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| author | Nadav Rotem <nrotem@apple.com> | 2013-02-01 07:59:33 +0000 |
|---|---|---|
| committer | Nadav Rotem <nrotem@apple.com> | 2013-02-01 07:59:33 +0000 |
| commit | 4349f6963eead14e67ebb0cbe0042778be683484 (patch) | |
| tree | 6d8e9af71269c186d2fa556ab12358a473dbc104 /llvm/lib/Transforms | |
| parent | b5d6f5e988bc2aad10299b609fc3f060cdd2d7b3 (diff) | |
| download | bcm5719-llvm-4349f6963eead14e67ebb0cbe0042778be683484.tar.gz bcm5719-llvm-4349f6963eead14e67ebb0cbe0042778be683484.zip | |
Revert r174152. The shift amount may overflow and in that case this transformation is illegal.
llvm-svn: 174156
Diffstat (limited to 'llvm/lib/Transforms')
| -rw-r--r-- | llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp | 6 |
1 files changed, 0 insertions, 6 deletions
diff --git a/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp b/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp index f9e94f225f2..8cf76e5e8a9 100644 --- a/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp +++ b/llvm/lib/Transforms/InstCombine/InstCombineShifts.cpp @@ -709,12 +709,6 @@ Instruction *InstCombiner::visitShl(BinaryOperator &I) { match(I.getOperand(1), m_Constant(C2))) return BinaryOperator::CreateShl(ConstantExpr::getShl(C1, C2), A); - // shl (c1 , add(y , c2)) -> (shl (shl(c1, c2)), y) - if (match(I.getOperand(0), m_Constant(C1)) && - match(I.getOperand(1), m_Add(m_Value(A), m_Constant(C2)))) { - return BinaryOperator::CreateShl(ConstantExpr::getShl(C1, C2), A); - } - return 0; } |
