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| author | Markus Trippelsdorf <markus@trippelsdorf.de> | 2016-12-01 14:04:13 +0000 |
|---|---|---|
| committer | Markus Trippelsdorf <trippels@gcc.gnu.org> | 2016-12-01 14:04:13 +0000 |
| commit | 67586d38f5b1858fba96973e9341f7d65f64ea9c (patch) | |
| tree | 6d5f389bb68e5a5a03cb2486febc70f0b90005ee /gcc | |
| parent | 8e9c33cd3bd55c2364a2efc7fc2de0957d7b991d (diff) | |
| download | gcc-67586d38f5b1858fba96973e9341f7d65f64ea9c.zip gcc-67586d38f5b1858fba96973e9341f7d65f64ea9c.tar.gz gcc-67586d38f5b1858fba96973e9341f7d65f64ea9c.tar.bz2 | |
Fix rtl-optimization/78596 - combine.c:12561:14: runtime error: left shift of negative value
PR rtl-optimization/78596
* combine.c (simplify_comparison): Cast to unsigned to avoid
left shifting of negative value.
From-SVN: r243111
Diffstat (limited to 'gcc')
| -rw-r--r-- | gcc/ChangeLog | 6 | ||||
| -rw-r--r-- | gcc/combine.c | 3 |
2 files changed, 8 insertions, 1 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 4d15a73..b90cbc6 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,9 @@ +2016-12-01 Markus Trippelsdorf <markus@trippelsdorf.de> + + PR rtl-optimization/78596 + * combine.c (simplify_comparison): Cast to unsigned to avoid + left shifting of negative value. + 2016-12-01 Matthias Klose <doko@ubuntu.com> * doc/install.texi: Don't use pkg-config to check for bdw-gc. diff --git a/gcc/combine.c b/gcc/combine.c index faafcb7..b429453 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -12561,7 +12561,8 @@ simplify_comparison (enum rtx_code code, rtx *pop0, rtx *pop1) if (GET_CODE (op0) == LSHIFTRT) code = unsigned_condition (code); - const_op <<= INTVAL (XEXP (op0, 1)); + const_op = (unsigned HOST_WIDE_INT) const_op + << INTVAL (XEXP (op0, 1)); if (low_bits != 0 && (code == GT || code == GTU || code == LE || code == LEU)) |