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| author | Andrew Haley <aph@redhat.com> | 2002-11-05 14:32:24 +0000 |
|---|---|---|
| committer | Andrew Haley <aph@gcc.gnu.org> | 2002-11-05 14:32:24 +0000 |
| commit | 5c7cd6636da2ffa19df7094f396362b6c8b35153 (patch) | |
| tree | 186141225e3e26e2247c4d66e3760aa63e53a38c | |
| parent | 97ab11755d8d6d19e35bbf0b50e25a543722d8f4 (diff) | |
| download | gcc-5c7cd6636da2ffa19df7094f396362b6c8b35153.zip gcc-5c7cd6636da2ffa19df7094f396362b6c8b35153.tar.gz gcc-5c7cd6636da2ffa19df7094f396362b6c8b35153.tar.bz2 | |
fold-const.c (fold): Don't transform (a0 op compound(a1,a2)) to (compound(a1,a0 op a2)) if...
2002-11-05 Andrew Haley <aph@redhat.com>
* fold-const.c (fold): Don't transform (a0 op compound(a1,a2))
to (compound(a1,a0 op a2)) if a0 or a1 have side effects.
From-SVN: r58822
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/fold-const.c | 4 |
2 files changed, 8 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index ff854be..31010ab 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2002-11-05 Andrew Haley <aph@redhat.com> + + * fold-const.c (fold): Don't transform (a0 op compound(a1,a2)) + to (compound(a1,a0 op a2)) if a0 or a1 have side effects. + 2002-11-05 Richard Sandiford <rsandifo@redhat.com> * config/mips/mips.h (CANNOT_CHANGE_MODE_CLASS): Move comment to... diff --git a/gcc/fold-const.c b/gcc/fold-const.c index c08d44e..c4095e4 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -4783,7 +4783,9 @@ fold (expr) else if (TREE_CODE_CLASS (code) == '2' || TREE_CODE_CLASS (code) == '<') { - if (TREE_CODE (arg1) == COMPOUND_EXPR) + if (TREE_CODE (arg1) == COMPOUND_EXPR + && ! TREE_SIDE_EFFECTS (TREE_OPERAND (arg1, 0)) + && ! TREE_SIDE_EFFECTS (arg0)) return build (COMPOUND_EXPR, type, TREE_OPERAND (arg1, 0), fold (build (code, type, arg0, TREE_OPERAND (arg1, 1)))); |