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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 | 19378d622eebdf94a582555076eab7ba8d5c20ea (patch) | |
| tree | eac473b3357be97753f3d02e114d548da4d3e2f9 /lib/Analysis/ScalarEvolution.cpp | |
| parent | 996b9d6aa9864c24178891adf29eeafd3f34d90c (diff) | |
| download | llvm-19378d622eebdf94a582555076eab7ba8d5c20ea.tar.gz llvm-19378d622eebdf94a582555076eab7ba8d5c20ea.tar.bz2 llvm-19378d622eebdf94a582555076eab7ba8d5c20ea.tar.xz | |
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.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@77078 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis/ScalarEvolution.cpp')
| -rw-r--r-- | lib/Analysis/ScalarEvolution.cpp | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/lib/Analysis/ScalarEvolution.cpp b/lib/Analysis/ScalarEvolution.cpp index 49af579366..6592e0d077 100644 --- a/lib/Analysis/ScalarEvolution.cpp +++ b/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), |