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i386.md (cmpstrnsi): Remove dead code.

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* config/i386/i386.md (cmpstrnsi): Remove dead code.

From-SVN: r272474
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Uros Bizjak 2019-06-19 16:38:58 +02:00 committed by Uros Bizjak
parent 25403c416e
commit 7a907deeeb
2 changed files with 13 additions and 17 deletions
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4
gcc/ChangeLog
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@ -1,3 +1,7 @@
2019-06-19 Uroš Bizjak <ubizjak@gmail.com>
* config/i386/i386.md (cmpstrnsi): Remove dead code.
2019-06-19 Wilco Dijkstra <wdijkstr@arm.com>
PR middle-end/84521

26
gcc/config/i386/i386.md
View File

@ -17004,7 +17004,7 @@
(use (match_operand 4 "immediate_operand"))]
""
{
rtx addr1, addr2, out, outlow, count, countreg, align;
rtx addr1, addr2, countreg, align, out;
if (optimize_insn_for_size_p () && !TARGET_INLINE_ALL_STRINGOPS)
FAIL;
@ -17028,10 +17028,6 @@
&& TREE_CODE (TREE_OPERAND (TREE_OPERAND (t2, 0), 0)) == STRING_CST)))
FAIL;
out = operands[0];
if (!REG_P (out))
out = gen_reg_rtx (SImode);
addr1 = copy_addr_to_reg (XEXP (operands[1], 0));
addr2 = copy_addr_to_reg (XEXP (operands[2], 0));
if (addr1 != XEXP (operands[1], 0))
@ -17039,17 +17035,16 @@
if (addr2 != XEXP (operands[2], 0))
operands[2] = replace_equiv_address_nv (operands[2], addr2);
count = operands[3];
countreg = ix86_zero_extend_to_Pmode (count);
countreg = ix86_zero_extend_to_Pmode (operands[3]);
/* %%% Iff we are testing strict equality, we can use known alignment
to good advantage. This may be possible with combine, particularly
once cc0 is dead. */
align = operands[4];
if (CONST_INT_P (count))
if (CONST_INT_P (operands[3]))
{
if (INTVAL (count) == 0)
if (operands[3] == const0_rtx)
{
emit_move_insn (operands[0], const0_rtx);
DONE;
@ -17064,12 +17059,9 @@
operands[1], operands[2]));
}
outlow = gen_lowpart (QImode, out);
emit_insn (gen_cmpintqi (outlow));
emit_move_insn (out, gen_rtx_SIGN_EXTEND (SImode, outlow));
if (operands[0] != out)
emit_move_insn (operands[0], out);
out = gen_lowpart (QImode, operands[0]);
emit_insn (gen_cmpintqi (out));
emit_move_insn (operands[0], gen_rtx_SIGN_EXTEND (SImode, out));
DONE;
})
@ -19320,7 +19312,7 @@
(match_operand:SI 2 "const_int_operand"))]
"TARGET_3DNOW || TARGET_PREFETCH_SSE || TARGET_PRFCHW || TARGET_PREFETCHWT1"
{
bool write = INTVAL (operands[1]) != 0;
bool write = operands[1] != const0_rtx;
int locality = INTVAL (operands[2]);
gcc_assert (IN_RANGE (locality, 0, 3));
@ -19385,7 +19377,7 @@
(const_int 3))]
"TARGET_3DNOW || TARGET_PRFCHW || TARGET_PREFETCHWT1"
{
if (INTVAL (operands[1]) == 0)
if (operands[1] == const0_rtx)
return "prefetch\t%a0";
else
return "prefetchw\t%a0";