diff options
| author | Edwin Török <edwintorok@gmail.com> | 2009-05-23 17:29:48 +0000 |
|---|---|---|
| committer | Edwin Török <edwintorok@gmail.com> | 2009-05-23 17:29:48 +0000 |
| commit | a9bb5d91c0090d8492df3314237c97cbbccfc02e (patch) | |
| tree | 8bffda5d5211572322ad8c2a363f01f52bac765b /lib/Target/SubtargetFeature.cpp | |
| parent | 98178f48c7142f7ec79260ead343f0afb98cf686 (diff) | |
| download | external_llvm-a9bb5d91c0090d8492df3314237c97cbbccfc02e.zip external_llvm-a9bb5d91c0090d8492df3314237c97cbbccfc02e.tar.gz external_llvm-a9bb5d91c0090d8492df3314237c97cbbccfc02e.tar.bz2 | |
Fix PR4254.
The DAGCombiner created a negative shiftamount, stored in an
unsigned variable. Later the optimizer eliminated the shift entirely as being
undefined.
Example: (srl (shl X, 56) 48). ShiftAmt is 4294967288.
Fix it by checking that the shiftamount is positive, and storing in a signed
variable.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72331 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/SubtargetFeature.cpp')
0 files changed, 0 insertions, 0 deletions