Fix ubsan failures in lane mask shifts

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@289826 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Krzysztof Parzyszek 2016-12-15 16:08:49 +00:00
parent a533d6cc52
commit 65440dd40b

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@ -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";