diff options
| author | Krzysztof Parzyszek <kparzysz@codeaurora.org> | 2016-12-15 16:08:49 +0000 |
|---|---|---|
| committer | Krzysztof Parzyszek <kparzysz@codeaurora.org> | 2016-12-15 16:08:49 +0000 |
| commit | 65440dd40b449db1ee2068826a3e151b9d80b605 (patch) | |
| tree | 8674aac8c4f05fa62b1807b572a9b047de9c65fe /utils/TableGen/RegisterInfoEmitter.cpp | |
| parent | a533d6cc52abde01375d61e8a65e1f738a821665 (diff) | |
Fix ubsan failures in lane mask shifts
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@289826 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'utils/TableGen/RegisterInfoEmitter.cpp')
| -rw-r--r-- | utils/TableGen/RegisterInfoEmitter.cpp | 12 |
1 files changed, 8 insertions, 4 deletions
diff --git a/utils/TableGen/RegisterInfoEmitter.cpp b/utils/TableGen/RegisterInfoEmitter.cpp index 73ac332261d..c82eddc6537 100644 --- a/utils/TableGen/RegisterInfoEmitter.cpp +++ b/utils/TableGen/RegisterInfoEmitter.cpp @@ -778,8 +778,10 @@ RegisterInfoEmitter::emitComposeSubRegIndexLaneMask(raw_ostream &OS, " LaneBitmask Result;\n" " for (const MaskRolOp *Ops = CompositeSequences[IdxA]; !Ops->Mask.none(); ++Ops) {\n" " LaneBitmask::Type M = LaneMask.getAsInteger() & Ops->Mask.getAsInteger();\n" - " unsigned S = Ops->RotateLeft;\n" - " Result |= LaneBitmask((M << S) | (M >> (LaneBitmask::BitWidth - S)));\n" + " if (unsigned S = Ops->RotateLeft)\n" + " Result |= LaneBitmask((M << S) | (M >> (LaneBitmask::BitWidth - S)));\n" + " else\n" + " Result |= LaneBitmask(M);\n" " }\n" " return Result;\n" "}\n\n"; @@ -793,8 +795,10 @@ RegisterInfoEmitter::emitComposeSubRegIndexLaneMask(raw_ostream &OS, " LaneBitmask Result;\n" " for (const MaskRolOp *Ops = CompositeSequences[IdxA]; !Ops->Mask.none(); ++Ops) {\n" " LaneBitmask::Type M = LaneMask.getAsInteger();\n" - " unsigned S = Ops->RotateLeft;\n" - " Result |= LaneBitmask((M >> S) | (M << (LaneBitmask::BitWidth - S)));\n" + " if (unsigned S = Ops->RotateLeft)\n" + " Result |= LaneBitmask((M >> S) | (M << (LaneBitmask::BitWidth - S)));\n" + " else\n" + " Result |= LaneBitmask(M);\n" " }\n" " return Result;\n" "}\n\n"; |