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| author | Manman Ren <mren@apple.com> | 2013-03-18 21:23:25 +0000 |
|---|---|---|
| committer | Manman Ren <mren@apple.com> | 2013-03-18 21:23:25 +0000 |
| commit | 1217112d1167a4c11bcb2ef4471fc66fc4e43cc4 (patch) | |
| tree | 35a5a3585461191d77e019cca8f2b789a5f4c2ac /llvm/lib/Analysis | |
| parent | c2bc61b00656b573e146ceaff46853819ab2c4f9 (diff) | |
| download | bcm5719-llvm-1217112d1167a4c11bcb2ef4471fc66fc4e43cc4.tar.gz bcm5719-llvm-1217112d1167a4c11bcb2ef4471fc66fc4e43cc4.zip | |
Check whether a pointer is non-null (isKnownNonNull) in isKnownNonZero.
This handles the case where we have an inbounds GEP with alloca as the pointer.
This fixes the regression in PR12750 and rdar://13286434.
Note that we can also fix this by handling some GEP cases in isKnownNonNull.
llvm-svn: 177321
Diffstat (limited to 'llvm/lib/Analysis')
| -rw-r--r-- | llvm/lib/Analysis/ValueTracking.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/Analysis/ValueTracking.cpp b/llvm/lib/Analysis/ValueTracking.cpp index 45b75df5087..45dcc5e37ec 100644 --- a/llvm/lib/Analysis/ValueTracking.cpp +++ b/llvm/lib/Analysis/ValueTracking.cpp @@ -953,6 +953,8 @@ bool llvm::isKnownNonZero(Value *V, const DataLayout *TD, unsigned Depth) { // Check for pointer simplifications. if (V->getType()->isPointerTy()) { + if (isKnownNonNull(V)) + return true; if (GEPOperator *GEP = dyn_cast<GEPOperator>(V)) if (isGEPKnownNonNull(GEP, TD, Depth)) return true; |
