diff options
| author | uweigand <uweigand@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-07-07 12:19:50 +0000 |
|---|---|---|
| committer | uweigand <uweigand@138bc75d-0d04-0410-961f-82ee72b054a4> | 2012-07-07 12:19:50 +0000 |
| commit | 7c4d4cbb54a12d1c3b733c3d0f32adbf4be092fc (patch) | |
| tree | a76cf9cd464e775a8a81e55e7aefb1eb28db63a7 | |
| parent | e8adf5570d287b9e07608f93d085dc720b32c737 (diff) | |
| download | gcc-7c4d4cbb54a12d1c3b733c3d0f32adbf4be092fc.tar.gz | |
* combine.c (force_to_mode) [LSHIFTRT]: Avoid undefined behaviour
due to negative shift amount.
git-svn-id: svn+ssh://gcc.gnu.org/svn/gcc/trunk@189347 138bc75d-0d04-0410-961f-82ee72b054a4
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/combine.c | 1 |
2 files changed, 6 insertions, 0 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 70d0eb620f1..1e1f7dca83b 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,8 @@ +2012-07-07 Ulrich Weigand <ulrich.weigand@linaro.org> + + * combine.c (force_to_mode) [LSHIFTRT]: Avoid undefined behaviour + due to negative shift amount. + 2012-07-07 Hans-Peter Nilsson <hp@axis.com> Fix configure test for "stack protector support in target C library". diff --git a/gcc/combine.c b/gcc/combine.c index 70b80bca738..ed87f1caa56 100644 --- a/gcc/combine.c +++ b/gcc/combine.c @@ -8433,6 +8433,7 @@ force_to_mode (rtx x, enum machine_mode mode, unsigned HOST_WIDE_INT mask, in OP_MODE. */ if (CONST_INT_P (XEXP (x, 1)) + && INTVAL (XEXP (x, 1)) >= 0 && INTVAL (XEXP (x, 1)) < HOST_BITS_PER_WIDE_INT && HWI_COMPUTABLE_MODE_P (op_mode)) { |