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rs6000: Retry tbegin. instructions that can fail intermittently

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The HTM tbegin. instruction can fail intermittently due to many reasons.
This can lead to htm-1.c FAILing from time to time.  The solution is to
allow retrying the instruction a few times before aborting.

2022-02-15  Peter Bergner  <bergner@linux.ibm.com>

gcc/testsuite/
	* gcc.target/powerpc/htm-1.c: Retry intermittent failing tbegins.
This commit is contained in:
Peter Bergner 2022-02-15 16:51:32 -06:00
parent e15425e899
commit 3d8d8e34f7
1 changed files with 8 additions and 1 deletions
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9
gcc/testsuite/gcc.target/powerpc/htm-1.c
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@ -12,14 +12,21 @@ main (void)
{
long i;
unsigned long mask = 0;
unsigned long retry_count = 0;
repeat:
if (__builtin_tbegin (0))
{
mask++;
retry_count = 0;
}
else
abort();
{
/* Retry a limited number of times before aborting. */
if (retry_count++ < 10)
goto repeat;
abort ();
}
if (mask == 1)
{