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i386: Change prefetchi output template

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For prefetchi instructions, RIP-relative address is explicitly mentioned
for operand and assembler obeys that rule strictly. This makes
instruction like:

	prefetchit0	bar

got illegal for assembler, which should be a broad usage for prefetchi.

Change to %a to explicitly add (%rip) after function label to make it
legal in assembler so that it could pass to linker to get the real address.

gcc/ChangeLog:

	* config/i386/i386.md (prefetchi): Change to %a.

gcc/testsuite/ChangeLog:

	* gcc.target/i386/prefetchi-1.c: Check (%rip).
This commit is contained in:
Haochen Jiang 2024-07-22 14:06:18 +08:00
parent 109b389a0b
commit 81f356f9f7
2 changed files with 3 additions and 3 deletions
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2
gcc/config/i386/i386.md
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@ -27142,7 +27142,7 @@
"TARGET_PREFETCHI && TARGET_64BIT"
{
static const char * const patterns[2] = {
"prefetchit1\t%0", "prefetchit0\t%0"
"prefetchit1\t%a0", "prefetchit0\t%a0"
};
int locality = INTVAL (operands[1]);

4
gcc/testsuite/gcc.target/i386/prefetchi-1.c
View file

@ -1,7 +1,7 @@
/* { dg-do compile { target { ! ia32 } } } */
/* { dg-options "-mprefetchi -O2" } */
/* { dg-final { scan-assembler-times "\[ \\t\]+prefetchit0\[ \\t\]+" 2 } } */
/* { dg-final { scan-assembler-times "\[ \\t\]+prefetchit1\[ \\t\]+" 2 } } */
/* { dg-final { scan-assembler-times "\[ \\t\]+prefetchit0\[ \\t\]+bar\\(%rip\\)" 2 } } */
/* { dg-final { scan-assembler-times "\[ \\t\]+prefetchit1\[ \\t\]+bar\\(%rip\\)" 2 } } */
#include <x86intrin.h>