* [PATCH] Adjust testcase for more optimal codegen.
@ 2023-08-01 5:44 liuhongt
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From: liuhongt @ 2023-08-01 5:44 UTC (permalink / raw)
To: gcc-patches; +Cc: crazylht, hjl.tools
After
b9d7140c80bd3c7355b8291bb46f0895dcd8c3cb is the first bad commit
commit b9d7140c80bd3c7355b8291bb46f0895dcd8c3cb
Author: Jan Hubicka <jh@suse.cz>
Date: Fri Jul 28 09:16:09 2023 +0200
loop-split improvements, part 1
Now we have
vpbroadcastd %ecx, %xmm0
vpaddd .LC3(%rip), %xmm0, %xmm0
vpextrd $3, %xmm0, %eax
vmovddup %xmm3, %xmm0
vrndscalepd $9, %xmm0, %xmm0
vunpckhpd %xmm0, %xmm0, %xmm3
for vrndscalepd, no need to insert pxor since it reuses input register
xmm0 to avoid partial sse dependece.
Pushed to trunk.
gcc/testsuite/ChangeLog:
* gcc.target/i386/pr87007-4.c: Adjust testcase.
* gcc.target/i386/pr87007-5.c: Ditto.
---
gcc/testsuite/gcc.target/i386/pr87007-4.c | 6 +++---
gcc/testsuite/gcc.target/i386/pr87007-5.c | 6 +++---
2 files changed, 6 insertions(+), 6 deletions(-)
diff --git a/gcc/testsuite/gcc.target/i386/pr87007-4.c b/gcc/testsuite/gcc.target/i386/pr87007-4.c
index e91bdcbac44..23b5c5dcc52 100644
--- a/gcc/testsuite/gcc.target/i386/pr87007-4.c
+++ b/gcc/testsuite/gcc.target/i386/pr87007-4.c
@@ -1,6 +1,6 @@
/* { dg-do compile } */
-/* { dg-options "-Ofast -march=skylake-avx512 -mfpmath=sse" } */
-
+/* { dg-options "-O2 -march=skylake-avx512 -mfpmath=sse" } */
+/* Load of d2/d3 is hoisted out, vrndscalesd will reuse loades register to avoid partial dependence. */
#include<math.h>
@@ -15,4 +15,4 @@ foo (int n, int k)
d1 = ceil (d3);
}
-/* { dg-final { scan-assembler-times "vxorps\[^\n\r\]*xmm\[0-9\]" 1 } } */
+/* { dg-final { scan-assembler-times "vxorps\[^\n\r\]*xmm\[0-9\]" 0 } } */
diff --git a/gcc/testsuite/gcc.target/i386/pr87007-5.c b/gcc/testsuite/gcc.target/i386/pr87007-5.c
index 20d13cf650b..b0b0a7b70ef 100644
--- a/gcc/testsuite/gcc.target/i386/pr87007-5.c
+++ b/gcc/testsuite/gcc.target/i386/pr87007-5.c
@@ -1,6 +1,6 @@
/* { dg-do compile } */
-/* { dg-options "-Ofast -march=skylake-avx512 -mfpmath=sse" } */
-
+/* { dg-options "-O2 -march=skylake-avx512 -mfpmath=sse" } */
+/* Load of d2/d3 is hoisted out, vrndscalesd will reuse loades register to avoid partial dependence. */
#include<math.h>
@@ -15,4 +15,4 @@ foo (int n, int k)
d1 = sqrt (d3);
}
-/* { dg-final { scan-assembler-times "vxorps\[^\n\r\]*xmm\[0-9\]" 1 } } */
+/* { dg-final { scan-assembler-times "vxorps\[^\n\r\]*xmm\[0-9\]" 0 } } */
--
2.39.1.388.g2fc9e9ca3c
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2023-08-01 5:44 [PATCH] Adjust testcase for more optimal codegen liuhongt
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