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re PR target/63354 (gcc -pg -mprofile-kernel creates unused stack frames on leaf functions on ppc64le) 

[gcc]

2016-01-21  Anton Blanchard  <anton@samba.org>
	    Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR target/63354
	* config/rs6000/linux64.h (TARGET_KEEP_LEAF_WHEN_PROFILED): New
	#define.
	* config/rs6000/rs6000.c (rs6000_keep_leaf_when_profiled): New
	function.

[gcc/testsuite]

2016-01-21  Anton Blanchard  <anton@samba.org>
	    Bill Schmidt  <wschmidt@linux.vnet.ibm.com>

	PR target/63354
	* gcc.target/powerpc/pr63354.c:  New test.


Co-Authored-By: Bill Schmidt <wschmidt@linux.vnet.ibm.com>

From-SVN: r232684
This commit is contained in:
Anton Blanchard 2016-01-21 17:32:28 +00:00 committed by William Schmidt
parent b638c908a7
commit c8d3e08887
5 changed files with 37 additions and 0 deletions
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9
gcc/ChangeLog
View File

@ -1,3 +1,12 @@
2016-01-21 Anton Blanchard <anton@samba.org>
Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/63354
* config/rs6000/linux64.h (TARGET_KEEP_LEAF_WHEN_PROFILED): New
#define.
* config/rs6000/rs6000.c (rs6000_keep_leaf_when_profiled): New
function.
2016-01-21 Ajit Agarwal <ajitkum@xilinx.com>
* config/microblaze/microblaze.c

3
gcc/config/rs6000/linux64.h
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@ -59,6 +59,9 @@ extern int dot_symbols;
#define TARGET_PROFILE_KERNEL profile_kernel
#undef TARGET_KEEP_LEAF_WHEN_PROFILED
#define TARGET_KEEP_LEAF_WHEN_PROFILED rs6000_keep_leaf_when_profiled
#define TARGET_USES_LINUX64_OPT 1
#ifdef HAVE_LD_LARGE_TOC
#undef TARGET_CMODEL

8
gcc/config/rs6000/rs6000.c
View File

@ -26237,6 +26237,14 @@ rs6000_output_function_prologue (FILE *file,
rs6000_pic_labelno++;
}
/* -mprofile-kernel code calls mcount before the function prolog,
so a profiled leaf function should stay a leaf function. */
static bool
rs6000_keep_leaf_when_profiled ()
{
return TARGET_PROFILE_KERNEL;
}
/* Non-zero if vmx regs are restored before the frame pop, zero if
we restore after the pop when possible. */
#define ALWAYS_RESTORE_ALTIVEC_BEFORE_POP 0

6
gcc/testsuite/ChangeLog
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@ -1,3 +1,9 @@
2016-01-21 Anton Blanchard <anton@samba.org>
Bill Schmidt <wschmidt@linux.vnet.ibm.com>
PR target/63354
* gcc.target/powerpc/pr63354.c: New test.
2016-01-21 Vladimir Makarov <vmakarov@redhat.com>
PR rtl-optimization/68990

11
gcc/testsuite/gcc.target/powerpc/pr63354.c Normal file
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@ -0,0 +1,11 @@
/* Verify that we don't stack a frame for leaf functions when using
-pg -mprofile-kernel. */
/* { dg-do compile { target { powerpc64*-*-* } } } */
/* { dg-options "-O2 -pg -mprofile-kernel" } */
/* { dg-final { scan-assembler-not "mtlr" } } */
int foo(void)
{
return 1;
}