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Don't force_reg operands[3] when it's not const0_rtx.

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It fix the regression by

a51f2fc0d8 is the first bad commit
commit a51f2fc0d8
Author: liuhongt <hongtao.liu@intel.com>
Date:   Wed Sep 4 15:39:17 2024 +0800

    Handle const0_operand for *avx2_pcmp<mode>3_1.

caused

FAIL: gcc.target/i386/pr59539-1.c scan-assembler-times vmovdqu|vmovups 1

To reproduce:

$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr59539-1.c --target_board='unix{-m32\ -march=cascadelake}'"
$ cd {build_dir}/gcc && make check RUNTESTFLAGS="i386.exp=gcc.target/i386/pr59539-1.c --target_board='unix{-m64\ -march=cascadelake}'"

gcc/ChangeLog:

	* config/i386/sse.md (*avx2_pcmp<mode>3_1): Don't force_reg
	operands[3] when it's not const0_rtx.
This commit is contained in:
liuhongt 2024-09-06 15:03:16 +08:00
parent 852cff8268
commit c726a66431
1 changed files with 2 additions and 1 deletions
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gcc/config/i386/sse.md
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@ -17929,6 +17929,7 @@
if (INTVAL (operands[5]) == 1)
std::swap (operands[3], operands[4]);
if (operands[3] == CONST0_RTX (<MODE>mode))
operands[3] = force_reg (<MODE>mode, operands[3]);
if (operands[4] == CONST0_RTX (<MODE>mode))
operands[4] = force_reg (<MODE>mode, operands[4]);