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| author | Dan Gohman <gohman@apple.com> | 2009-07-25 16:03:30 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2009-07-25 16:03:30 +0000 |
| commit | 534d66a426c9c97802a18815c01433d8695c2b2b (patch) | |
| tree | 8e6e2d3ac36fa922f6c0dca81f6f37c3106b0744 /llvm/lib/Analysis/ScalarEvolution.cpp | |
| parent | b7e6a3f527aff5871b2ee0803ea71d3f58a05f84 (diff) | |
| download | bcm5719-llvm-534d66a426c9c97802a18815c01433d8695c2b2b.tar.gz bcm5719-llvm-534d66a426c9c97802a18815c01433d8695c2b2b.zip | |
When attempting to sign-extend an addrec by interpreting
the step value as unsigned, the start value and the addrec
itself still need to be treated as signed.
llvm-svn: 77078
Diffstat (limited to 'llvm/lib/Analysis/ScalarEvolution.cpp')
| -rw-r--r-- | llvm/lib/Analysis/ScalarEvolution.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/llvm/lib/Analysis/ScalarEvolution.cpp b/llvm/lib/Analysis/ScalarEvolution.cpp index 49af5793662..6592e0d0778 100644 --- a/llvm/lib/Analysis/ScalarEvolution.cpp +++ b/llvm/lib/Analysis/ScalarEvolution.cpp @@ -923,10 +923,10 @@ const SCEV *ScalarEvolution::getSignExtendExpr(const SCEV *Op, getTruncateOrZeroExtend(Step, Start->getType())); Add = getAddExpr(Start, UMul); OperandExtendedAdd = - getAddExpr(getZeroExtendExpr(Start, WideTy), + getAddExpr(getSignExtendExpr(Start, WideTy), getMulExpr(getZeroExtendExpr(CastedMaxBECount, WideTy), getZeroExtendExpr(Step, WideTy))); - if (getZeroExtendExpr(Add, WideTy) == OperandExtendedAdd) + if (getSignExtendExpr(Add, WideTy) == OperandExtendedAdd) // Return the expression with the addrec on the outside. return getAddRecExpr(getSignExtendExpr(Start, Ty), getZeroExtendExpr(Step, Ty), |
