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| author | liuhongt <hongtao.liu@intel.com> | 2020-09-16 10:53:52 +0800 |
|---|---|---|
| committer | liuhongt <hongtao.liu@intel.com> | 2020-09-19 22:54:02 +0800 |
| commit | 83858ba1db31cd83667592a41d71315090459da4 (patch) | |
| tree | f4b28811d485217ade77c18334af09b1f51bd819 /gcc | |
| parent | 239601c53b03880832193f34c799d20fd2c5fe70 (diff) | |
| download | gcc-83858ba1db31cd83667592a41d71315090459da4.zip gcc-83858ba1db31cd83667592a41d71315090459da4.tar.gz gcc-83858ba1db31cd83667592a41d71315090459da4.tar.bz2 | |
Increase rtx cost of sse_to_integer in skylake_cost.
As https://gcc.gnu.org/pipermail/gcc-patches/2019-August/528839.html
indicates, movement between SSE and gpr should be much expensive than
movement inside gpr(which is 2 as default).
gcc/ChangeLog
PR target/96861
* config/i386/x86-tune-costs.h (skylake_cost): increase rtx
cost of sse_to_integer from 2 to 6.
gcc/testsuite
* gcc.target/i386/pr95021-3.c: Add -mtune=generic.
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/config/i386/x86-tune-costs.h | 2 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/i386/pr95021-3.c | 2 |
2 files changed, 2 insertions, 2 deletions
diff --git a/gcc/config/i386/x86-tune-costs.h b/gcc/config/i386/x86-tune-costs.h index 0ad4b28..5de4149 100644 --- a/gcc/config/i386/x86-tune-costs.h +++ b/gcc/config/i386/x86-tune-costs.h @@ -1769,7 +1769,7 @@ struct processor_costs skylake_cost = { {6, 6, 6, 10, 20}, /* cost of unaligned loads. */ {8, 8, 8, 8, 16}, /* cost of unaligned stores. */ 2, 2, 4, /* cost of moving XMM,YMM,ZMM register */ - 2, /* cost of moving SSE register to integer. */ + 6, /* cost of moving SSE register to integer. */ 20, 8, /* Gather load static, per_elt. */ 22, 10, /* Gather store static, per_elt. */ 64, /* size of l1 cache. */ diff --git a/gcc/testsuite/gcc.target/i386/pr95021-3.c b/gcc/testsuite/gcc.target/i386/pr95021-3.c index 1748161..52f9e45 100644 --- a/gcc/testsuite/gcc.target/i386/pr95021-3.c +++ b/gcc/testsuite/gcc.target/i386/pr95021-3.c @@ -1,5 +1,5 @@ /* { dg-do compile { target ia32 } } */ -/* { dg-options "-O2 -msse2 -mstv -mregparm=3 -W" } */ +/* { dg-options "-O2 -msse2 -mstv -mregparm=3 -W -mtune=generic" } */ /* { dg-final { scan-assembler "movq\[ \t\]+\[^\n\]*, %xmm" } } */ #include "pr95021-1.c" |