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| author | Richard Stallman <rms@gnu.org> | 1993-05-14 19:00:45 +0000 |
|---|---|---|
| committer | Richard Stallman <rms@gnu.org> | 1993-05-14 19:00:45 +0000 |
| commit | b4bf13a89e99e8bd7fa60c9813003467db60d365 (patch) | |
| tree | 35a54228606508c2fe9e96d235985d6ca86b2f02 /gcc | |
| parent | 517f954609e08162835cdf711745c23c8fae67f6 (diff) | |
| download | gcc-b4bf13a89e99e8bd7fa60c9813003467db60d365.zip gcc-b4bf13a89e99e8bd7fa60c9813003467db60d365.tar.gz gcc-b4bf13a89e99e8bd7fa60c9813003467db60d365.tar.bz2 | |
(expand_decl): Don't set RTX_UNCHANGING_P.
From-SVN: r4457
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/stmt.c | 7 |
1 files changed, 7 insertions, 0 deletions
@@ -2995,8 +2995,15 @@ expand_decl (decl) if (TREE_THIS_VOLATILE (decl)) MEM_VOLATILE_P (DECL_RTL (decl)) = 1; +#if 0 /* A variable is not necessarily unchanging + just because it is const. RTX_UNCHANGING_P + means no change in the function, + not merely no change in the variable's scope. + It is correct to set RTX_UNCHANGING_P if the variable's scope + is the whole function. There's no convenient way to test that. */ if (TREE_READONLY (decl)) RTX_UNCHANGING_P (DECL_RTL (decl)) = 1; +#endif /* If doing stupid register allocation, make sure life of any register variable starts here, at the start of its scope. */ |