Misc mid-level changes for new 'fence' instruction.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@136205 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Transforms/Scalar/LowerAtomic.cpp b/lib/Transforms/Scalar/LowerAtomic.cpp
index 9087b46..7f4d9e9 100644
--- a/lib/Transforms/Scalar/LowerAtomic.cpp
+++ b/lib/Transforms/Scalar/LowerAtomic.cpp
@@ -115,6 +115,11 @@
return true;
}
+static bool LowerFenceInst(FenceInst *FI) {
+ FI->eraseFromParent();
+ return true;
+}
+
namespace {
struct LowerAtomic : public BasicBlockPass {
static char ID;
@@ -123,9 +128,13 @@
}
bool runOnBasicBlock(BasicBlock &BB) {
bool Changed = false;
- for (BasicBlock::iterator DI = BB.begin(), DE = BB.end(); DI != DE; )
- if (IntrinsicInst *II = dyn_cast<IntrinsicInst>(DI++))
+ for (BasicBlock::iterator DI = BB.begin(), DE = BB.end(); DI != DE; ) {
+ Instruction *Inst = DI++;
+ if (IntrinsicInst *II = dyn_cast<IntrinsicInst>(Inst))
Changed |= LowerAtomicIntrinsic(II);
+ if (FenceInst *FI = dyn_cast<FenceInst>(Inst))
+ Changed |= LowerFenceInst(FI);
+ }
return Changed;
}
};