NV50_IR_MOD_NOT
));
392 case TYPE_S8
: // NOTE: will be extended
395 case TYPE_U8
: // NOTE: treated as signed
398 if (bits
& NV50_IR_MOD_ABS
)
399 imm
.reg
.data
.s32
= (imm
.reg
.data
.s32
>= 0) ?
400 imm
.reg
.data
.s32
: -imm
.reg
.data
.s32
;
401 if (bits
& NV50_IR_MOD_NEG
)
402 imm
.reg
.data
.s32
= -imm
.reg
.data
.s32
;
403 if (bits
& NV50_IR_MOD_NOT
)
404 imm
.reg
.data
.s32
= ~imm
.reg
.data
.s32
;
408 if (bits
& NV50_IR_MOD_ABS
)
409 imm
.reg
.data
.f64
= fabs(imm
.reg
.data
.f64
);
410 if (bits
& NV50_IR_MOD_NEG
)
411 imm
.reg
.data
.f64
= -imm
.reg
.data
.f64
;
412 if (bits
& NV50_IR_MOD_SAT
) {
413 if (imm
.reg
.data
.f64
< 0.0)
414 imm
.reg
.data
.f64
= 0.0;
416 if (imm
.reg
.data
.f64
> 1.0)
417 imm
.reg
.data
.f64
= 1.0;
419 assert(!(bits
& NV50_IR_MOD_NOT
));
423 assert(!"invalid/unhandled type");
424 imm
.reg
.data
.u64
= 0;
430 Modifier::getOp() const
433 case NV50_IR_MOD_ABS
: return OP_ABS
;
434 case NV50_IR_MOD_NEG
: return OP_NEG
;
435 case NV50_IR_MOD_SAT
: return OP_SAT
;
436 case NV50_IR_MOD_NOT
: return OP_NOT
;
445 ConstantFolding::expr(Instruction
*i
,
446 ImmediateValue
&imm0
, ImmediateValue
&imm1
)
448 struct Storage
*const a
= &imm0
.reg
, *const b
= &imm1
.reg
;
451 memset(&res
.data
, 0, sizeof(res
.data
));
457 if (i
->dnz
&& i
->dType
== TYPE_F32
) {
458 if (!isfinite(a
->data
.f32
))
460 if (!isfinite(b
->data
.f32
))
465 res
.data
.f32
= a
->data
.f32
* b
->data
.f32
* exp2f(i
->postFactor
);
467 case TYPE_F64
: res
.data
.f64
= a
->data
.f64
* b
->data
.f64
; break;
469 if (i
->subOp
== NV50_IR_SUBOP_MUL_HIGH
) {
470 res
.data
.s32
= ((int64_t)a
->data
.s32
* b
->data
.s32
) >> 32;
475 if (i
->subOp
== NV50_IR_SUBOP_MUL_HIGH
) {
476 res
.data
.u32
= ((uint64_t)a
->data
.u32
* b
->data
.u32
) >> 32;
479 res
.data
.u32
= a
->data
.u32
* b
->data
.u32
; break;
485 if (b
->data
.u32
== 0)
488 case TYPE_F32
: res
.data
.f32
= a
->data
.f32
/ b
->data
.f32
; break;
489 case TYPE_F64
: res
.data
.f64
= a
->data
.f64
/ b
->data
.f64
; break;
490 case TYPE_S32
: res
.data
.s32
= a
->data
.s32
/ b
->data
.s32
; break;
491 case TYPE_U32
: res
.data
.u32
= a
->data
.u32
/ b
->data
.u32
; break;
498 case TYPE_F32
: res
.data
.f32
= a
->data
.f32
+ b
->data
.f32
; break;
499 case TYPE_F64
: res
.data
.f64
= a
->data
.f64
+ b
->data
.f64
; break;
501 case TYPE_U32
: res
.data
.u32
= a
->data
.u32
+ b
->data
.u32
; break;
508 case TYPE_F32
: res
.data
.f32
= pow(a
->data
.f32
, b
->data
.f32
); break;
509 case TYPE_F64
: res
.data
.f64
= pow(a
->data
.f64
, b
->data
.f64
); break;
516 case TYPE_F32
: res
.data
.f32
= MAX2(a
->data
.f32
, b
->data
.f32
); break;
517 case TYPE_F64
: res
.data
.f64
= MAX2(a
->data
.f64
, b
->data
.f64
); break;
518 case TYPE_S32
: res
.data
.s32
= MAX2(a
->data
.s32
, b
->data
.s32
); break;
519 case TYPE_U32
: res
.data
.u32
= MAX2(a
->data
.u32
, b
->data
.u32
); break;
526 case TYPE_F32
: res
.data
.f32
= MIN2(a
->data
.f32
, b
->data
.f32
); break;
527 case TYPE_F64
: res
.data
.f64
= MIN2(a
->data
.f64
, b
->data
.f64
); break;
528 case TYPE_S32
: res
.data
.s32
= MIN2(a
->data
.s32
, b
->data
.s32
); break;
529 case TYPE_U32
: res
.data
.u32
= MIN2(a
->data
.u32
, b
->data
.u32
); break;
535 res
.data
.u64
= a
->data
.u64
& b
->data
.u64
;
538 res
.data
.u64
= a
->data
.u64
| b
->data
.u64
;
541 res
.data
.u64
= a
->data
.u64
^ b
->data
.u64
;
544 res
.data
.u32
= a
->data
.u32
<< b
->data
.u32
;
548 case TYPE_S32
: res
.data
.s32
= a
->data
.s32
>> b
->data
.u32
; break;
549 case TYPE_U32
: res
.data
.u32
= a
->data
.u32
>> b
->data
.u32
; break;
555 if (a
->data
.u32
!= b
->data
.u32
)
557 res
.data
.u32
= a
->data
.u32
;
560 int offset
= b
->data
.u32
& 0xff;
561 int width
= (b
->data
.u32
>> 8) & 0xff;
568 if (width
+ offset
< 32) {
570 lshift
= 32 - width
- offset
;
572 if (i
->subOp
== NV50_IR_SUBOP_EXTBF_REV
)
573 res
.data
.u32
= util_bitreverse(a
->data
.u32
);
575 res
.data
.u32
= a
->data
.u32
;
577 case TYPE_S32
: res
.data
.s32
= (res
.data
.s32
<< lshift
) >> rshift
; break;
578 case TYPE_U32
: res
.data
.u32
= (res
.data
.u32
<< lshift
) >> rshift
; break;
585 res
.data
.u32
= util_bitcount(a
->data
.u32
& b
->data
.u32
);
588 // The two arguments to pfetch are logically added together. Normally
589 // the second argument will not be constant, but that can happen.
590 res
.data
.u32
= a
->data
.u32
+ b
->data
.u32
;
597 i
->src(0).mod
= Modifier(0);
598 i
->src(1).mod
= Modifier(0);
601 i
->setSrc(0, new_ImmediateValue(i
->bb
->getProgram(), res
.data
.u32
));
604 i
->getSrc(0)->reg
.data
= res
.data
;
611 i
->setSrc(1, i
->getSrc(0));
612 i
->src(1).mod
= i
->src(2).mod
;
613 i
->setSrc(0, i
->getSrc(2));
617 if (i
->src(0).getImmediate(src0
))
618 expr(i
, src0
, *i
->getSrc(1)->asImm());
619 if (i
->saturate
&& !prog
->getTarget()->isSatSupported(i
)) {
620 bld
.setPosition(i
, false);
621 i
->setSrc(1, bld
.loadImm(NULL
, res
.data
.u32
));
626 // Leave PFETCH alone... we just folded its 2 args into 1.
629 i
->op
= i
->saturate
? OP_SAT
: OP_MOV
; /* SAT handled by unary() */
636 ConstantFolding::expr(Instruction
*i
,
637 ImmediateValue
&imm0
,
638 ImmediateValue
&imm1
,
639 ImmediateValue
&imm2
)
641 struct Storage
*const a
= &imm0
.reg
, *const b
= &imm1
.reg
, *const c
= &imm2
.reg
;
644 memset(&res
.data
, 0, sizeof(res
.data
));
648 int offset
= b
->data
.u32
& 0xff;
649 int width
= (b
->data
.u32
>> 8) & 0xff;
650 unsigned bitmask
= ((1 << width
) - 1) << offset
;
651 res
.data
.u32
= ((a
->data
.u32
<< offset
) & bitmask
) | (c
->data
.u32
& ~bitmask
);
659 i
->src(0).mod
= Modifier(0);
660 i
->src(1).mod
= Modifier(0);
661 i
->src(2).mod
= Modifier(0);
663 i
->setSrc(0, new_ImmediateValue(i
->bb
->getProgram(), res
.data
.u32
));
667 i
->getSrc(0)->reg
.data
= res
.data
;
673 ConstantFolding::unary(Instruction
*i
, const ImmediateValue
&imm
)
677 if (i
->dType
!= TYPE_F32
)
680 case OP_NEG
: res
.data
.f32
= -imm
.reg
.data
.f32
; break;
681 case OP_ABS
: res
.data
.f32
= fabsf(imm
.reg
.data
.f32
); break;
682 case OP_SAT
: res
.data
.f32
= CLAMP(imm
.reg
.data
.f32
, 0.0f
, 1.0f
); break;
683 case OP_RCP
: res
.data
.f32
= 1.0f
/ imm
.reg
.data
.f32
; break;
684 case OP_RSQ
: res
.data
.f32
= 1.0f
/ sqrtf(imm
.reg
.data
.f32
); break;
685 case OP_LG2
: res
.data
.f32
= log2f(imm
.reg
.data
.f32
); break;
686 case OP_EX2
: res
.data
.f32
= exp2f(imm
.reg
.data
.f32
); break;
687 case OP_SIN
: res
.data
.f32
= sinf(imm
.reg
.data
.f32
); break;
688 case OP_COS
: res
.data
.f32
= cosf(imm
.reg
.data
.f32
); break;
689 case OP_SQRT
: res
.data
.f32
= sqrtf(imm
.reg
.data
.f32
); break;
692 // these should be handled in subsequent OP_SIN/COS/EX2
693 res
.data
.f32
= imm
.reg
.data
.f32
;
699 i
->setSrc(0, new_ImmediateValue(i
->bb
->getProgram(), res
.data
.f32
));
700 i
->src(0).mod
= Modifier(0);
704 ConstantFolding::tryCollapseChainedMULs(Instruction
*mul2
,
705 const int s
, ImmediateValue
& imm2
)
707 const int t
= s
? 0 : 1;
709 Instruction
*mul1
= NULL
; // mul1 before mul2
711 float f
= imm2
.reg
.data
.f32
* exp2f(mul2
->postFactor
);
714 assert(mul2
->op
== OP_MUL
&& mul2
->dType
== TYPE_F32
);
716 if (mul2
->getSrc(t
)->refCount() == 1) {
717 insn
= mul2
->getSrc(t
)->getInsn();
718 if (!mul2
->src(t
).mod
&& insn
->op
== OP_MUL
&& insn
->dType
== TYPE_F32
)
720 if (mul1
&& !mul1
->saturate
) {
723 if (mul1
->src(s1
= 0).getImmediate(imm1
) ||
724 mul1
->src(s1
= 1).getImmediate(imm1
)) {
725 bld
.setPosition(mul1
, false);
727 // d = mul a, imm2 -> d = mul r, (imm1 * imm2)
728 mul1
->setSrc(s1
, bld
.loadImm(NULL
, f
* imm1
.reg
.data
.f32
));
729 mul1
->src(s1
).mod
= Modifier(0);
730 mul2
->def(0).replace(mul1
->getDef(0), false);
731 mul1
->saturate
= mul2
->saturate
;
733 if (prog
->getTarget()->isPostMultiplySupported(OP_MUL
, f
, e
)) {
735 // d = mul c, imm -> d = mul_x_imm a, b
736 mul1
->postFactor
= e
;
737 mul2
->def(0).replace(mul1
->getDef(0), false);
739 mul1
->src(0).mod
*= Modifier(NV50_IR_MOD_NEG
);
740 mul1
->saturate
= mul2
->saturate
;
745 if (mul2
->getDef(0)->refCount() == 1 && !mul2
->saturate
) {
747 // d = mul b, c -> d = mul_x_imm a, c
749 insn
= (*mul2
->getDef(0)->uses
.begin())->getInsn();
754 s2
= insn
->getSrc(0) == mul1
->getDef(0) ? 0 : 1;
756 if (insn
->op
== OP_MUL
&& insn
->dType
== TYPE_F32
)
757 if (!insn
->src(s2
).mod
&& !insn
->src(t2
).getImmediate(imm1
))
759 if (mul2
&& prog
->getTarget()->isPostMultiplySupported(OP_MUL
, f
, e
)) {
760 mul2
->postFactor
= e
;
761 mul2
->setSrc(s2
, mul1
->src(t
));
763 mul2
->src(s2
).mod
*= Modifier(NV50_IR_MOD_NEG
);
769 ConstantFolding::opnd(Instruction
*i
, ImmediateValue
&imm0
, int s
)
772 const operation op
= i
->op
;
773 Instruction
*newi
= i
;
777 if (i
->dType
== TYPE_F32
)
778 tryCollapseChainedMULs(i
, s
, imm0
);
780 if (i
->subOp
== NV50_IR_SUBOP_MUL_HIGH
) {
781 assert(!isFloatType(i
->sType
));
782 if (imm0
.isInteger(1) && i
->dType
== TYPE_S32
) {
783 bld
.setPosition(i
, false);
784 // Need to set to the sign value, which is a compare.
785 newi
= bld
.mkCmp(OP_SET
, CC_LT
, TYPE_S32
, i
->getDef(0),
786 TYPE_S32
, i
->getSrc(t
), bld
.mkImm(0));
787 delete_Instruction(prog
, i
);
788 } else if (imm0
.isInteger(0) || imm0
.isInteger(1)) {
789 // The high bits can't be set in this case (either mul by 0 or
793 i
->setSrc(0, new_ImmediateValue(prog
, 0u));
794 i
->src(0).mod
= Modifier(0);
796 } else if (!imm0
.isNegative() && imm0
.isPow2()) {
797 // Translate into a shift
801 imm0
.reg
.data
.u32
= 32 - imm0
.reg
.data
.u32
;
802 i
->setSrc(0, i
->getSrc(t
));
803 i
->src(0).mod
= i
->src(t
).mod
;
804 i
->setSrc(1, new_ImmediateValue(prog
, imm0
.reg
.data
.u32
));
808 if (imm0
.isInteger(0)) {
810 i
->setSrc(0, new_ImmediateValue(prog
, 0u));
811 i
->src(0).mod
= Modifier(0);
815 if (!i
->postFactor
&& (imm0
.isInteger(1) || imm0
.isInteger(-1))) {
816 if (imm0
.isNegative())
817 i
->src(t
).mod
= i
->src(t
).mod
^ Modifier(NV50_IR_MOD_NEG
);
818 i
->op
= i
->src(t
).mod
.getOp();
820 i
->setSrc(0, i
->getSrc(1));
821 i
->src(0).mod
= i
->src(1).mod
;
828 if (!i
->postFactor
&& (imm0
.isInteger(2) || imm0
.isInteger(-2))) {
829 if (imm0
.isNegative())
830 i
->src(t
).mod
= i
->src(t
).mod
^ Modifier(NV50_IR_MOD_NEG
);
832 i
->setSrc(s
, i
->getSrc(t
));
833 i
->src(s
).mod
= i
->src(t
).mod
;
835 if (!isFloatType(i
->sType
) && !imm0
.isNegative() && imm0
.isPow2()) {
838 i
->setSrc(0, i
->getSrc(t
));
839 i
->src(0).mod
= i
->src(t
).mod
;
840 i
->setSrc(1, new_ImmediateValue(prog
, imm0
.reg
.data
.u32
));
845 if (imm0
.isInteger(0)) {
846 i
->setSrc(0, i
->getSrc(2));
847 i
->src(0).mod
= i
->src(2).mod
;
850 i
->op
= i
->src(0).mod
.getOp();
854 if (imm0
.isInteger(1) || imm0
.isInteger(-1)) {
855 if (imm0
.isNegative())
856 i
->src(t
).mod
= i
->src(t
).mod
^ Modifier(NV50_IR_MOD_NEG
);
858 i
->setSrc(0, i
->getSrc(1));
859 i
->src(0).mod
= i
->src(1).mod
;
861 i
->setSrc(1, i
->getSrc(2));
862 i
->src(1).mod
= i
->src(2).mod
;
870 if (imm0
.isInteger(0)) {
872 i
->setSrc(0, i
->getSrc(1));
873 i
->src(0).mod
= i
->src(1).mod
;
876 i
->op
= i
->src(0).mod
.getOp();
878 i
->src(0).mod
= Modifier(0);
883 if (s
!= 1 || (i
->dType
!= TYPE_S32
&& i
->dType
!= TYPE_U32
))
885 bld
.setPosition(i
, false);
886 if (imm0
.reg
.data
.u32
== 0) {
889 if (imm0
.reg
.data
.u32
== 1) {
893 if (i
->dType
== TYPE_U32
&& imm0
.isPow2()) {
895 i
->setSrc(1, bld
.mkImm(util_logbase2(imm0
.reg
.data
.u32
)));
897 if (i
->dType
== TYPE_U32
) {
900 const uint32_t d
= imm0
.reg
.data
.u32
;
903 uint32_t l
= util_logbase2(d
);
904 if (((uint32_t)1 << l
) < d
)
906 m
= (((uint64_t)1 << 32) * (((uint64_t)1 << l
) - d
)) / d
+ 1;
912 mul
= bld
.mkOp2(OP_MUL
, TYPE_U32
, tA
, i
->getSrc(0),
913 bld
.loadImm(NULL
, m
));
914 mul
->subOp
= NV50_IR_SUBOP_MUL_HIGH
;
915 bld
.mkOp2(OP_SUB
, TYPE_U32
, tB
, i
->getSrc(0), tA
);
918 bld
.mkOp2(OP_SHR
, TYPE_U32
, tA
, tB
, bld
.mkImm(r
));
921 tB
= s
? bld
.getSSA() : i
->getDef(0);
922 newi
= bld
.mkOp2(OP_ADD
, TYPE_U32
, tB
, mul
->getDef(0), tA
);
924 bld
.mkOp2(OP_SHR
, TYPE_U32
, i
->getDef(0), tB
, bld
.mkImm(s
));
926 delete_Instruction(prog
, i
);
928 if (imm0
.reg
.data
.s32
== -1) {
934 const int32_t d
= imm0
.reg
.data
.s32
;
936 int32_t l
= util_logbase2(static_cast<unsigned>(abs(d
)));
937 if ((1 << l
) < abs(d
))
941 m
= ((uint64_t)1 << (32 + l
- 1)) / abs(d
) + 1 - ((uint64_t)1 << 32);
945 bld
.mkOp3(OP_MAD
, TYPE_S32
, tA
, i
->getSrc(0), bld
.loadImm(NULL
, m
),
946 i
->getSrc(0))->subOp
= NV50_IR_SUBOP_MUL_HIGH
;
948 bld
.mkOp2(OP_SHR
, TYPE_S32
, tB
, tA
, bld
.mkImm(l
- 1));
952 bld
.mkCmp(OP_SET
, CC_LT
, TYPE_S32
, tA
, TYPE_S32
, i
->getSrc(0), bld
.mkImm(0));
953 tD
= (d
< 0) ? bld
.getSSA() : i
->getDef(0)->asLValue();
954 newi
= bld
.mkOp2(OP_SUB
, TYPE_U32
, tD
, tB
, tA
);
956 bld
.mkOp1(OP_NEG
, TYPE_S32
, i
->getDef(0), tB
);
958 delete_Instruction(prog
, i
);
963 if (i
->sType
== TYPE_U32
&& imm0
.isPow2()) {
964 bld
.setPosition(i
, false);
966 i
->setSrc(1, bld
.loadImm(NULL
, imm0
.reg
.data
.u32
- 1));
970 case OP_SET
: // TODO: SET_AND,OR,XOR
972 /* This optimizes the case where the output of a set is being compared
973 * to zero. Since the set can only produce 0/-1 (int) or 0/1 (float), we
974 * can be a lot cleverer in our comparison.
976 CmpInstruction
*si
= findOriginForTestWithZero(i
->getSrc(t
));
978 if (imm0
.reg
.data
.u32
!= 0 || !si
)
981 ccZ
= (CondCode
)((unsigned int)i
->asCmp()->setCond
& ~CC_U
);
982 // We do everything assuming var (cmp) 0, reverse the condition if 0 is
985 ccZ
= reverseCondCode(ccZ
);
986 // If there is a negative modifier, we need to undo that, by flipping
987 // the comparison to zero.
988 if (i
->src(t
).mod
.neg())
989 ccZ
= reverseCondCode(ccZ
);
990 // If this is a signed comparison, we expect the input to be a regular
991 // boolean, i.e. 0/-1. However the rest of the logic assumes that true
992 // is positive, so just flip the sign.
993 if (i
->sType
== TYPE_S32
) {
994 assert(!isFloatType(si
->dType
));
995 ccZ
= reverseCondCode(ccZ
);
998 case CC_LT
: cc
= CC_FL
; break; // bool < 0 -- this is never true
999 case CC_GE
: cc
= CC_TR
; break; // bool >= 0 -- this is always true
1000 case CC_EQ
: cc
= inverseCondCode(cc
); break; // bool == 0 -- !bool
1001 case CC_LE
: cc
= inverseCondCode(cc
); break; // bool <= 0 -- !bool
1002 case CC_GT
: break; // bool > 0 -- bool
1003 case CC_NE
: break; // bool != 0 -- bool
1008 // Update the condition of this SET to be identical to the origin set,
1009 // but with the updated condition code. The original SET should get
1012 i
->asCmp()->setCond
= cc
;
1013 i
->setSrc(0, si
->src(0));
1014 i
->setSrc(1, si
->src(1));
1015 if (si
->srcExists(2))
1016 i
->setSrc(2, si
->src(2));
1017 i
->sType
= si
->sType
;
1023 CmpInstruction
*cmp
= i
->getSrc(t
)->getInsn()->asCmp();
1024 if (!cmp
|| cmp
->op
== OP_SLCT
|| cmp
->getDef(0)->refCount() > 1)
1026 if (!prog
->getTarget()->isOpSupported(cmp
->op
, TYPE_F32
))
1028 if (imm0
.reg
.data
.f32
!= 1.0)
1030 if (i
->getSrc(t
)->getInsn()->dType
!= TYPE_U32
)
1033 i
->getSrc(t
)->getInsn()->dType
= TYPE_F32
;
1034 if (i
->src(t
).mod
!= Modifier(0)) {
1035 assert(i
->src(t
).mod
== Modifier(NV50_IR_MOD_NOT
));
1036 i
->src(t
).mod
= Modifier(0);
1037 cmp
->setCond
= inverseCondCode(cmp
->setCond
);
1042 i
->setSrc(0, i
->getSrc(t
));
1050 if (s
!= 1 || i
->src(0).mod
!= Modifier(0))
1052 // try to concatenate shifts
1053 Instruction
*si
= i
->getSrc(0)->getInsn();
1054 if (!si
|| si
->op
!= OP_SHL
)
1056 ImmediateValue imm1
;
1057 if (si
->src(1).getImmediate(imm1
)) {
1058 bld
.setPosition(i
, false);
1059 i
->setSrc(0, si
->getSrc(0));
1060 i
->setSrc(1, bld
.loadImm(NULL
, imm0
.reg
.data
.u32
+ imm1
.reg
.data
.u32
));
1082 case TYPE_S32
: res
= util_last_bit_signed(imm0
.reg
.data
.s32
) - 1; break;
1083 case TYPE_U32
: res
= util_last_bit(imm0
.reg
.data
.u32
) - 1; break;
1087 if (i
->subOp
== NV50_IR_SUBOP_BFIND_SAMT
&& res
>= 0)
1089 bld
.setPosition(i
, false); /* make sure bld is init'ed */
1090 i
->setSrc(0, bld
.mkImm(res
));
1097 // Only deal with 1-arg POPCNT here
1098 if (i
->srcExists(1))
1100 uint32_t res
= util_bitcount(imm0
.reg
.data
.u32
);
1101 i
->setSrc(0, new_ImmediateValue(i
->bb
->getProgram(), res
));
1113 // =============================================================================
1115 // Merge modifier operations (ABS, NEG, NOT) into ValueRefs where allowed.
1116 class ModifierFolding
: public Pass
1119 virtual bool visit(BasicBlock
*);
1123 ModifierFolding::visit(BasicBlock
*bb
)
1125 const Target
*target
= prog
->getTarget();
1127 Instruction
*i
, *next
, *mi
;
1130 for (i
= bb
->getEntry(); i
; i
= next
) {
1133 if (0 && i
->op
== OP_SUB
) {
1134 // turn "sub" into "add neg" (do we really want this ?)
1136 i
->src(0).mod
= i
->src(0).mod
^ Modifier(NV50_IR_MOD_NEG
);
1139 for (int s
= 0; s
< 3 && i
->srcExists(s
); ++s
) {
1140 mi
= i
->getSrc(s
)->getInsn();
1142 mi
->predSrc
>= 0 || mi
->getDef(0)->refCount() > 8)
1144 if (i
->sType
== TYPE_U32
&& mi
->dType
== TYPE_S32
) {
1145 if ((i
->op
!= OP_ADD
&&
1147 (mi
->op
!= OP_ABS
&&
1151 if (i
->sType
!= mi
->dType
) {
1154 if ((mod
= Modifier(mi
->op
)) == Modifier(0))
1156 mod
*= mi
->src(0).mod
;
1158 if ((i
->op
== OP_ABS
) || i
->src(s
).mod
.abs()) {
1159 // abs neg [abs] = abs
1160 mod
= mod
& Modifier(~(NV50_IR_MOD_NEG
| NV50_IR_MOD_ABS
));
1162 if ((i
->op
== OP_NEG
) && mod
.neg()) {
1164 // neg as both opcode and modifier on same insn is prohibited
1165 // neg neg abs = abs, neg neg = identity
1166 mod
= mod
& Modifier(~NV50_IR_MOD_NEG
);
1167 i
->op
= mod
.getOp();
1168 mod
= mod
& Modifier(~NV50_IR_MOD_ABS
);
1169 if (mod
== Modifier(0))
1173 if (target
->isModSupported(i
, s
, mod
)) {
1174 i
->setSrc(s
, mi
->getSrc(0));
1175 i
->src(s
).mod
*= mod
;
1179 if (i
->op
== OP_SAT
) {
1180 mi
= i
->getSrc(0)->getInsn();
1182 mi
->getDef(0)->refCount() <= 1 && target
->isSatSupported(mi
)) {
1184 mi
->setDef(0, i
->getDef(0));
1185 delete_Instruction(prog
, i
);
1193 // =============================================================================
1195 // MUL + ADD -> MAD/FMA
1196 // MIN/MAX(a, a) -> a, etc.
1197 // SLCT(a, b, const) -> cc(const) ? a : b
1199 // MUL(MUL(a, b), const) -> MUL_Xconst(a, b)
1200 class AlgebraicOpt
: public Pass
1203 virtual bool visit(BasicBlock
*);
1205 void handleABS(Instruction
*);
1206 bool handleADD(Instruction
*);
1207 bool tryADDToMADOrSAD(Instruction
*, operation toOp
);
1208 void handleMINMAX(Instruction
*);
1209 void handleRCP(Instruction
*);
1210 void handleSLCT(Instruction
*);
1211 void handleLOGOP(Instruction
*);
1212 void handleCVT(Instruction
*);
1213 void handleSUCLAMP(Instruction
*);
1219 AlgebraicOpt::handleABS(Instruction
*abs
)
1221 Instruction
*sub
= abs
->getSrc(0)->getInsn();
1224 !prog
->getTarget()->isOpSupported(OP_SAD
, abs
->dType
))
1226 // expect not to have mods yet, if we do, bail
1227 if (sub
->src(0).mod
|| sub
->src(1).mod
)
1229 // hidden conversion ?
1230 ty
= intTypeToSigned(sub
->dType
);
1231 if (abs
->dType
!= abs
->sType
|| ty
!= abs
->sType
)
1234 if ((sub
->op
!= OP_ADD
&& sub
->op
!= OP_SUB
) ||
1235 sub
->src(0).getFile() != FILE_GPR
|| sub
->src(0).mod
||
1236 sub
->src(1).getFile() != FILE_GPR
|| sub
->src(1).mod
)
1239 Value
*src0
= sub
->getSrc(0);
1240 Value
*src1
= sub
->getSrc(1);
1242 if (sub
->op
== OP_ADD
) {
1243 Instruction
*neg
= sub
->getSrc(1)->getInsn();
1244 if (neg
&& neg
->op
!= OP_NEG
) {
1245 neg
= sub
->getSrc(0)->getInsn();
1246 src0
= sub
->getSrc(1);
1248 if (!neg
|| neg
->op
!= OP_NEG
||
1249 neg
->dType
!= neg
->sType
|| neg
->sType
!= ty
)
1251 src1
= neg
->getSrc(0);
1255 abs
->moveSources(1, 2); // move sources >=1 up by 2
1257 abs
->setType(sub
->dType
);
1258 abs
->setSrc(0, src0
);
1259 abs
->setSrc(1, src1
);
1260 bld
.setPosition(abs
, false);
1261 abs
->setSrc(2, bld
.loadImm(bld
.getSSA(typeSizeof(ty
)), 0));
1265 AlgebraicOpt::handleADD(Instruction
*add
)
1267 Value
*src0
= add
->getSrc(0);
1268 Value
*src1
= add
->getSrc(1);
1270 if (src0
->reg
.file
!= FILE_GPR
|| src1
->reg
.file
!= FILE_GPR
)
1273 bool changed
= false;
1274 if (!changed
&& prog
->getTarget()->isOpSupported(OP_MAD
, add
->dType
))
1275 changed
= tryADDToMADOrSAD(add
, OP_MAD
);
1276 if (!changed
&& prog
->getTarget()->isOpSupported(OP_SAD
, add
->dType
))
1277 changed
= tryADDToMADOrSAD(add
, OP_SAD
);
1281 // ADD(SAD(a,b,0), c) -> SAD(a,b,c)
1282 // ADD(MUL(a,b), c) -> MAD(a,b,c)
1284 AlgebraicOpt::tryADDToMADOrSAD(Instruction
*add
, operation toOp
)
1286 Value
*src0
= add
->getSrc(0);
1287 Value
*src1
= add
->getSrc(1);
1290 const operation srcOp
= toOp
== OP_SAD
? OP_SAD
: OP_MUL
;
1291 const Modifier modBad
= Modifier(~((toOp
== OP_MAD
) ? NV50_IR_MOD_NEG
: 0));
1294 if (src0
->refCount() == 1 &&
1295 src0
->getUniqueInsn() && src0
->getUniqueInsn()->op
== srcOp
)
1298 if (src1
->refCount() == 1 &&
1299 src1
->getUniqueInsn() && src1
->getUniqueInsn()->op
== srcOp
)
1304 if ((src0
->getUniqueInsn() && src0
->getUniqueInsn()->bb
!= add
->bb
) ||
1305 (src1
->getUniqueInsn() && src1
->getUniqueInsn()->bb
!= add
->bb
))
1308 src
= add
->getSrc(s
);
1310 if (src
->getInsn()->postFactor
)
1312 if (toOp
== OP_SAD
) {
1314 if (!src
->getInsn()->src(2).getImmediate(imm
))
1316 if (!imm
.isInteger(0))
1320 mod
[0] = add
->src(0).mod
;
1321 mod
[1] = add
->src(1).mod
;
1322 mod
[2] = src
->getUniqueInsn()->src(0).mod
;
1323 mod
[3] = src
->getUniqueInsn()->src(1).mod
;
1325 if (((mod
[0] | mod
[1]) | (mod
[2] | mod
[3])) & modBad
)
1329 add
->subOp
= src
->getInsn()->subOp
; // potentially mul-high
1331 add
->setSrc(2, add
->src(s
? 0 : 1));
1333 add
->setSrc(0, src
->getInsn()->getSrc(0));
1334 add
->src(0).mod
= mod
[2] ^ mod
[s
];
1335 add
->setSrc(1, src
->getInsn()->getSrc(1));
1336 add
->src(1).mod
= mod
[3];
1342 AlgebraicOpt::handleMINMAX(Instruction
*minmax
)
1344 Value
*src0
= minmax
->getSrc(0);
1345 Value
*src1
= minmax
->getSrc(1);
1347 if (src0
!= src1
|| src0
->reg
.file
!= FILE_GPR
)
1349 if (minmax
->src(0).mod
== minmax
->src(1).mod
) {
1350 if (minmax
->def(0).mayReplace(minmax
->src(0))) {
1351 minmax
->def(0).replace(minmax
->src(0), false);
1352 minmax
->bb
->remove(minmax
);
1354 minmax
->op
= OP_CVT
;
1355 minmax
->setSrc(1, NULL
);
1359 // min(x, -x) = -abs(x)
1360 // min(x, -abs(x)) = -abs(x)
1361 // min(x, abs(x)) = x
1362 // max(x, -abs(x)) = x
1363 // max(x, abs(x)) = abs(x)
1364 // max(x, -x) = abs(x)
1369 AlgebraicOpt::handleRCP(Instruction
*rcp
)
1371 Instruction
*si
= rcp
->getSrc(0)->getUniqueInsn();
1373 if (si
&& si
->op
== OP_RCP
) {
1374 Modifier mod
= rcp
->src(0).mod
* si
->src(0).mod
;
1375 rcp
->op
= mod
.getOp();
1376 rcp
->setSrc(0, si
->getSrc(0));
1381 AlgebraicOpt::handleSLCT(Instruction
*slct
)
1383 if (slct
->getSrc(2)->reg
.file
== FILE_IMMEDIATE
) {
1384 if (slct
->getSrc(2)->asImm()->compare(slct
->asCmp()->setCond
, 0.0f
))
1385 slct
->setSrc(0, slct
->getSrc(1));
1387 if (slct
->getSrc(0) != slct
->getSrc(1)) {
1391 slct
->setSrc(1, NULL
);
1392 slct
->setSrc(2, NULL
);
1396 AlgebraicOpt::handleLOGOP(Instruction
*logop
)
1398 Value
*src0
= logop
->getSrc(0);
1399 Value
*src1
= logop
->getSrc(1);
1401 if (src0
->reg
.file
!= FILE_GPR
|| src1
->reg
.file
!= FILE_GPR
)
1405 if ((logop
->op
== OP_AND
|| logop
->op
== OP_OR
) &&
1406 logop
->def(0).mayReplace(logop
->src(0))) {
1407 logop
->def(0).replace(logop
->src(0), false);
1408 delete_Instruction(prog
, logop
);
1411 // try AND(SET, SET) -> SET_AND(SET)
1412 Instruction
*set0
= src0
->getInsn();
1413 Instruction
*set1
= src1
->getInsn();
1415 if (!set0
|| set0
->fixed
|| !set1
|| set1
->fixed
)
1417 if (set1
->op
!= OP_SET
) {
1418 Instruction
*xchg
= set0
;
1421 if (set1
->op
!= OP_SET
)
1424 operation redOp
= (logop
->op
== OP_AND
? OP_SET_AND
:
1425 logop
->op
== OP_XOR
? OP_SET_XOR
: OP_SET_OR
);
1426 if (!prog
->getTarget()->isOpSupported(redOp
, set1
->sType
))
1428 if (set0
->op
!= OP_SET
&&
1429 set0
->op
!= OP_SET_AND
&&
1430 set0
->op
!= OP_SET_OR
&&
1431 set0
->op
!= OP_SET_XOR
)
1433 if (set0
->getDef(0)->refCount() > 1 &&
1434 set1
->getDef(0)->refCount() > 1)
1436 if (set0
->getPredicate() || set1
->getPredicate())
1438 // check that they don't source each other
1439 for (int s
= 0; s
< 2; ++s
)
1440 if (set0
->getSrc(s
) == set1
->getDef(0) ||
1441 set1
->getSrc(s
) == set0
->getDef(0))
1444 set0
= cloneForward(func
, set0
);
1445 set1
= cloneShallow(func
, set1
);
1446 logop
->bb
->insertAfter(logop
, set1
);
1447 logop
->bb
->insertAfter(logop
, set0
);
1449 set0
->dType
= TYPE_U8
;
1450 set0
->getDef(0)->reg
.file
= FILE_PREDICATE
;
1451 set0
->getDef(0)->reg
.size
= 1;
1452 set1
->setSrc(2, set0
->getDef(0));
1454 set1
->setDef(0, logop
->getDef(0));
1455 delete_Instruction(prog
, logop
);
1459 // F2I(NEG(SET with result 1.0f/0.0f)) -> SET with result -1/0
1461 // F2I(NEG(I2F(ABS(SET))))
1463 AlgebraicOpt::handleCVT(Instruction
*cvt
)
1465 if (cvt
->sType
!= TYPE_F32
||
1466 cvt
->dType
!= TYPE_S32
|| cvt
->src(0).mod
!= Modifier(0))
1468 Instruction
*insn
= cvt
->getSrc(0)->getInsn();
1469 if (!insn
|| insn
->op
!= OP_NEG
|| insn
->dType
!= TYPE_F32
)
1471 if (insn
->src(0).mod
!= Modifier(0))
1473 insn
= insn
->getSrc(0)->getInsn();
1475 // check for nv50 SET(-1,0) -> SET(1.0f/0.0f) chain and nvc0's f32 SET
1476 if (insn
&& insn
->op
== OP_CVT
&&
1477 insn
->dType
== TYPE_F32
&&
1478 insn
->sType
== TYPE_S32
) {
1479 insn
= insn
->getSrc(0)->getInsn();
1480 if (!insn
|| insn
->op
!= OP_ABS
|| insn
->sType
!= TYPE_S32
||
1483 insn
= insn
->getSrc(0)->getInsn();
1484 if (!insn
|| insn
->op
!= OP_SET
|| insn
->dType
!= TYPE_U32
)
1487 if (!insn
|| insn
->op
!= OP_SET
|| insn
->dType
!= TYPE_F32
) {
1491 Instruction
*bset
= cloneShallow(func
, insn
);
1492 bset
->dType
= TYPE_U32
;
1493 bset
->setDef(0, cvt
->getDef(0));
1494 cvt
->bb
->insertAfter(cvt
, bset
);
1495 delete_Instruction(prog
, cvt
);
1498 // SUCLAMP dst, (ADD b imm), k, 0 -> SUCLAMP dst, b, k, imm (if imm fits s6)
1500 AlgebraicOpt::handleSUCLAMP(Instruction
*insn
)
1503 int32_t val
= insn
->getSrc(2)->asImm()->reg
.data
.s32
;
1507 assert(insn
->srcExists(0) && insn
->src(0).getFile() == FILE_GPR
);
1509 // look for ADD (TODO: only count references by non-SUCLAMP)
1510 if (insn
->getSrc(0)->refCount() > 1)
1512 add
= insn
->getSrc(0)->getInsn();
1513 if (!add
|| add
->op
!= OP_ADD
||
1514 (add
->dType
!= TYPE_U32
&&
1515 add
->dType
!= TYPE_S32
))
1518 // look for immediate
1519 for (s
= 0; s
< 2; ++s
)
1520 if (add
->src(s
).getImmediate(imm
))
1525 // determine if immediate fits
1526 val
+= imm
.reg
.data
.s32
;
1527 if (val
> 31 || val
< -32)
1529 // determine if other addend fits
1530 if (add
->src(s
).getFile() != FILE_GPR
|| add
->src(s
).mod
!= Modifier(0))
1533 bld
.setPosition(insn
, false); // make sure bld is init'ed
1535 insn
->setSrc(2, bld
.mkImm(val
));
1536 insn
->setSrc(0, add
->getSrc(s
));
1540 AlgebraicOpt::visit(BasicBlock
*bb
)
1543 for (Instruction
*i
= bb
->getEntry(); i
; i
= next
) {
1581 // =============================================================================
1584 updateLdStOffset(Instruction
*ldst
, int32_t offset
, Function
*fn
)
1586 if (offset
!= ldst
->getSrc(0)->reg
.data
.offset
) {
1587 if (ldst
->getSrc(0)->refCount() > 1)
1588 ldst
->setSrc(0, cloneShallow(fn
, ldst
->getSrc(0)));
1589 ldst
->getSrc(0)->reg
.data
.offset
= offset
;
1593 // Combine loads and stores, forward stores to loads where possible.
1594 class MemoryOpt
: public Pass
1602 const Value
*rel
[2];
1610 bool overlaps(const Instruction
*ldst
) const;
1612 inline void link(Record
**);
1613 inline void unlink(Record
**);
1614 inline void set(const Instruction
*ldst
);
1620 Record
*loads
[DATA_FILE_COUNT
];
1621 Record
*stores
[DATA_FILE_COUNT
];
1623 MemoryPool recordPool
;
1626 virtual bool visit(BasicBlock
*);
1627 bool runOpt(BasicBlock
*);
1629 Record
**getList(const Instruction
*);
1631 Record
*findRecord(const Instruction
*, bool load
, bool& isAdjacent
) const;
1633 // merge @insn into load/store instruction from @rec
1634 bool combineLd(Record
*rec
, Instruction
*ld
);
1635 bool combineSt(Record
*rec
, Instruction
*st
);
1637 bool replaceLdFromLd(Instruction
*ld
, Record
*ldRec
);
1638 bool replaceLdFromSt(Instruction
*ld
, Record
*stRec
);
1639 bool replaceStFromSt(Instruction
*restrict st
, Record
*stRec
);
1641 void addRecord(Instruction
*ldst
);
1642 void purgeRecords(Instruction
*const st
, DataFile
);
1643 void lockStores(Instruction
*const ld
);
1650 MemoryOpt::MemoryOpt() : recordPool(sizeof(MemoryOpt::Record
), 6)
1652 for (int i
= 0; i
< DATA_FILE_COUNT
; ++i
) {
1662 for (unsigned int i
= 0; i
< DATA_FILE_COUNT
; ++i
) {
1664 for (it
= loads
[i
]; it
; it
= next
) {
1666 recordPool
.release(it
);
1669 for (it
= stores
[i
]; it
; it
= next
) {
1671 recordPool
.release(it
);
1678 MemoryOpt::combineLd(Record
*rec
, Instruction
*ld
)
1680 int32_t offRc
= rec
->offset
;
1681 int32_t offLd
= ld
->getSrc(0)->reg
.data
.offset
;
1682 int sizeRc
= rec
->size
;
1683 int sizeLd
= typeSizeof(ld
->dType
);
1684 int size
= sizeRc
+ sizeLd
;
1687 if (!prog
->getTarget()->
1688 isAccessSupported(ld
->getSrc(0)->reg
.file
, typeOfSize(size
)))
1690 // no unaligned loads
1691 if (((size
== 0x8) && (MIN2(offLd
, offRc
) & 0x7)) ||
1692 ((size
== 0xc) && (MIN2(offLd
, offRc
) & 0xf)))
1695 assert(sizeRc
+ sizeLd
<= 16 && offRc
!= offLd
);
1697 for (j
= 0; sizeRc
; sizeRc
-= rec
->insn
->getDef(j
)->reg
.size
, ++j
);
1699 if (offLd
< offRc
) {
1701 for (sz
= 0, d
= 0; sz
< sizeLd
; sz
+= ld
->getDef(d
)->reg
.size
, ++d
);
1702 // d: nr of definitions in ld
1703 // j: nr of definitions in rec->insn, move:
1704 for (d
= d
+ j
- 1; j
> 0; --j
, --d
)
1705 rec
->insn
->setDef(d
, rec
->insn
->getDef(j
- 1));
1707 if (rec
->insn
->getSrc(0)->refCount() > 1)
1708 rec
->insn
->setSrc(0, cloneShallow(func
, rec
->insn
->getSrc(0)));
1709 rec
->offset
= rec
->insn
->getSrc(0)->reg
.data
.offset
= offLd
;
1715 // move definitions of @ld to @rec->insn
1716 for (j
= 0; sizeLd
; ++j
, ++d
) {
1717 sizeLd
-= ld
->getDef(j
)->reg
.size
;
1718 rec
->insn
->setDef(d
, ld
->getDef(j
));
1722 rec
->insn
->getSrc(0)->reg
.size
= size
;
1723 rec
->insn
->setType(typeOfSize(size
));
1725 delete_Instruction(prog
, ld
);
1731 MemoryOpt::combineSt(Record
*rec
, Instruction
*st
)
1733 int32_t offRc
= rec
->offset
;
1734 int32_t offSt
= st
->getSrc(0)->reg
.data
.offset
;
1735 int sizeRc
= rec
->size
;
1736 int sizeSt
= typeSizeof(st
->dType
);
1738 int size
= sizeRc
+ sizeSt
;
1740 Value
*src
[4]; // no modifiers in ValueRef allowed for st
1743 if (!prog
->getTarget()->
1744 isAccessSupported(st
->getSrc(0)->reg
.file
, typeOfSize(size
)))
1746 if (size
== 8 && MIN2(offRc
, offSt
) & 0x7)
1749 st
->takeExtraSources(0, extra
); // save predicate and indirect address
1751 if (offRc
< offSt
) {
1752 // save values from @st
1753 for (s
= 0; sizeSt
; ++s
) {
1754 sizeSt
-= st
->getSrc(s
+ 1)->reg
.size
;
1755 src
[s
] = st
->getSrc(s
+ 1);
1757 // set record's values as low sources of @st
1758 for (j
= 1; sizeRc
; ++j
) {
1759 sizeRc
-= rec
->insn
->getSrc(j
)->reg
.size
;
1760 st
->setSrc(j
, rec
->insn
->getSrc(j
));
1762 // set saved values as high sources of @st
1763 for (k
= j
, j
= 0; j
< s
; ++j
)
1764 st
->setSrc(k
++, src
[j
]);
1766 updateLdStOffset(st
, offRc
, func
);
1768 for (j
= 1; sizeSt
; ++j
)
1769 sizeSt
-= st
->getSrc(j
)->reg
.size
;
1770 for (s
= 1; sizeRc
; ++j
, ++s
) {
1771 sizeRc
-= rec
->insn
->getSrc(s
)->reg
.size
;
1772 st
->setSrc(j
, rec
->insn
->getSrc(s
));
1774 rec
->offset
= offSt
;
1776 st
->putExtraSources(0, extra
); // restore pointer and predicate
1778 delete_Instruction(prog
, rec
->insn
);
1781 rec
->insn
->getSrc(0)->reg
.size
= size
;
1782 rec
->insn
->setType(typeOfSize(size
));
1787 MemoryOpt::Record::set(const Instruction
*ldst
)
1789 const Symbol
*mem
= ldst
->getSrc(0)->asSym();
1790 fileIndex
= mem
->reg
.fileIndex
;
1791 rel
[0] = ldst
->getIndirect(0, 0);
1792 rel
[1] = ldst
->getIndirect(0, 1);
1793 offset
= mem
->reg
.data
.offset
;
1794 base
= mem
->getBase();
1795 size
= typeSizeof(ldst
->sType
);
1799 MemoryOpt::Record::link(Record
**list
)
1809 MemoryOpt::Record::unlink(Record
**list
)
1819 MemoryOpt::Record
**
1820 MemoryOpt::getList(const Instruction
*insn
)
1822 if (insn
->op
== OP_LOAD
|| insn
->op
== OP_VFETCH
)
1823 return &loads
[insn
->src(0).getFile()];
1824 return &stores
[insn
->src(0).getFile()];
1828 MemoryOpt::addRecord(Instruction
*i
)
1830 Record
**list
= getList(i
);
1831 Record
*it
= reinterpret_cast<Record
*>(recordPool
.allocate());
1840 MemoryOpt::findRecord(const Instruction
*insn
, bool load
, bool& isAdj
) const
1842 const Symbol
*sym
= insn
->getSrc(0)->asSym();
1843 const int size
= typeSizeof(insn
->sType
);
1845 Record
*it
= load
? loads
[sym
->reg
.file
] : stores
[sym
->reg
.file
];
1847 for (; it
; it
= it
->next
) {
1848 if (it
->locked
&& insn
->op
!= OP_LOAD
)
1850 if ((it
->offset
>> 4) != (sym
->reg
.data
.offset
>> 4) ||
1851 it
->rel
[0] != insn
->getIndirect(0, 0) ||
1852 it
->fileIndex
!= sym
->reg
.fileIndex
||
1853 it
->rel
[1] != insn
->getIndirect(0, 1))
1856 if (it
->offset
< sym
->reg
.data
.offset
) {
1857 if (it
->offset
+ it
->size
>= sym
->reg
.data
.offset
) {
1858 isAdj
= (it
->offset
+ it
->size
== sym
->reg
.data
.offset
);
1861 if (!(it
->offset
& 0x7))
1865 isAdj
= it
->offset
!= sym
->reg
.data
.offset
;
1866 if (size
<= it
->size
&& !isAdj
)
1869 if (!(sym
->reg
.data
.offset
& 0x7))
1870 if (it
->offset
- size
<= sym
->reg
.data
.offset
)
1878 MemoryOpt::replaceLdFromSt(Instruction
*ld
, Record
*rec
)
1880 Instruction
*st
= rec
->insn
;
1881 int32_t offSt
= rec
->offset
;
1882 int32_t offLd
= ld
->getSrc(0)->reg
.data
.offset
;
1885 for (s
= 1; offSt
!= offLd
&& st
->srcExists(s
); ++s
)
1886 offSt
+= st
->getSrc(s
)->reg
.size
;
1890 for (d
= 0; ld
->defExists(d
) && st
->srcExists(s
); ++d
, ++s
) {
1891 if (ld
->getDef(d
)->reg
.size
!= st
->getSrc(s
)->reg
.size
)
1893 if (st
->getSrc(s
)->reg
.file
!= FILE_GPR
)
1895 ld
->def(d
).replace(st
->src(s
), false);
1902 MemoryOpt::replaceLdFromLd(Instruction
*ldE
, Record
*rec
)
1904 Instruction
*ldR
= rec
->insn
;
1905 int32_t offR
= rec
->offset
;
1906 int32_t offE
= ldE
->getSrc(0)->reg
.data
.offset
;
1909 assert(offR
<= offE
);
1910 for (dR
= 0; offR
< offE
&& ldR
->defExists(dR
); ++dR
)
1911 offR
+= ldR
->getDef(dR
)->reg
.size
;
1915 for (dE
= 0; ldE
->defExists(dE
) && ldR
->defExists(dR
); ++dE
, ++dR
) {
1916 if (ldE
->getDef(dE
)->reg
.size
!= ldR
->getDef(dR
)->reg
.size
)
1918 ldE
->def(dE
).replace(ldR
->getDef(dR
), false);
1921 delete_Instruction(prog
, ldE
);
1926 MemoryOpt::replaceStFromSt(Instruction
*restrict st
, Record
*rec
)
1928 const Instruction
*const ri
= rec
->insn
;
1931 int32_t offS
= st
->getSrc(0)->reg
.data
.offset
;
1932 int32_t offR
= rec
->offset
;
1933 int32_t endS
= offS
+ typeSizeof(st
->dType
);
1934 int32_t endR
= offR
+ typeSizeof(ri
->dType
);
1936 rec
->size
= MAX2(endS
, endR
) - MIN2(offS
, offR
);
1938 st
->takeExtraSources(0, extra
);
1944 // get non-replaced sources of ri
1945 for (s
= 1; offR
< offS
; offR
+= ri
->getSrc(s
)->reg
.size
, ++s
)
1946 vals
[k
++] = ri
->getSrc(s
);
1948 // get replaced sources of st
1949 for (s
= 1; st
->srcExists(s
); offS
+= st
->getSrc(s
)->reg
.size
, ++s
)
1950 vals
[k
++] = st
->getSrc(s
);
1951 // skip replaced sources of ri
1952 for (s
= n
; offR
< endS
; offR
+= ri
->getSrc(s
)->reg
.size
, ++s
);
1953 // get non-replaced sources after values covered by st
1954 for (; offR
< endR
; offR
+= ri
->getSrc(s
)->reg
.size
, ++s
)
1955 vals
[k
++] = ri
->getSrc(s
);
1956 assert((unsigned int)k
<= Elements(vals
));
1957 for (s
= 0; s
< k
; ++s
)
1958 st
->setSrc(s
+ 1, vals
[s
]);
1959 st
->setSrc(0, ri
->getSrc(0));
1963 for (j
= 1; offR
< endS
; offR
+= ri
->getSrc(j
++)->reg
.size
);
1964 for (s
= 1; offS
< endS
; offS
+= st
->getSrc(s
++)->reg
.size
);
1965 for (; offR
< endR
; offR
+= ri
->getSrc(j
++)->reg
.size
)
1966 st
->setSrc(s
++, ri
->getSrc(j
));
1968 st
->putExtraSources(0, extra
);
1970 delete_Instruction(prog
, rec
->insn
);
1973 rec
->offset
= st
->getSrc(0)->reg
.data
.offset
;
1975 st
->setType(typeOfSize(rec
->size
));
1981 MemoryOpt::Record::overlaps(const Instruction
*ldst
) const
1986 if (this->fileIndex
!= that
.fileIndex
)
1989 if (this->rel
[0] || that
.rel
[0])
1990 return this->base
== that
.base
;
1992 (this->offset
< that
.offset
+ that
.size
) &&
1993 (this->offset
+ this->size
> that
.offset
);
1996 // We must not eliminate stores that affect the result of @ld if
1997 // we find later stores to the same location, and we may no longer
1998 // merge them with later stores.
1999 // The stored value can, however, still be used to determine the value
2000 // returned by future loads.
2002 MemoryOpt::lockStores(Instruction
*const ld
)
2004 for (Record
*r
= stores
[ld
->src(0).getFile()]; r
; r
= r
->next
)
2005 if (!r
->locked
&& r
->overlaps(ld
))
2009 // Prior loads from the location of @st are no longer valid.
2010 // Stores to the location of @st may no longer be used to derive
2011 // the value at it nor be coalesced into later stores.
2013 MemoryOpt::purgeRecords(Instruction
*const st
, DataFile f
)
2016 f
= st
->src(0).getFile();
2018 for (Record
*r
= loads
[f
]; r
; r
= r
->next
)
2019 if (!st
|| r
->overlaps(st
))
2020 r
->unlink(&loads
[f
]);
2022 for (Record
*r
= stores
[f
]; r
; r
= r
->next
)
2023 if (!st
|| r
->overlaps(st
))
2024 r
->unlink(&stores
[f
]);
2028 MemoryOpt::visit(BasicBlock
*bb
)
2030 bool ret
= runOpt(bb
);
2031 // Run again, one pass won't combine 4 32 bit ld/st to a single 128 bit ld/st
2032 // where 96 bit memory operations are forbidden.
2039 MemoryOpt::runOpt(BasicBlock
*bb
)
2041 Instruction
*ldst
, *next
;
2043 bool isAdjacent
= true;
2045 for (ldst
= bb
->getEntry(); ldst
; ldst
= next
) {
2050 if (ldst
->op
== OP_LOAD
|| ldst
->op
== OP_VFETCH
) {
2051 if (ldst
->isDead()) {
2052 // might have been produced by earlier optimization
2053 delete_Instruction(prog
, ldst
);
2057 if (ldst
->op
== OP_STORE
|| ldst
->op
== OP_EXPORT
) {
2060 // TODO: maybe have all fixed ops act as barrier ?
2061 if (ldst
->op
== OP_CALL
||
2062 ldst
->op
== OP_BAR
||
2063 ldst
->op
== OP_MEMBAR
) {
2064 purgeRecords(NULL
, FILE_MEMORY_LOCAL
);
2065 purgeRecords(NULL
, FILE_MEMORY_GLOBAL
);
2066 purgeRecords(NULL
, FILE_MEMORY_SHARED
);
2067 purgeRecords(NULL
, FILE_SHADER_OUTPUT
);
2069 if (ldst
->op
== OP_ATOM
|| ldst
->op
== OP_CCTL
) {
2070 if (ldst
->src(0).getFile() == FILE_MEMORY_GLOBAL
) {
2071 purgeRecords(NULL
, FILE_MEMORY_LOCAL
);
2072 purgeRecords(NULL
, FILE_MEMORY_GLOBAL
);
2073 purgeRecords(NULL
, FILE_MEMORY_SHARED
);
2075 purgeRecords(NULL
, ldst
->src(0).getFile());
2078 if (ldst
->op
== OP_EMIT
|| ldst
->op
== OP_RESTART
) {
2079 purgeRecords(NULL
, FILE_SHADER_OUTPUT
);
2083 if (ldst
->getPredicate()) // TODO: handle predicated ld/st
2087 DataFile file
= ldst
->src(0).getFile();
2089 // if ld l[]/g[] look for previous store to eliminate the reload
2090 if (file
== FILE_MEMORY_GLOBAL
|| file
== FILE_MEMORY_LOCAL
) {
2091 // TODO: shared memory ?
2092 rec
= findRecord(ldst
, false, isAdjacent
);
2093 if (rec
&& !isAdjacent
)
2094 keep
= !replaceLdFromSt(ldst
, rec
);
2097 // or look for ld from the same location and replace this one
2098 rec
= keep
? findRecord(ldst
, true, isAdjacent
) : NULL
;
2101 keep
= !replaceLdFromLd(ldst
, rec
);
2103 // or combine a previous load with this one
2104 keep
= !combineLd(rec
, ldst
);
2109 rec
= findRecord(ldst
, false, isAdjacent
);
2112 keep
= !replaceStFromSt(ldst
, rec
);
2114 keep
= !combineSt(rec
, ldst
);
2117 purgeRecords(ldst
, DATA_FILE_COUNT
);
2127 // =============================================================================
2129 // Turn control flow into predicated instructions (after register allocation !).
2131 // Could move this to before register allocation on NVC0 and also handle nested
2133 class FlatteningPass
: public Pass
2136 virtual bool visit(BasicBlock
*);
2138 bool tryPredicateConditional(BasicBlock
*);
2139 void predicateInstructions(BasicBlock
*, Value
*pred
, CondCode cc
);
2140 void tryPropagateBranch(BasicBlock
*);
2141 inline bool isConstantCondition(Value
*pred
);
2142 inline bool mayPredicate(const Instruction
*, const Value
*pred
) const;
2143 inline void removeFlow(Instruction
*);
2147 FlatteningPass::isConstantCondition(Value
*pred
)
2149 Instruction
*insn
= pred
->getUniqueInsn();
2151 if (insn
->op
!= OP_SET
|| insn
->srcExists(2))
2154 for (int s
= 0; s
< 2 && insn
->srcExists(s
); ++s
) {
2155 Instruction
*ld
= insn
->getSrc(s
)->getUniqueInsn();
2158 if (ld
->op
!= OP_MOV
&& ld
->op
!= OP_LOAD
)
2160 if (ld
->src(0).isIndirect(0))
2162 file
= ld
->src(0).getFile();
2164 file
= insn
->src(s
).getFile();
2165 // catch $r63 on NVC0
2166 if (file
== FILE_GPR
&& insn
->getSrc(s
)->reg
.data
.id
> prog
->maxGPR
)
2167 file
= FILE_IMMEDIATE
;
2169 if (file
!= FILE_IMMEDIATE
&& file
!= FILE_MEMORY_CONST
)
2176 FlatteningPass::removeFlow(Instruction
*insn
)
2178 FlowInstruction
*term
= insn
? insn
->asFlow() : NULL
;
2181 Graph::Edge::Type ty
= term
->bb
->cfg
.outgoing().getType();
2183 if (term
->op
== OP_BRA
) {
2184 // TODO: this might get more difficult when we get arbitrary BRAs
2185 if (ty
== Graph::Edge::CROSS
|| ty
== Graph::Edge::BACK
)
2188 if (term
->op
!= OP_JOIN
)
2191 Value
*pred
= term
->getPredicate();
2193 delete_Instruction(prog
, term
);
2195 if (pred
&& pred
->refCount() == 0) {
2196 Instruction
*pSet
= pred
->getUniqueInsn();
2197 pred
->join
->reg
.data
.id
= -1; // deallocate
2199 delete_Instruction(prog
, pSet
);
2204 FlatteningPass::predicateInstructions(BasicBlock
*bb
, Value
*pred
, CondCode cc
)
2206 for (Instruction
*i
= bb
->getEntry(); i
; i
= i
->next
) {
2209 assert(!i
->getPredicate());
2210 i
->setPredicate(cc
, pred
);
2212 removeFlow(bb
->getExit());
2216 FlatteningPass::mayPredicate(const Instruction
*insn
, const Value
*pred
) const
2218 if (insn
->isPseudo())
2220 // TODO: calls where we don't know which registers are modified
2222 if (!prog
->getTarget()->mayPredicate(insn
, pred
))
2224 for (int d
= 0; insn
->defExists(d
); ++d
)
2225 if (insn
->getDef(d
)->equals(pred
))
2230 // If we jump to BRA/RET/EXIT, replace the jump with it.
2231 // NOTE: We do not update the CFG anymore here !
2233 // TODO: Handle cases where we skip over a branch (maybe do that elsewhere ?):
2235 // @p0 bra BB:2 -> @!p0 bra BB:3 iff (!) BB:2 immediately adjoins BB:1
2243 FlatteningPass::tryPropagateBranch(BasicBlock
*bb
)
2245 for (Instruction
*i
= bb
->getExit(); i
&& i
->op
== OP_BRA
; i
= i
->prev
) {
2246 BasicBlock
*bf
= i
->asFlow()->target
.bb
;
2248 if (bf
->getInsnCount() != 1)
2251 FlowInstruction
*bra
= i
->asFlow();
2252 FlowInstruction
*rep
= bf
->getExit()->asFlow();
2254 if (!rep
|| rep
->getPredicate())
2256 if (rep
->op
!= OP_BRA
&&
2257 rep
->op
!= OP_JOIN
&&
2261 // TODO: If there are multiple branches to @rep, only the first would
2262 // be replaced, so only remove them after this pass is done ?
2263 // Also, need to check all incident blocks for fall-through exits and
2264 // add the branch there.
2266 bra
->target
.bb
= rep
->target
.bb
;
2267 if (bf
->cfg
.incidentCount() == 1)
2273 FlatteningPass::visit(BasicBlock
*bb
)
2275 if (tryPredicateConditional(bb
))
2278 // try to attach join to previous instruction
2279 if (prog
->getTarget()->hasJoin
) {
2280 Instruction
*insn
= bb
->getExit();
2281 if (insn
&& insn
->op
== OP_JOIN
&& !insn
->getPredicate()) {
2283 if (insn
&& !insn
->getPredicate() &&
2285 insn
->op
!= OP_TEXBAR
&&
2286 !isTextureOp(insn
->op
) && // probably just nve4
2287 !isSurfaceOp(insn
->op
) && // not confirmed
2288 insn
->op
!= OP_LINTERP
&& // probably just nve4
2289 insn
->op
!= OP_PINTERP
&& // probably just nve4
2290 ((insn
->op
!= OP_LOAD
&& insn
->op
!= OP_STORE
) ||
2291 (typeSizeof(insn
->dType
) <= 4 && !insn
->src(0).isIndirect(0))) &&
2294 bb
->remove(bb
->getExit());
2300 tryPropagateBranch(bb
);
2306 FlatteningPass::tryPredicateConditional(BasicBlock
*bb
)
2308 BasicBlock
*bL
= NULL
, *bR
= NULL
;
2309 unsigned int nL
= 0, nR
= 0, limit
= 12;
2313 mask
= bb
->initiatesSimpleConditional();
2317 assert(bb
->getExit());
2318 Value
*pred
= bb
->getExit()->getPredicate();
2321 if (isConstantCondition(pred
))
2324 Graph::EdgeIterator ei
= bb
->cfg
.outgoing();
2327 bL
= BasicBlock::get(ei
.getNode());
2328 for (insn
= bL
->getEntry(); insn
; insn
= insn
->next
, ++nL
)
2329 if (!mayPredicate(insn
, pred
))
2332 return false; // too long, do a real branch
2337 bR
= BasicBlock::get(ei
.getNode());
2338 for (insn
= bR
->getEntry(); insn
; insn
= insn
->next
, ++nR
)
2339 if (!mayPredicate(insn
, pred
))
2342 return false; // too long, do a real branch
2346 predicateInstructions(bL
, pred
, bb
->getExit()->cc
);
2348 predicateInstructions(bR
, pred
, inverseCondCode(bb
->getExit()->cc
));
2351 bb
->remove(bb
->joinAt
);
2354 removeFlow(bb
->getExit()); // delete the branch/join at the fork point
2356 // remove potential join operations at the end of the conditional
2357 if (prog
->getTarget()->joinAnterior
) {
2358 bb
= BasicBlock::get((bL
? bL
: bR
)->cfg
.outgoing().getNode());
2359 if (bb
->getEntry() && bb
->getEntry()->op
== OP_JOIN
)
2360 removeFlow(bb
->getEntry());
2366 // =============================================================================
2368 // Fold Immediate into MAD; must be done after register allocation due to
2369 // constraint SDST == SSRC2
2371 // Does NVC0+ have other situations where this pass makes sense?
2372 class NV50PostRaConstantFolding
: public Pass
2375 virtual bool visit(BasicBlock
*);
2379 NV50PostRaConstantFolding::visit(BasicBlock
*bb
)
2384 for (Instruction
*i
= bb
->getFirst(); i
; i
= i
->next
) {
2387 if (i
->def(0).getFile() != FILE_GPR
||
2388 i
->src(0).getFile() != FILE_GPR
||
2389 i
->src(1).getFile() != FILE_GPR
||
2390 i
->src(2).getFile() != FILE_GPR
||
2391 i
->getDef(0)->reg
.data
.id
!= i
->getSrc(2)->reg
.data
.id
||
2392 !isFloatType(i
->dType
))
2395 def
= i
->getSrc(1)->getInsn();
2396 if (def
->op
== OP_MOV
&& def
->src(0).getFile() == FILE_IMMEDIATE
) {
2397 vtmp
= i
->getSrc(1);
2398 i
->setSrc(1, def
->getSrc(0));
2400 /* There's no post-RA dead code elimination, so do it here
2401 * XXX: if we add more code-removing post-RA passes, we might
2402 * want to create a post-RA dead-code elim pass */
2403 if (vtmp
->refCount() == 0)
2404 delete_Instruction(bb
->getProgram(), def
);
2417 // =============================================================================
2419 // Common subexpression elimination. Stupid O^2 implementation.
2420 class LocalCSE
: public Pass
2423 virtual bool visit(BasicBlock
*);
2425 inline bool tryReplace(Instruction
**, Instruction
*);
2427 DLList ops
[OP_LAST
+ 1];
2430 class GlobalCSE
: public Pass
2433 virtual bool visit(BasicBlock
*);
2437 Instruction::isActionEqual(const Instruction
*that
) const
2439 if (this->op
!= that
->op
||
2440 this->dType
!= that
->dType
||
2441 this->sType
!= that
->sType
)
2443 if (this->cc
!= that
->cc
)
2446 if (this->asTex()) {
2447 if (memcmp(&this->asTex()->tex
,
2448 &that
->asTex()->tex
,
2449 sizeof(this->asTex()->tex
)))
2452 if (this->asCmp()) {
2453 if (this->asCmp()->setCond
!= that
->asCmp()->setCond
)
2456 if (this->asFlow()) {
2459 if (this->ipa
!= that
->ipa
||
2460 this->lanes
!= that
->lanes
||
2461 this->perPatch
!= that
->perPatch
)
2463 if (this->postFactor
!= that
->postFactor
)
2467 if (this->subOp
!= that
->subOp
||
2468 this->saturate
!= that
->saturate
||
2469 this->rnd
!= that
->rnd
||
2470 this->ftz
!= that
->ftz
||
2471 this->dnz
!= that
->dnz
||
2472 this->cache
!= that
->cache
||
2473 this->mask
!= that
->mask
)
2480 Instruction::isResultEqual(const Instruction
*that
) const
2484 // NOTE: location of discard only affects tex with liveOnly and quadops
2485 if (!this->defExists(0) && this->op
!= OP_DISCARD
)
2488 if (!isActionEqual(that
))
2491 if (this->predSrc
!= that
->predSrc
)
2494 for (d
= 0; this->defExists(d
); ++d
) {
2495 if (!that
->defExists(d
) ||
2496 !this->getDef(d
)->equals(that
->getDef(d
), false))
2499 if (that
->defExists(d
))
2502 for (s
= 0; this->srcExists(s
); ++s
) {
2503 if (!that
->srcExists(s
))
2505 if (this->src(s
).mod
!= that
->src(s
).mod
)
2507 if (!this->getSrc(s
)->equals(that
->getSrc(s
), true))
2510 if (that
->srcExists(s
))
2513 if (op
== OP_LOAD
|| op
== OP_VFETCH
) {
2514 switch (src(0).getFile()) {
2515 case FILE_MEMORY_CONST
:
2516 case FILE_SHADER_INPUT
:
2526 // pull through common expressions from different in-blocks
2528 GlobalCSE::visit(BasicBlock
*bb
)
2530 Instruction
*phi
, *next
, *ik
;
2533 // TODO: maybe do this with OP_UNION, too
2535 for (phi
= bb
->getPhi(); phi
&& phi
->op
== OP_PHI
; phi
= next
) {
2537 if (phi
->getSrc(0)->refCount() > 1)
2539 ik
= phi
->getSrc(0)->getInsn();
2541 continue; // probably a function input
2542 for (s
= 1; phi
->srcExists(s
); ++s
) {
2543 if (phi
->getSrc(s
)->refCount() > 1)
2545 if (!phi
->getSrc(s
)->getInsn() ||
2546 !phi
->getSrc(s
)->getInsn()->isResultEqual(ik
))
2549 if (!phi
->srcExists(s
)) {
2550 Instruction
*entry
= bb
->getEntry();
2552 if (!entry
|| entry
->op
!= OP_JOIN
)
2555 bb
->insertAfter(entry
, ik
);
2556 ik
->setDef(0, phi
->getDef(0));
2557 delete_Instruction(prog
, phi
);
2565 LocalCSE::tryReplace(Instruction
**ptr
, Instruction
*i
)
2567 Instruction
*old
= *ptr
;
2569 // TODO: maybe relax this later (causes trouble with OP_UNION)
2570 if (i
->isPredicated())
2573 if (!old
->isResultEqual(i
))
2576 for (int d
= 0; old
->defExists(d
); ++d
)
2577 old
->def(d
).replace(i
->getDef(d
), false);
2578 delete_Instruction(prog
, old
);
2584 LocalCSE::visit(BasicBlock
*bb
)
2586 unsigned int replaced
;
2589 Instruction
*ir
, *next
;
2593 // will need to know the order of instructions
2595 for (ir
= bb
->getFirst(); ir
; ir
= ir
->next
)
2596 ir
->serial
= serial
++;
2598 for (ir
= bb
->getEntry(); ir
; ir
= next
) {
2605 ops
[ir
->op
].insert(ir
);
2609 for (s
= 0; ir
->srcExists(s
); ++s
)
2610 if (ir
->getSrc(s
)->asLValue())
2611 if (!src
|| ir
->getSrc(s
)->refCount() < src
->refCount())
2612 src
= ir
->getSrc(s
);
2615 for (Value::UseIterator it
= src
->uses
.begin();
2616 it
!= src
->uses
.end(); ++it
) {
2617 Instruction
*ik
= (*it
)->getInsn();
2618 if (ik
&& ik
->bb
== ir
->bb
&& ik
->serial
< ir
->serial
)
2619 if (tryReplace(&ir
, ik
))
2623 DLLIST_FOR_EACH(&ops
[ir
->op
], iter
)
2625 Instruction
*ik
= reinterpret_cast<Instruction
*>(iter
.get());
2626 if (tryReplace(&ir
, ik
))
2632 ops
[ir
->op
].insert(ir
);
2636 for (unsigned int i
= 0; i
<= OP_LAST
; ++i
)
2644 // =============================================================================
2646 // Remove computations of unused values.
2647 class DeadCodeElim
: public Pass
2650 bool buryAll(Program
*);
2653 virtual bool visit(BasicBlock
*);
2655 void checkSplitLoad(Instruction
*ld
); // for partially dead loads
2657 unsigned int deadCount
;
2661 DeadCodeElim::buryAll(Program
*prog
)
2665 if (!this->run(prog
, false, false))
2667 } while (deadCount
);
2673 DeadCodeElim::visit(BasicBlock
*bb
)
2677 for (Instruction
*i
= bb
->getFirst(); i
; i
= next
) {
2681 delete_Instruction(prog
, i
);
2683 if (i
->defExists(1) && (i
->op
== OP_VFETCH
|| i
->op
== OP_LOAD
)) {
2686 if (i
->defExists(0) && !i
->getDef(0)->refCount()) {
2687 if (i
->op
== OP_ATOM
||
2688 i
->op
== OP_SUREDP
||
2697 DeadCodeElim::checkSplitLoad(Instruction
*ld1
)
2699 Instruction
*ld2
= NULL
; // can get at most 2 loads
2702 int32_t addr1
, addr2
;
2703 int32_t size1
, size2
;
2705 uint32_t mask
= 0xffffffff;
2707 for (d
= 0; ld1
->defExists(d
); ++d
)
2708 if (!ld1
->getDef(d
)->refCount() && ld1
->getDef(d
)->reg
.data
.id
< 0)
2710 if (mask
== 0xffffffff)
2713 addr1
= ld1
->getSrc(0)->reg
.data
.offset
;
2716 for (d
= 0; ld1
->defExists(d
); ++d
) {
2717 if (mask
& (1 << d
)) {
2718 if (size1
&& (addr1
& 0x7))
2720 def1
[n1
] = ld1
->getDef(d
);
2721 size1
+= def1
[n1
++]->reg
.size
;
2724 addr1
+= ld1
->getDef(d
)->reg
.size
;
2729 for (addr2
= addr1
+ size1
; ld1
->defExists(d
); ++d
) {
2730 if (mask
& (1 << d
)) {
2731 def2
[n2
] = ld1
->getDef(d
);
2732 size2
+= def2
[n2
++]->reg
.size
;
2735 addr2
+= ld1
->getDef(d
)->reg
.size
;
2739 updateLdStOffset(ld1
, addr1
, func
);
2740 ld1
->setType(typeOfSize(size1
));
2741 for (d
= 0; d
< 4; ++d
)
2742 ld1
->setDef(d
, (d
< n1
) ? def1
[d
] : NULL
);
2747 ld2
= cloneShallow(func
, ld1
);
2748 updateLdStOffset(ld2
, addr2
, func
);
2749 ld2
->setType(typeOfSize(size2
));
2750 for (d
= 0; d
< 4; ++d
)
2751 ld2
->setDef(d
, (d
< n2
) ? def2
[d
] : NULL
);
2753 ld1
->bb
->insertAfter(ld1
, ld2
);
2756 // =============================================================================
2758 #define RUN_PASS(l, n, f) \
2759 if (level >= (l)) { \
2760 if (dbgFlags & NV50_IR_DEBUG_VERBOSE) \
2761 INFO("PEEPHOLE: %s\n", #n); \
2763 if (!pass.f(this)) \
2768 Program::optimizeSSA(int level
)
2770 RUN_PASS(1, DeadCodeElim
, buryAll
);
2771 RUN_PASS(1, CopyPropagation
, run
);
2772 RUN_PASS(1, MergeSplits
, run
);
2773 RUN_PASS(2, GlobalCSE
, run
);
2774 RUN_PASS(1, LocalCSE
, run
);
2775 RUN_PASS(2, AlgebraicOpt
, run
);
2776 RUN_PASS(2, ModifierFolding
, run
); // before load propagation -> less checks
2777 RUN_PASS(1, ConstantFolding
, foldAll
);
2778 RUN_PASS(1, LoadPropagation
, run
);
2779 RUN_PASS(2, MemoryOpt
, run
);
2780 RUN_PASS(2, LocalCSE
, run
);
2781 RUN_PASS(0, DeadCodeElim
, buryAll
);
2787 Program::optimizePostRA(int level
)
2789 RUN_PASS(2, FlatteningPass
, run
);
2790 if (getTarget()->getChipset() < 0xc0)
2791 RUN_PASS(2, NV50PostRaConstantFolding
, run
);