From 76be18f442948d1a4bc49a7d670b07097f9e5983 Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Fri, 8 Jan 2021 05:20:19 -0800 Subject: [PATCH] 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. --- gcc/config/i386/i386.c | 12 ++++++++++-- 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 d3068462fcd..d35af37a49c 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 aed3ca4b6ff..0ee142db12c 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" } */ +} -- 2.30.2