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| author | Dan Gohman <gohman@apple.com> | 2010-05-13 19:19:32 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2010-05-13 19:19:32 +0000 |
| commit | e1308d86ed2402483aa9d056af531fd773e1121f (patch) | |
| tree | e733006eaa5fbc10eeb8d5224d6ae33fdbe042c0 /lib/CodeGen/SelectionDAG/FastISel.cpp | |
| parent | 2c18d3b0fec25b2b7befc7ac5751e84005f4a869 (diff) | |
An Instruction has a trivial kill only if its use is in the same
basic block.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@103725 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/SelectionDAG/FastISel.cpp')
| -rw-r--r-- | lib/CodeGen/SelectionDAG/FastISel.cpp | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/lib/CodeGen/SelectionDAG/FastISel.cpp b/lib/CodeGen/SelectionDAG/FastISel.cpp index 24456504cc..253ceca15e 100644 --- a/lib/CodeGen/SelectionDAG/FastISel.cpp +++ b/lib/CodeGen/SelectionDAG/FastISel.cpp @@ -57,9 +57,12 @@ using namespace llvm; bool FastISel::hasTrivialKill(const Value *V) const { - // Don't consider constants or arguments to have trivial kills. + // Don't consider constants or arguments to have trivial kills. Only + // instructions with a single use in the same basic block. const Instruction *I = dyn_cast<Instruction>(V); - return I && I->hasOneUse(); + return I && + I->hasOneUse() && + cast<Instruction>(I->use_begin())->getParent() == I->getParent(); } unsigned FastISel::getRegForValue(const Value *V) { |