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re PR target/64180 (PowerPC carry bit improvements)

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PR target/64180
	* config/rs6000/rs6000.c (TARGET_MD_ASM_CLOBBERS): Define.
	(rs6000_md_asm_clobbers): New function.

From-SVN: r218589
This commit is contained in:
Segher Boessenkool 2014-12-10 19:28:57 +01:00 committed by Segher Boessenkool
parent 29df5715c0
commit 7b7817713f
2 changed files with 22 additions and 0 deletions
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6
gcc/ChangeLog
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@ -1,3 +1,9 @@
2014-12-10 Segher Boessenkool <segher@kernel.crashing.org>
PR target/64180
* config/rs6000/rs6000.c (TARGET_MD_ASM_CLOBBERS): Define.
(rs6000_md_asm_clobbers): New function.
2014-12-10 Felix Yang <felix.yang@huawei.com>
* config/aarch64/aarch64-protos.h (aarch64_function_profiler): Remove

16
gcc/config/rs6000/rs6000.c
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@ -1556,6 +1556,9 @@ static const struct attribute_spec rs6000_attribute_table[] =
#undef TARGET_ASM_LOOP_ALIGN_MAX_SKIP
#define TARGET_ASM_LOOP_ALIGN_MAX_SKIP rs6000_loop_align_max_skip
#undef TARGET_MD_ASM_CLOBBERS
#define TARGET_MD_ASM_CLOBBERS rs6000_md_asm_clobbers
#undef TARGET_OPTION_OVERRIDE
#define TARGET_OPTION_OVERRIDE rs6000_option_override
@ -3146,6 +3149,19 @@ rs6000_builtin_mask_calculate (void)
| ((TARGET_LONG_DOUBLE_128) ? RS6000_BTM_LDBL128 : 0));
}
/* Implement TARGET_MD_ASM_CLOBBERS. All asm statements are considered
to clobber the XER[CA] bit because clobbering that bit without telling
the compiler worked just fine with versions of GCC before GCC 5, and
breaking a lot of older code in ways that are hard to track down is
not such a great idea. */
static tree
rs6000_md_asm_clobbers (tree, tree, tree clobbers)
{
tree s = build_string (strlen (reg_names[CA_REGNO]), reg_names[CA_REGNO]);
return tree_cons (NULL_TREE, s, clobbers);
}
/* Override command line options. Mostly we process the processor type and
sometimes adjust other TARGET_ options. */