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| author | Richard Kenner <kenner@gcc.gnu.org> | 1993-04-26 19:12:11 -0400 |
|---|---|---|
| committer | Richard Kenner <kenner@gcc.gnu.org> | 1993-04-26 19:12:11 -0400 |
| commit | b8a914304da6ad15c03f90850858f97969809e95 (patch) | |
| tree | c7b18f0e8e7f545675ce7ef8972dd3da7b9a1ac4 /gcc | |
| parent | 3975f288c6896a87d5522912bdf29ec744e48e28 (diff) | |
| download | gcc-b8a914304da6ad15c03f90850858f97969809e95.zip gcc-b8a914304da6ad15c03f90850858f97969809e95.tar.gz gcc-b8a914304da6ad15c03f90850858f97969809e95.tar.bz2 | |
(fold): Signedness matters for comparisons and right shifts.
From-SVN: r4243
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/fold-const.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/gcc/fold-const.c b/gcc/fold-const.c index 43995c6..5845489 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -3040,8 +3040,17 @@ fold (expr) if (op == 0) continue; /* Valid for CALL_EXPR, at least. */ - /* Strip any conversions that don't change the mode. */ - STRIP_NOPS (op); + if (kind == '<' || code == RSHIFT_EXPR) + { + /* Signedness matters here. Perhaps we can refine this + later. */ + STRIP_TYPE_NOPS (op); + } + else + { + /* Strip any conversions that don't change the mode. */ + STRIP_NOPS (op); + } if (TREE_CODE (op) == COMPLEX_CST) subop = TREE_REALPART (op); |