#include "util/u_debug.h"
#include "util/u_memory.h"
+#include "lp_bld_init.h"
#include "lp_bld_type.h"
#include "lp_bld_flow.h"
* be used elsewhere.
*/
LLVMBasicBlockRef
-lp_build_insert_new_block(LLVMBuilderRef builder, const char *name)
+lp_build_insert_new_block(struct gallivm_state *gallivm, const char *name)
{
LLVMBasicBlockRef current_block;
LLVMBasicBlockRef next_block;
LLVMBasicBlockRef new_block;
/* get current basic block */
- current_block = LLVMGetInsertBlock(builder);
+ current_block = LLVMGetInsertBlock(gallivm->builder);
/* check if there's another block after this one */
next_block = LLVMGetNextBasicBlock(current_block);
if (next_block) {
/* insert the new block before the next block */
- new_block = LLVMInsertBasicBlock(next_block, name);
+ new_block = LLVMInsertBasicBlockInContext(gallivm->context, next_block, name);
}
else {
/* append new block after current block */
LLVMValueRef function = LLVMGetBasicBlockParent(current_block);
- new_block = LLVMAppendBasicBlock(function, name);
+ new_block = LLVMAppendBasicBlockInContext(gallivm->context, function, name);
}
return new_block;
*/
void
lp_build_flow_skip_begin(struct lp_build_skip_context *skip,
- LLVMBuilderRef builder)
+ struct gallivm_state *gallivm)
{
- skip->builder = builder;
-
+ skip->gallivm = gallivm;
/* create new basic block */
- skip->block = lp_build_insert_new_block(skip->builder, "skip");
+ skip->block = lp_build_insert_new_block(gallivm, "skip");
}
{
LLVMBasicBlockRef new_block;
- new_block = lp_build_insert_new_block(skip->builder, "");
+ new_block = lp_build_insert_new_block(skip->gallivm, "");
/* if cond is true, goto skip->block, else goto new_block */
- LLVMBuildCondBr(skip->builder, cond, skip->block, new_block);
+ LLVMBuildCondBr(skip->gallivm->builder, cond, skip->block, new_block);
- LLVMPositionBuilderAtEnd(skip->builder, new_block);
+ LLVMPositionBuilderAtEnd(skip->gallivm->builder, new_block);
}
lp_build_flow_skip_end(struct lp_build_skip_context *skip)
{
/* goto block */
- LLVMBuildBr(skip->builder, skip->block);
- LLVMPositionBuilderAtEnd(skip->builder, skip->block);
+ LLVMBuildBr(skip->gallivm->builder, skip->block);
+ LLVMPositionBuilderAtEnd(skip->gallivm->builder, skip->block);
}
void
lp_build_mask_check(struct lp_build_mask_context *mask)
{
- LLVMBuilderRef builder = mask->skip.builder;
+ LLVMBuilderRef builder = mask->skip.gallivm->builder;
LLVMValueRef value;
LLVMValueRef cond;
value = lp_build_mask_value(mask);
+ /*
+ * XXX this doesn't quite generate the most efficient code possible, if
+ * the masks are vectors which have all bits set to the same value
+ * in each element.
+ * movmskps/pmovmskb would be more efficient to get the required value
+ * into ordinary reg (certainly with 8 floats).
+ * Not sure if llvm could figure that out on its own.
+ */
+
/* cond = (mask == 0) */
cond = LLVMBuildICmp(builder,
LLVMIntEQ,
*/
void
lp_build_mask_begin(struct lp_build_mask_context *mask,
- LLVMBuilderRef builder,
+ struct gallivm_state *gallivm,
struct lp_type type,
LLVMValueRef value)
{
memset(mask, 0, sizeof *mask);
- mask->reg_type = LLVMIntType(type.width * type.length);
- mask->var = lp_build_alloca(builder,
- lp_build_int_vec_type(type),
+ mask->reg_type = LLVMIntTypeInContext(gallivm->context, type.width * type.length);
+ mask->var = lp_build_alloca(gallivm,
+ lp_build_int_vec_type(gallivm, type),
"execution_mask");
- LLVMBuildStore(builder, value, mask->var);
+ LLVMBuildStore(gallivm->builder, value, mask->var);
- lp_build_flow_skip_begin(&mask->skip, builder);
+ lp_build_flow_skip_begin(&mask->skip, gallivm);
}
LLVMValueRef
lp_build_mask_value(struct lp_build_mask_context *mask)
{
- return LLVMBuildLoad(mask->skip.builder, mask->var, "");
+ return LLVMBuildLoad(mask->skip.gallivm->builder, mask->var, "");
}
/**
* Update boolean mask with given value (bitwise AND).
* Typically used to update the quad's pixel alive/killed mask
- * after depth testing, alpha testing, TGSI_OPCODE_KIL, etc.
+ * after depth testing, alpha testing, TGSI_OPCODE_KILL_IF, etc.
*/
void
lp_build_mask_update(struct lp_build_mask_context *mask,
LLVMValueRef value)
{
- value = LLVMBuildAnd(mask->skip.builder,
+ value = LLVMBuildAnd(mask->skip.gallivm->builder,
lp_build_mask_value(mask),
value, "");
- LLVMBuildStore(mask->skip.builder, value, mask->var);
+ LLVMBuildStore(mask->skip.gallivm->builder, value, mask->var);
}
void
-lp_build_loop_begin(LLVMBuilderRef builder,
- LLVMValueRef start,
- struct lp_build_loop_state *state)
+lp_build_loop_begin(struct lp_build_loop_state *state,
+ struct gallivm_state *gallivm,
+ LLVMValueRef start)
+
{
- state->block = lp_build_insert_new_block(builder, "loop_begin");
+ LLVMBuilderRef builder = gallivm->builder;
+
+ state->block = lp_build_insert_new_block(gallivm, "loop_begin");
- state->counter_var = lp_build_alloca(builder, LLVMTypeOf(start), "loop_counter");
+ state->counter_var = lp_build_alloca(gallivm, LLVMTypeOf(start), "loop_counter");
+ state->gallivm = gallivm;
LLVMBuildStore(builder, start, state->counter_var);
void
-lp_build_loop_end_cond(LLVMBuilderRef builder,
+lp_build_loop_end_cond(struct lp_build_loop_state *state,
LLVMValueRef end,
LLVMValueRef step,
- LLVMIntPredicate llvm_cond,
- struct lp_build_loop_state *state)
+ LLVMIntPredicate llvm_cond)
{
+ LLVMBuilderRef builder = state->gallivm->builder;
LLVMValueRef next;
LLVMValueRef cond;
LLVMBasicBlockRef after_block;
cond = LLVMBuildICmp(builder, llvm_cond, next, end, "");
- after_block = lp_build_insert_new_block(builder, "loop_end");
+ after_block = lp_build_insert_new_block(state->gallivm, "loop_end");
LLVMBuildCondBr(builder, cond, after_block, state->block);
state->counter = LLVMBuildLoad(builder, state->counter_var, "");
}
+void
+lp_build_loop_force_set_counter(struct lp_build_loop_state *state,
+ LLVMValueRef end)
+{
+ LLVMBuilderRef builder = state->gallivm->builder;
+ LLVMBuildStore(builder, end, state->counter_var);
+}
void
-lp_build_loop_end(LLVMBuilderRef builder,
+lp_build_loop_force_reload_counter(struct lp_build_loop_state *state)
+{
+ LLVMBuilderRef builder = state->gallivm->builder;
+ state->counter = LLVMBuildLoad(builder, state->counter_var, "");
+}
+
+void
+lp_build_loop_end(struct lp_build_loop_state *state,
LLVMValueRef end,
- LLVMValueRef step,
- struct lp_build_loop_state *state)
+ LLVMValueRef step)
{
- lp_build_loop_end_cond(builder, end, step, LLVMIntNE, state);
+ lp_build_loop_end_cond(state, end, step, LLVMIntNE);
+}
+
+/**
+ * Creates a c-style for loop,
+ * contrasts lp_build_loop as this checks condition on entry
+ * e.g. for(i = start; i cmp_op end; i += step)
+ * \param state the for loop state, initialized here
+ * \param gallivm the gallivm state
+ * \param start starting value of iterator
+ * \param cmp_op comparison operator used for comparing current value with end value
+ * \param end value used to compare against iterator
+ * \param step value added to iterator at end of each loop
+ */
+void
+lp_build_for_loop_begin(struct lp_build_for_loop_state *state,
+ struct gallivm_state *gallivm,
+ LLVMValueRef start,
+ LLVMIntPredicate cmp_op,
+ LLVMValueRef end,
+ LLVMValueRef step)
+{
+ LLVMBuilderRef builder = gallivm->builder;
+
+ assert(LLVMTypeOf(start) == LLVMTypeOf(end));
+ assert(LLVMTypeOf(start) == LLVMTypeOf(step));
+
+ state->begin = lp_build_insert_new_block(gallivm, "loop_begin");
+ state->step = step;
+ state->counter_var = lp_build_alloca(gallivm, LLVMTypeOf(start), "loop_counter");
+ state->gallivm = gallivm;
+ state->cond = cmp_op;
+ state->end = end;
+
+ LLVMBuildStore(builder, start, state->counter_var);
+ LLVMBuildBr(builder, state->begin);
+
+ LLVMPositionBuilderAtEnd(builder, state->begin);
+ state->counter = LLVMBuildLoad(builder, state->counter_var, "");
+
+ state->body = lp_build_insert_new_block(gallivm, "loop_body");
+ LLVMPositionBuilderAtEnd(builder, state->body);
}
+/**
+ * End the for loop.
+ */
+void
+lp_build_for_loop_end(struct lp_build_for_loop_state *state)
+{
+ LLVMValueRef next, cond;
+ LLVMBuilderRef builder = state->gallivm->builder;
+
+ next = LLVMBuildAdd(builder, state->counter, state->step, "");
+ LLVMBuildStore(builder, next, state->counter_var);
+ LLVMBuildBr(builder, state->begin);
+
+ state->exit = lp_build_insert_new_block(state->gallivm, "loop_exit");
+
+ /*
+ * We build the comparison for the begin block here,
+ * if we build it earlier the output llvm ir is not human readable
+ * as the code produced is not in the standard begin -> body -> end order.
+ */
+ LLVMPositionBuilderAtEnd(builder, state->begin);
+ cond = LLVMBuildICmp(builder, state->cond, state->counter, state->end, "");
+ LLVMBuildCondBr(builder, cond, state->body, state->exit);
+
+ LLVMPositionBuilderAtEnd(builder, state->exit);
+}
/*
*/
void
lp_build_if(struct lp_build_if_state *ifthen,
- LLVMBuilderRef builder,
+ struct gallivm_state *gallivm,
LLVMValueRef condition)
{
- LLVMBasicBlockRef block = LLVMGetInsertBlock(builder);
+ LLVMBasicBlockRef block = LLVMGetInsertBlock(gallivm->builder);
memset(ifthen, 0, sizeof *ifthen);
- ifthen->builder = builder;
+ ifthen->gallivm = gallivm;
ifthen->condition = condition;
ifthen->entry_block = block;
/* create endif/merge basic block for the phi functions */
- ifthen->merge_block = lp_build_insert_new_block(builder, "endif-block");
+ ifthen->merge_block = lp_build_insert_new_block(gallivm, "endif-block");
/* create/insert true_block before merge_block */
- ifthen->true_block = LLVMInsertBasicBlock(ifthen->merge_block, "if-true-block");
+ ifthen->true_block =
+ LLVMInsertBasicBlockInContext(gallivm->context,
+ ifthen->merge_block,
+ "if-true-block");
/* successive code goes into the true block */
- LLVMPositionBuilderAtEnd(builder, ifthen->true_block);
+ LLVMPositionBuilderAtEnd(gallivm->builder, ifthen->true_block);
}
void
lp_build_else(struct lp_build_if_state *ifthen)
{
+ LLVMBuilderRef builder = ifthen->gallivm->builder;
+
/* Append an unconditional Br(anch) instruction on the true_block */
- LLVMBuildBr(ifthen->builder, ifthen->merge_block);
+ LLVMBuildBr(builder, ifthen->merge_block);
/* create/insert false_block before the merge block */
- ifthen->false_block = LLVMInsertBasicBlock(ifthen->merge_block, "if-false-block");
+ ifthen->false_block =
+ LLVMInsertBasicBlockInContext(ifthen->gallivm->context,
+ ifthen->merge_block,
+ "if-false-block");
/* successive code goes into the else block */
- LLVMPositionBuilderAtEnd(ifthen->builder, ifthen->false_block);
+ LLVMPositionBuilderAtEnd(builder, ifthen->false_block);
}
void
lp_build_endif(struct lp_build_if_state *ifthen)
{
+ LLVMBuilderRef builder = ifthen->gallivm->builder;
+
/* Insert branch to the merge block from current block */
- LLVMBuildBr(ifthen->builder, ifthen->merge_block);
+ LLVMBuildBr(builder, ifthen->merge_block);
/*
* Now patch in the various branch instructions.
*/
/* Insert the conditional branch instruction at the end of entry_block */
- LLVMPositionBuilderAtEnd(ifthen->builder, ifthen->entry_block);
+ LLVMPositionBuilderAtEnd(builder, ifthen->entry_block);
if (ifthen->false_block) {
/* we have an else clause */
- LLVMBuildCondBr(ifthen->builder, ifthen->condition,
+ LLVMBuildCondBr(builder, ifthen->condition,
ifthen->true_block, ifthen->false_block);
}
else {
/* no else clause */
- LLVMBuildCondBr(ifthen->builder, ifthen->condition,
+ LLVMBuildCondBr(builder, ifthen->condition,
ifthen->true_block, ifthen->merge_block);
}
/* Resume building code at end of the ifthen->merge_block */
- LLVMPositionBuilderAtEnd(ifthen->builder, ifthen->merge_block);
+ LLVMPositionBuilderAtEnd(builder, ifthen->merge_block);
+}
+
+
+static LLVMBuilderRef
+create_builder_at_entry(struct gallivm_state *gallivm)
+{
+ LLVMBuilderRef builder = gallivm->builder;
+ LLVMBasicBlockRef current_block = LLVMGetInsertBlock(builder);
+ LLVMValueRef function = LLVMGetBasicBlockParent(current_block);
+ LLVMBasicBlockRef first_block = LLVMGetEntryBasicBlock(function);
+ LLVMValueRef first_instr = LLVMGetFirstInstruction(first_block);
+ LLVMBuilderRef first_builder = LLVMCreateBuilderInContext(gallivm->context);
+
+ if (first_instr) {
+ LLVMPositionBuilderBefore(first_builder, first_instr);
+ } else {
+ LLVMPositionBuilderAtEnd(first_builder, first_block);
+ }
+
+ return first_builder;
}
* - http://www.llvm.org/docs/tutorial/OCamlLangImpl7.html#memory
*/
LLVMValueRef
-lp_build_alloca(LLVMBuilderRef builder,
+lp_build_alloca(struct gallivm_state *gallivm,
LLVMTypeRef type,
const char *name)
{
- LLVMBasicBlockRef current_block = LLVMGetInsertBlock(builder);
- LLVMValueRef function = LLVMGetBasicBlockParent(current_block);
- LLVMBasicBlockRef first_block = LLVMGetEntryBasicBlock(function);
- LLVMValueRef first_instr = LLVMGetFirstInstruction(first_block);
- LLVMBuilderRef first_builder = LLVMCreateBuilder();
+ LLVMBuilderRef builder = gallivm->builder;
+ LLVMBuilderRef first_builder = create_builder_at_entry(gallivm);
LLVMValueRef res;
- if (first_instr) {
- LLVMPositionBuilderBefore(first_builder, first_instr);
- } else {
- LLVMPositionBuilderAtEnd(first_builder, first_block);
- }
-
res = LLVMBuildAlloca(first_builder, type, name);
LLVMBuildStore(builder, LLVMConstNull(type), res);
}
+/**
+ * Like lp_build_alloca, but do not zero-initialize the variable.
+ */
+LLVMValueRef
+lp_build_alloca_undef(struct gallivm_state *gallivm,
+ LLVMTypeRef type,
+ const char *name)
+{
+ LLVMBuilderRef first_builder = create_builder_at_entry(gallivm);
+ LLVMValueRef res;
+
+ res = LLVMBuildAlloca(first_builder, type, name);
+
+ LLVMDisposeBuilder(first_builder);
+
+ return res;
+}
+
+
/**
* Allocate an array of scalars/vectors.
*
* - http://www.llvm.org/docs/tutorial/OCamlLangImpl7.html#memory
*/
LLVMValueRef
-lp_build_array_alloca(LLVMBuilderRef builder,
+lp_build_array_alloca(struct gallivm_state *gallivm,
LLVMTypeRef type,
LLVMValueRef count,
const char *name)
{
- LLVMBasicBlockRef current_block = LLVMGetInsertBlock(builder);
- LLVMValueRef function = LLVMGetBasicBlockParent(current_block);
- LLVMBasicBlockRef first_block = LLVMGetEntryBasicBlock(function);
- LLVMValueRef first_instr = LLVMGetFirstInstruction(first_block);
- LLVMBuilderRef first_builder = LLVMCreateBuilder();
+ LLVMBuilderRef first_builder = create_builder_at_entry(gallivm);
LLVMValueRef res;
- if (first_instr) {
- LLVMPositionBuilderBefore(first_builder, first_instr);
- } else {
- LLVMPositionBuilderAtEnd(first_builder, first_block);
- }
-
res = LLVMBuildArrayAlloca(first_builder, type, count, name);
LLVMDisposeBuilder(first_builder);
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