diff options
| -rw-r--r-- | llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp | 2 | ||||
| -rw-r--r-- | llvm/test/CodeGen/PowerPC/merge-st-chain-op.ll | 41 |
2 files changed, 43 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp index f94f506156c..ec64210667e 100644 --- a/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp +++ b/llvm/lib/CodeGen/SelectionDAG/DAGCombiner.cpp @@ -10986,6 +10986,8 @@ void DAGCombiner::getStoreMergeAndAliasCandidates( SDValue Chain = St->getChain(); for (auto I = Chain->use_begin(), E = Chain->use_end(); I != E; ++I) { if (StoreSDNode *OtherST = dyn_cast<StoreSDNode>(*I)) { + if (I.getOperandNo() != 0) + continue; if (OtherST->isVolatile() || OtherST->isIndexed()) continue; diff --git a/llvm/test/CodeGen/PowerPC/merge-st-chain-op.ll b/llvm/test/CodeGen/PowerPC/merge-st-chain-op.ll new file mode 100644 index 00000000000..bfb911c0115 --- /dev/null +++ b/llvm/test/CodeGen/PowerPC/merge-st-chain-op.ll @@ -0,0 +1,41 @@ +; RUN: llc < %s | FileCheck %s +target datalayout = "E-m:e-i64:64-n32:64" +target triple = "powerpc64-unknown-linux-gnu" + +@_ZNSs4_Rep20_S_empty_rep_storageE = external global [0 x i64], align 8 + +; Function Attrs: nounwind +define void @_ZN5clang7tooling15RefactoringTool10runAndSaveEPNS0_21FrontendActionFactoryE() #0 align 2 { +entry: + br i1 undef, label %_ZN4llvm18IntrusiveRefCntPtrIN5clang13DiagnosticIDsEEC2EPS2_.exit, label %return + +; CHECK: @_ZN5clang7tooling15RefactoringTool10runAndSaveEPNS0_21FrontendActionFactoryE + +_ZN4llvm18IntrusiveRefCntPtrIN5clang13DiagnosticIDsEEC2EPS2_.exit: ; preds = %entry + %call2 = call noalias i8* @_Znwm() #3 + %ref_cnt.i.i = bitcast i8* %call2 to i32* + store <2 x i8*> <i8* bitcast (i64* getelementptr inbounds ([0 x i64], [0 x i64]* @_ZNSs4_Rep20_S_empty_rep_storageE, i64 0, i64 3) to i8*), i8* bitcast (i64* getelementptr inbounds ([0 x i64], [0 x i64]* @_ZNSs4_Rep20_S_empty_rep_storageE, i64 0, i64 3) to i8*)>, <2 x i8*>* undef, align 8 + %IgnoreWarnings.i = getelementptr inbounds i8, i8* %call2, i64 4 + %0 = bitcast i8* %IgnoreWarnings.i to i32* + call void @llvm.memset.p0i8.i64(i8* null, i8 0, i64 48, i32 8, i1 false) #4 + store i32 251658240, i32* %0, align 4 + store i256 37662610426935100959726589394453639584271499769928088551424, i256* null, align 8 + store i32 1, i32* %ref_cnt.i.i, align 4 + unreachable + +return: ; preds = %entry + ret void +} + +; Function Attrs: nobuiltin +declare noalias i8* @_Znwm() #1 + +; Function Attrs: nounwind argmemonly +declare void @llvm.memset.p0i8.i64(i8* nocapture, i8, i64, i32, i1) #2 + +attributes #0 = { nounwind "target-cpu"="pwr7" } +attributes #1 = { nobuiltin "target-cpu"="pwr7" } +attributes #2 = { nounwind argmemonly } +attributes #3 = { builtin nounwind } +attributes #4 = { nounwind } + |
