--- /dev/null
+From 228efbbb2f1d59ca7fc0ec09d4be75ce58fa583b Mon Sep 17 00:00:00 2001
+From: Claudiu Zissulescu <claziss@gmail.com>
+Date: Mon, 1 Apr 2019 13:03:55 +0300
+Subject: [PATCH] [ARC] PR89838
+
+gcc/
+xxxx-xx-xx Claudiu Zissulescu <claziss@synopsys.com>
+
+ * config/arc/arc.c (arc_symbol_binds_local_p): New function.
+ (arc_legitimize_pic_address): Simplify and cleanup the function.
+ (SYMBOLIC_CONST): Remove.
+ (prepare_pic_move): Likewise.
+ (prepare_move_operands): Handle complex mov cases here.
+ (arc_legitimize_address_0): Remove call to
+ arc_legitimize_pic_address.
+ (arc_legitimize_address): Remove call to
+ arc_legitimize_tls_address.
+ * config/arc/arc.md (movqi_insn): Allow Cm3 match.
+ (movhi_insn): Likewise.
+
+/gcc/testsuite
+xxxx-xx-xx Claudiu Zissulescu <claziss@synopsys.com>
+
+ * gcc.target/arc/pr89838.c: New file.
+
+Fix in upstream:
+ https://gcc.gnu.org/viewcvs/gcc?view=revision&sortby=date&revision=272645
+
+Signed-off-by: Evgeniy Didin <didin@synopsys.com>
+---
+ gcc/config/arc/arc.c | 246 ++++++++++--------------------------------
+ gcc/config/arc/arc.md | 8 +-
+ 2 files changed, 60 insertions(+), 194 deletions(-)
+
+diff --git a/gcc/config/arc/arc.c b/gcc/config/arc/arc.c
+index 78a37aa2a18..8b544efaa11 100644
+--- a/gcc/config/arc/arc.c
++++ b/gcc/config/arc/arc.c
+@@ -5990,137 +5990,46 @@ arc_legitimize_tls_address (rtx addr, enum tls_model model)
+ }
+ }
+
+-/* Legitimize a pic address reference in ORIG.
+- The return value is the legitimated address.
+- If OLDX is non-zero, it is the target to assign the address to first. */
++/* Return true if SYMBOL_REF X binds locally. */
+
+-static rtx
+-arc_legitimize_pic_address (rtx orig, rtx oldx)
++static bool
++arc_symbol_binds_local_p (const_rtx x)
+ {
+- rtx addr = orig;
+- rtx pat = orig;
+- rtx base;
++ return (SYMBOL_REF_DECL (x)
++ ? targetm.binds_local_p (SYMBOL_REF_DECL (x))
++ : SYMBOL_REF_LOCAL_P (x));
++}
+
+- if (oldx == orig)
+- oldx = NULL;
++/* Legitimize a pic address reference in ORIG. The return value is
++ the legitimated address. */
++
++static rtx
++arc_legitimize_pic_address (rtx addr)
++{
++ if (!flag_pic)
++ return addr;
+
+- if (GET_CODE (addr) == LABEL_REF)
+- ; /* Do nothing. */
+- else if (GET_CODE (addr) == SYMBOL_REF)
++ switch (GET_CODE (addr))
+ {
+- enum tls_model model = SYMBOL_REF_TLS_MODEL (addr);
+- if (model != 0)
+- return arc_legitimize_tls_address (addr, model);
+- else if (!flag_pic)
+- return orig;
+- else if (CONSTANT_POOL_ADDRESS_P (addr) || SYMBOL_REF_LOCAL_P (addr))
+- return arc_unspec_offset (addr, ARC_UNSPEC_GOTOFFPC);
++ case SYMBOL_REF:
++ /* TLS symbols are handled in different place. */
++ if (SYMBOL_REF_TLS_MODEL (addr))
++ return addr;
+
+ /* This symbol must be referenced via a load from the Global
+ Offset Table (@GOTPC). */
+- pat = arc_unspec_offset (addr, ARC_UNSPEC_GOT);
+- pat = gen_const_mem (Pmode, pat);
++ if (!arc_symbol_binds_local_p (addr))
++ return gen_const_mem (Pmode, arc_unspec_offset (addr, ARC_UNSPEC_GOT));
+
+- if (oldx == NULL)
+- oldx = gen_reg_rtx (Pmode);
+-
+- emit_move_insn (oldx, pat);
+- pat = oldx;
+- }
+- else
+- {
+- if (GET_CODE (addr) == CONST)
+- {
+- addr = XEXP (addr, 0);
+- if (GET_CODE (addr) == UNSPEC)
+- {
+- /* Check that the unspec is one of the ones we generate? */
+- return orig;
+- }
+- /* fwprop is placing in the REG_EQUIV notes constant pic
+- unspecs expressions. Then, loop may use these notes for
+- optimizations resulting in complex patterns that are not
+- supported by the current implementation. The following
+- two if-cases are simplifying the complex patters to
+- simpler ones. */
+- else if (GET_CODE (addr) == MINUS)
+- {
+- rtx op0 = XEXP (addr, 0);
+- rtx op1 = XEXP (addr, 1);
+- gcc_assert (oldx);
+- gcc_assert (GET_CODE (op1) == UNSPEC);
+-
+- emit_move_insn (oldx,
+- gen_rtx_CONST (SImode,
+- arc_legitimize_pic_address (op1,
+- NULL_RTX)));
+- emit_insn (gen_rtx_SET (oldx, gen_rtx_MINUS (SImode, op0, oldx)));
+- return oldx;
+-
+- }
+- else if (GET_CODE (addr) != PLUS)
+- {
+- rtx tmp = XEXP (addr, 0);
+- enum rtx_code code = GET_CODE (addr);
+-
+- /* It only works for UNARY operations. */
+- gcc_assert (UNARY_P (addr));
+- gcc_assert (GET_CODE (tmp) == UNSPEC);
+- gcc_assert (oldx);
+-
+- emit_move_insn
+- (oldx,
+- gen_rtx_CONST (SImode,
+- arc_legitimize_pic_address (tmp,
+- NULL_RTX)));
+-
+- emit_insn (gen_rtx_SET (oldx,
+- gen_rtx_fmt_ee (code, SImode,
+- oldx, const0_rtx)));
+-
+- return oldx;
+- }
+- else
+- {
+- gcc_assert (GET_CODE (addr) == PLUS);
+- if (GET_CODE (XEXP (addr, 0)) == UNSPEC)
+- return orig;
+- }
+- }
+-
+- if (GET_CODE (addr) == PLUS)
+- {
+- rtx op0 = XEXP (addr, 0), op1 = XEXP (addr, 1);
+-
+- base = arc_legitimize_pic_address (op0, oldx);
+- pat = arc_legitimize_pic_address (op1,
+- base == oldx ? NULL_RTX : oldx);
+-
+- if (base == op0 && pat == op1)
+- return orig;
+-
+- if (GET_CODE (base) == PLUS)
+- {
+- gcc_assert (oldx != NULL_RTX);
+- gcc_assert (REG_P (oldx));
+- emit_insn (gen_rtx_SET (oldx, base));
+- base = oldx;
+- }
+- if (GET_CODE (pat) == CONST_INT)
+- pat = plus_constant (Pmode, base, INTVAL (pat));
+- else
+- {
+- if (GET_CODE (pat) == PLUS && CONSTANT_P (XEXP (pat, 1)))
+- {
+- base = gen_rtx_PLUS (Pmode, base, XEXP (pat, 0));
+- pat = XEXP (pat, 1);
+- }
+- pat = gen_rtx_PLUS (Pmode, base, pat);
+- }
+- }
++ /* Local symb: use @pcl to access it. */
++ /* Fall through. */
++ case LABEL_REF:
++ return arc_unspec_offset (addr, ARC_UNSPEC_GOTOFFPC);
++ default:
++ break;
+ }
+
+- return pat;
++ return addr;
+ }
+
+ /* Output address constant X to FILE, taking PIC into account. */
+@@ -6282,28 +6191,6 @@ arc_output_pic_addr_const (FILE * file, rtx x, int code)
+ }
+ }
+
+-#define SYMBOLIC_CONST(X) \
+-(GET_CODE (X) == SYMBOL_REF \
+- || GET_CODE (X) == LABEL_REF \
+- || (GET_CODE (X) == CONST && symbolic_reference_mentioned_p (X)))
+-
+-/* Emit insns to move operands[1] into operands[0]. */
+-
+-static void
+-prepare_pic_move (rtx *operands, machine_mode)
+-{
+- if (GET_CODE (operands[0]) == MEM && SYMBOLIC_CONST (operands[1])
+- && flag_pic)
+- operands[1] = force_reg (Pmode, operands[1]);
+- else
+- {
+- rtx temp = (reload_in_progress ? operands[0]
+- : gen_reg_rtx (Pmode));
+- operands[1] = arc_legitimize_pic_address (operands[1], temp);
+- }
+-}
+-
+-
+ /* The function returning the number of words, at the beginning of an
+ argument, must be put in registers. The returned value must be
+ zero for arguments that are passed entirely in registers or that
+@@ -9178,54 +9065,37 @@ prepare_move_operands (rtx *operands, machine_mode mode)
+ }
+ }
+
+- if (mode == SImode && SYMBOLIC_CONST (operands[1]))
++ if (GET_CODE (operands[1]) == SYMBOL_REF)
+ {
+- prepare_pic_move (operands, SImode);
+-
+- /* Disable any REG_EQUALs associated with the symref
+- otherwise the optimization pass undoes the work done
+- here and references the variable directly. */
++ enum tls_model model = SYMBOL_REF_TLS_MODEL (operands[1]);
++ if (MEM_P (operands[0]) && flag_pic)
++ operands[1] = force_reg (mode, operands[1]);
++ else if (model)
++ operands[1] = arc_legitimize_tls_address (operands[1], model);
+ }
+
++ operands[1] = arc_legitimize_pic_address (operands[1]);
++
++ /* Store instructions are limited, they only accept as address an
++ immediate, a register or a register plus a small immediate. */
+ if (MEM_P (operands[0])
+- && !(reload_in_progress || reload_completed))
++ && !move_dest_operand (operands[0], mode))
+ {
+- operands[1] = force_reg (mode, operands[1]);
+- if (!move_dest_operand (operands[0], mode))
+- {
+- rtx addr = copy_to_mode_reg (Pmode, XEXP (operands[0], 0));
+- /* This is like change_address_1 (operands[0], mode, 0, 1) ,
+- except that we can't use that function because it is static. */
+- rtx pat = change_address (operands[0], mode, addr);
+- MEM_COPY_ATTRIBUTES (pat, operands[0]);
+- operands[0] = pat;
+- }
+- if (!cse_not_expected)
+- {
+- rtx pat = XEXP (operands[0], 0);
+-
+- pat = arc_legitimize_address_0 (pat, pat, mode);
+- if (pat)
+- {
+- pat = change_address (operands[0], mode, pat);
+- MEM_COPY_ATTRIBUTES (pat, operands[0]);
+- operands[0] = pat;
+- }
+- }
++ rtx tmp0 = copy_to_mode_reg (Pmode, XEXP (operands[0], 0));
++ rtx tmp1 = change_address (operands[0], mode, tmp0);
++ MEM_COPY_ATTRIBUTES (tmp1, operands[0]);
++ operands[0] = tmp1;
+ }
+
+- if (MEM_P (operands[1]) && !cse_not_expected)
+- {
+- rtx pat = XEXP (operands[1], 0);
+-
+- pat = arc_legitimize_address_0 (pat, pat, mode);
+- if (pat)
+- {
+- pat = change_address (operands[1], mode, pat);
+- MEM_COPY_ATTRIBUTES (pat, operands[1]);
+- operands[1] = pat;
+- }
+- }
++ /* Check if it is constant but it is not legitimized. */
++ if (CONSTANT_P (operands[1])
++ && !arc_legitimate_constant_p (mode, operands[1]))
++ operands[1] = force_reg (mode, XEXP (operands[1], 0));
++ else if (MEM_P (operands[0])
++ && ((CONSTANT_P (operands[1])
++ && !satisfies_constraint_Cm3 (operands[1]))
++ || MEM_P (operands[1])))
++ operands[1] = force_reg (mode, operands[1]);
+
+ return false;
+ }
+@@ -9630,11 +9500,10 @@ arc_legitimize_address_0 (rtx x, rtx oldx ATTRIBUTE_UNUSED,
+ {
+ rtx addr, inner;
+
+- if (flag_pic && SYMBOLIC_CONST (x))
+- (x) = arc_legitimize_pic_address (x, 0);
+ addr = x;
+ if (GET_CODE (addr) == CONST)
+ addr = XEXP (addr, 0);
++
+ if (GET_CODE (addr) == PLUS
+ && CONST_INT_P (XEXP (addr, 1))
+ && ((GET_CODE (XEXP (addr, 0)) == SYMBOL_REF
+@@ -9665,13 +9534,6 @@ arc_legitimize_address_0 (rtx x, rtx oldx ATTRIBUTE_UNUSED,
+ static rtx
+ arc_legitimize_address (rtx orig_x, rtx oldx, machine_mode mode)
+ {
+- if (GET_CODE (orig_x) == SYMBOL_REF)
+- {
+- enum tls_model model = SYMBOL_REF_TLS_MODEL (orig_x);
+- if (model != 0)
+- return arc_legitimize_tls_address (orig_x, model);
+- }
+-
+ rtx new_x = arc_legitimize_address_0 (orig_x, oldx, mode);
+
+ if (new_x)
+diff --git a/gcc/config/arc/arc.md b/gcc/config/arc/arc.md
+index a7c5c600a99..dc5bcc0bb14 100644
+--- a/gcc/config/arc/arc.md
++++ b/gcc/config/arc/arc.md
+@@ -682,7 +682,9 @@ archs4x, archs4xd"
+ [(set (match_operand:QI 0 "move_dest_operand" "=Rcq,Rcq#q, w,Rcq#q, h, w, w,???w,h, w,Rcq, S,!*x, r,r, Ucm,m,???m, m,Usc")
+ (match_operand:QI 1 "move_src_operand" " cL, cP,Rcq#q, P,hCm1,cL, I,?Rac,i,?i, T,Rcq,Usd,Ucm,m,?Rac,c,?Rac,Cm3,i"))]
+ "register_operand (operands[0], QImode)
+- || register_operand (operands[1], QImode)"
++ || register_operand (operands[1], QImode)
++ || (satisfies_constraint_Cm3 (operands[1])
++ && memory_operand (operands[0], QImode))"
+ "@
+ mov%? %0,%1%&
+ mov%? %0,%1%&
+@@ -724,7 +726,9 @@ archs4x, archs4xd"
+ /* Don't use a LIMM that we could load with a single insn - we loose
+ delay-slot filling opportunities. */
+ && !satisfies_constraint_I (operands[1])
+- && satisfies_constraint_Usc (operands[0]))"
++ && satisfies_constraint_Usc (operands[0]))
++ || (satisfies_constraint_Cm3 (operands[1])
++ && memory_operand (operands[0], HImode))"
+ "@
+ mov%? %0,%1%&
+ mov%? %0,%1%&
+--
+2.17.2
+
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