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| author | Richard Guenther <rguenther@suse.de> | 2011-07-07 14:21:21 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2011-07-07 14:21:21 +0000 |
| commit | bbc210abb5bc5dc9961f05af2187cfa7170d9916 (patch) | |
| tree | 40cc7c59a7cb5207d4d46c9ee4d1811e68774391 | |
| parent | 29c5134ac901bba223eb66866cd4be7d30194dc3 (diff) | |
| download | gcc-bbc210abb5bc5dc9961f05af2187cfa7170d9916.zip gcc-bbc210abb5bc5dc9961f05af2187cfa7170d9916.tar.gz gcc-bbc210abb5bc5dc9961f05af2187cfa7170d9916.tar.bz2 | |
fold-const.c (fold_unary_loc): Do not strip sign-changes for NEGATE_EXPR.
2011-07-07 Richard Guenther <rguenther@suse.de>
* fold-const.c (fold_unary_loc): Do not strip sign-changes
for NEGATE_EXPR.
* gcc.dg/ftrapv-3.c: New testcase.
From-SVN: r175976
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/fold-const.c | 2 | ||||
| -rw-r--r-- | gcc/testsuite/ChangeLog | 4 | ||||
| -rw-r--r-- | gcc/testsuite/gcc.dg/ftrapv-3.c | 16 |
4 files changed, 26 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index f3b7c11..7a7c0ec 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,10 @@ 2011-07-07 Richard Guenther <rguenther@suse.de> + * fold-const.c (fold_unary_loc): Do not strip sign-changes + for NEGATE_EXPR. + +2011-07-07 Richard Guenther <rguenther@suse.de> + * tree-vrp.c (simplify_conversion_using_ranges): New function. (simplify_stmt_using_ranges): Call it. diff --git a/gcc/fold-const.c b/gcc/fold-const.c index e48aae9..44a8b6f 100644 --- a/gcc/fold-const.c +++ b/gcc/fold-const.c @@ -7561,7 +7561,7 @@ fold_unary_loc (location_t loc, enum tree_code code, tree type, tree op0) if (arg0) { if (CONVERT_EXPR_CODE_P (code) - || code == FLOAT_EXPR || code == ABS_EXPR) + || code == FLOAT_EXPR || code == ABS_EXPR || code == NEGATE_EXPR) { /* Don't use STRIP_NOPS, because signedness of argument type matters. */ diff --git a/gcc/testsuite/ChangeLog b/gcc/testsuite/ChangeLog index 910a333..1800d48 100644 --- a/gcc/testsuite/ChangeLog +++ b/gcc/testsuite/ChangeLog @@ -1,5 +1,9 @@ 2011-07-07 Richard Guenther <rguenther@suse.de> + * gcc.dg/ftrapv-3.c: New testcase. + +2011-07-07 Richard Guenther <rguenther@suse.de> + * gcc.dg/tree-ssa/vrp58.c: New testcase. * gcc.dg/tree-ssa/scev-cast.c: Adjust. diff --git a/gcc/testsuite/gcc.dg/ftrapv-3.c b/gcc/testsuite/gcc.dg/ftrapv-3.c new file mode 100644 index 0000000..e23059a --- /dev/null +++ b/gcc/testsuite/gcc.dg/ftrapv-3.c @@ -0,0 +1,16 @@ +/* { dg-do run } */ +/* { dg-options "-ftrapv" } */ + +extern void abort (void); +unsigned long +foo (long i, long j) +{ + /* We may not fold this to (unsigned long)(i * j). */ + return -(unsigned long)(i * -j); +} +int main() +{ + if (foo (-__LONG_MAX__ - 1, -1) != -(unsigned long)(-__LONG_MAX__ - 1)) + abort (); + return 0; +} |