From c726a6643125a59e2ba6f992924a2d0098104578 Mon Sep 17 00:00:00 2001
From: liuhongt <hongtao.liu@intel.com>
Date: Fri, 6 Sep 2024 15:03:16 +0800
Subject: [PATCH] Don't force_reg operands[3] when it's not const0_rtx.
It fix the regression by
a51f2fc0d80869ab079a93cc3858f24a1fd28237 is the first bad commit
commit a51f2fc0d80869ab079a93cc3858f24a1fd28237
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.
---
gcc/config/i386/sse.md | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)
diff --git a/gcc/config/i386/sse.md b/gcc/config/i386/sse.md
index 1946d3513be1..1ae61182d0cc 100644
--- a/gcc/config/i386/sse.md
+++ b/gcc/config/i386/sse.md
@@ -17929,7 +17929,8 @@
if (INTVAL (operands[5]) == 1)
std::swap (operands[3], operands[4]);
- operands[3] = force_reg (<MODE>mode, operands[3]);
+ 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]);
--
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