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| author | Dimitry Andric <dim@FreeBSD.org> | 2014-11-22 16:30:31 +0000 |
|---|---|---|
| committer | Dimitry Andric <dim@FreeBSD.org> | 2014-11-22 16:30:31 +0000 |
| commit | 5008830b518e5629416dedb218cf34003eec3ce1 (patch) | |
| tree | 6be99c4d4ffb7f9d56c0a0a8b773228ac73431b6 /contrib | |
| parent | 08dc8cf90c71ffa0bf53ec2a326733f36e01b40e (diff) | |
| download | src-5008830b518e5629416dedb218cf34003eec3ce1.tar.gz src-5008830b518e5629416dedb218cf34003eec3ce1.zip | |
Avoid undefined behaviour in gas's rotate_left() macro for n == 0.
Otherwise, clang can effectively remove the first iteration of the for
loops where this macro is invoked, and as a result, "cmp r0, #99" fails
to assemble.
Obtained from: joerg at netbsd
MFC after: 3 days
Notes
Notes:
svn path=/head/; revision=274856
Diffstat (limited to 'contrib')
| -rw-r--r-- | contrib/binutils/gas/config/tc-arm.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/contrib/binutils/gas/config/tc-arm.c b/contrib/binutils/gas/config/tc-arm.c index 8b470c0335e0..37c2a9075013 100644 --- a/contrib/binutils/gas/config/tc-arm.c +++ b/contrib/binutils/gas/config/tc-arm.c @@ -6079,7 +6079,7 @@ parse_operands (char *str, const unsigned char *pattern) /* Functions for operand encoding. ARM, then Thumb. */ -#define rotate_left(v, n) (v << n | v >> (32 - n)) +#define rotate_left(v, n) (v << (n % 32) | v >> ((32 - n) % 32)) /* If VAL can be encoded in the immediate field of an ARM instruction, return the encoded form. Otherwise, return FAIL. */ |