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| author | Torok Edwin <edwintorok@gmail.com> | 2009-05-23 17:29:48 +0000 |
|---|---|---|
| committer | Torok Edwin <edwintorok@gmail.com> | 2009-05-23 17:29:48 +0000 |
| commit | 6bb4958543e2b7ff412b3dac3ebf01a184193ad7 (patch) | |
| tree | 8bffda5d5211572322ad8c2a363f01f52bac765b /lib/System/Unix/Process.inc | |
| parent | 1f04462c22a2b0fc0bb1fc7d33b39418308fb868 (diff) | |
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/System/Unix/Process.inc')
0 files changed, 0 insertions, 0 deletions