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| author | Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> | 2003-09-06 19:05:02 +0200 |
|---|---|---|
| committer | Zdenek Dvorak <rakdver@gcc.gnu.org> | 2003-09-06 17:05:02 +0000 |
| commit | bad998e07ea294d3b712b99bce845139c21ecc7c (patch) | |
| tree | a6ad10b6cf328517181ef962e2f5fee9f25f9bb6 | |
| parent | 34ff26738c101dfa4a8dd25aecd3719f4481824a (diff) | |
| download | gcc-bad998e07ea294d3b712b99bce845139c21ecc7c.zip gcc-bad998e07ea294d3b712b99bce845139c21ecc7c.tar.gz gcc-bad998e07ea294d3b712b99bce845139c21ecc7c.tar.bz2 | |
gcse.c (expr_equiv_p): Don't consider anything to be equal to volatile mem.
* gcse.c (expr_equiv_p): Don't consider anything to be equal to
volatile mem.
From-SVN: r71140
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/gcse.c | 4 |
2 files changed, 9 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 521a44a..1657512 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2003-09-06 Zdenek Dvorak <rakdver@atrey.karlin.mff.cuni.cz> + + * gcse.c (expr_equiv_p): Don't consider anything to be equal to + volatile mem. + 2003-09-06 Kaveh R. Ghazi <ghazi@caip.rutgers.edu> * ggc-common.c (init_ggc_heuristics): Don't use the heuristics @@ -1787,6 +1787,10 @@ expr_equiv_p (rtx x, rtx y) due to it being set with the different alias set. */ if (MEM_ALIAS_SET (x) != MEM_ALIAS_SET (y)) return 0; + + /* A volatile mem should not be considered equivalent to any other. */ + if (MEM_VOLATILE_P (x) || MEM_VOLATILE_P (y)) + return 0; break; /* For commutative operations, check both orders. */ |