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x86: Define __rdtsc and __rdtscp as macros

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Define __rdtsc and __rdtscp as macros for callers with general-regs-only
target attribute to avoid inline failure with always_inline attribute.

gcc/

	PR target/99744
	* config/i386/ia32intrin.h (__rdtsc): Defined as macro.
	(__rdtscp): Likewise.

gcc/testsuite/

	PR target/99744
	* gcc.target/i386/pr99744-1.c: New test.
This commit is contained in:
H.J. Lu 2021-03-23 20:04:58 -07:00
parent 9c68e2abe2
commit 5463cee277
2 changed files with 27 additions and 12 deletions
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14
gcc/config/i386/ia32intrin.h
View File

@ -107,22 +107,12 @@ __rdpmc (int __S)
#endif /* __iamcu__ */
/* rdtsc */
extern __inline unsigned long long
__attribute__((__gnu_inline__, __always_inline__, __artificial__))
__rdtsc (void)
{
return __builtin_ia32_rdtsc ();
}
#define __rdtsc() __builtin_ia32_rdtsc ()
#ifndef __iamcu__
/* rdtscp */
extern __inline unsigned long long
__attribute__((__gnu_inline__, __always_inline__, __artificial__))
__rdtscp (unsigned int *__A)
{
return __builtin_ia32_rdtscp (__A);
}
#define __rdtscp(a) __builtin_ia32_rdtscp (a)
#endif /* __iamcu__ */

25
gcc/testsuite/gcc.target/i386/pr99744-1.c Normal file
View File

@ -0,0 +1,25 @@
/* { dg-do compile } */
/* { dg-options "-O0" } */
#include <x86intrin.h>
extern unsigned long long int curr_deadline;
extern void bar (void);
__attribute__ ((target("general-regs-only")))
void
foo1 (void)
{
if (__rdtsc () < curr_deadline)
return;
bar ();
}
__attribute__ ((target("general-regs-only")))
void
foo2 (unsigned int *p)
{
if (__rdtscp (p) < curr_deadline)
return;
bar ();
}