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| author | H.J. Lu <hjl.tools@gmail.com> | 2021-01-08 05:20:19 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2021-01-08 06:46:04 -0800 |
| commit | 76be18f442948d1a4bc49a7d670b07097f9e5983 (patch) | |
| tree | d4d5c53ce81ccdec74ab8805cc9f6c5bf9f959d7 | |
| parent | 77a375a3ebf822914c19835ac690c67694c70bd0 (diff) | |
| download | gcc-76be18f442948d1a4bc49a7d670b07097f9e5983.zip gcc-76be18f442948d1a4bc49a7d670b07097f9e5983.tar.gz gcc-76be18f442948d1a4bc49a7d670b07097f9e5983.tar.bz2 | |
x86-64: Use R10 and R11 for profiling large model with PIC
For NO_PROFILE_COUNTERS targets, R11 is a scratch register. We can use
R10 and R11 to call mcount in large model with PIC.
gcc/
PR target/98482
* config/i386/i386.c (x86_function_profiler): Use R10 and R11
to call mcount in large model with PIC for NO_PROFILE_COUNTERS
targets.
gcc/testsuite/
PR target/98482
* gcc.target/i386/pr98482-2.c: Updated.
| -rw-r--r-- | gcc/config/i386/i386.c | 12 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.target/i386/pr98482-2.c | 3 |
2 files changed, 12 insertions, 3 deletions
diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index d306846..d35af37 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -20806,12 +20806,20 @@ x86_function_profiler (FILE *file, int labelno ATTRIBUTE_UNUSED) mcount_name); break; case CM_LARGE_PIC: +#ifdef NO_PROFILE_COUNTERS + fprintf (file, "1:\tmovabsq\t$_GLOBAL_OFFSET_TABLE_-1b, %%r11\n"); + fprintf (file, "\tleaq\t1b(%%rip), %%r10\n"); + fprintf (file, "\taddq\t%%r11, %%r10\n"); + fprintf (file, "\tmovabsq\t$%s@PLTOFF, %%r11\n", mcount_name); + fprintf (file, "\taddq\t%%r11, %%r10\n"); + fprintf (file, "\tcall\t*%%r10\n"); +#else sorry ("profiling %<-mcmodel=large%> with PIC is not supported"); +#endif break; case CM_SMALL_PIC: case CM_MEDIUM_PIC: - fprintf (file, "1:\tcall\t*%s@GOTPCREL(%%rip)\n", - mcount_name); + fprintf (file, "1:\tcall\t*%s@GOTPCREL(%%rip)\n", mcount_name); break; default: x86_print_call_or_nop (file, mcount_name); diff --git a/gcc/testsuite/gcc.target/i386/pr98482-2.c b/gcc/testsuite/gcc.target/i386/pr98482-2.c index aed3ca4..0ee142d 100644 --- a/gcc/testsuite/gcc.target/i386/pr98482-2.c +++ b/gcc/testsuite/gcc.target/i386/pr98482-2.c @@ -2,8 +2,9 @@ /* { dg-require-effective-target mfentry } */ /* { dg-require-effective-target fpic } */ /* { dg-options "-fpic -fprofile -mfentry -O2 -mcmodel=large" } */ +/* { dg-final { scan-assembler "movabsq\t\\\$__fentry__@PLTOFF, %r11\n\taddq\t%r11, %r10\n\tcall\t\\*%r10" } } */ void func (void) { -} /* { dg-message "sorry, unimplemented: profiling '-mcmodel=large' with PIC is not supported" } */ +} |