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| author | Jakub Jelinek <jakub@redhat.com> | 2014-01-09 21:12:36 +0100 |
|---|---|---|
| committer | Jakub Jelinek <jakub@gcc.gnu.org> | 2014-01-09 21:12:36 +0100 |
| commit | 3396aba5384e904199530f8efea4c1eaaab51605 (patch) | |
| tree | 8aa86e6cd0afa95c4caa85d417ffe6d223a72f61 /gcc/cfgexpand.c | |
| parent | a70e9985fdc020e89eace3d72108606c47150fc5 (diff) | |
| download | gcc-3396aba5384e904199530f8efea4c1eaaab51605.zip gcc-3396aba5384e904199530f8efea4c1eaaab51605.tar.gz gcc-3396aba5384e904199530f8efea4c1eaaab51605.tar.bz2 | |
re PR middle-end/47735 (Unnecessary adjustments to stack pointer)
PR middle-end/47735
* cfgexpand.c (expand_one_var): For SSA_NAMEs, if the underlying
var satisfies use_register_for_decl, just take into account type
alignment, rather than decl alignment.
* gcc.target/i386/pr47735.c: New test.
From-SVN: r206493
Diffstat (limited to 'gcc/cfgexpand.c')
| -rw-r--r-- | gcc/cfgexpand.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/gcc/cfgexpand.c b/gcc/cfgexpand.c index 5f14d81..c0cbeb3 100644 --- a/gcc/cfgexpand.c +++ b/gcc/cfgexpand.c @@ -1215,8 +1215,11 @@ expand_one_var (tree var, bool toplevel, bool really_expand) we conservatively assume it will be on stack even if VAR is eventually put into register after RA pass. For non-automatic variables, which won't be on stack, we collect alignment of - type and ignore user specified alignment. */ - if (TREE_STATIC (var) || DECL_EXTERNAL (var)) + type and ignore user specified alignment. Similarly for + SSA_NAMEs for which use_register_for_decl returns true. */ + if (TREE_STATIC (var) + || DECL_EXTERNAL (var) + || (TREE_CODE (origvar) == SSA_NAME && use_register_for_decl (var))) align = MINIMUM_ALIGNMENT (TREE_TYPE (var), TYPE_MODE (TREE_TYPE (var)), TYPE_ALIGN (TREE_TYPE (var))); |