diff options
| -rw-r--r-- | lib/Transforms/Scalar/InstructionCombining.cpp | 6 | ||||
| -rw-r--r-- | test/Transforms/InstCombine/vec_demanded_elts-3.ll | 14 |
2 files changed, 20 insertions, 0 deletions
diff --git a/lib/Transforms/Scalar/InstructionCombining.cpp b/lib/Transforms/Scalar/InstructionCombining.cpp index 97bd34c771..6d2ff0e3e5 100644 --- a/lib/Transforms/Scalar/InstructionCombining.cpp +++ b/lib/Transforms/Scalar/InstructionCombining.cpp @@ -12579,6 +12579,12 @@ Instruction *InstCombiner::visitInsertElementInst(InsertElementInst &IE) { } } + unsigned VWidth = cast<VectorType>(VecOp->getType())->getNumElements(); + APInt UndefElts(VWidth, 0); + APInt AllOnesEltMask(APInt::getAllOnesValue(VWidth)); + if (SimplifyDemandedVectorElts(&IE, AllOnesEltMask, UndefElts)) + return &IE; + return 0; } diff --git a/test/Transforms/InstCombine/vec_demanded_elts-3.ll b/test/Transforms/InstCombine/vec_demanded_elts-3.ll new file mode 100644 index 0000000000..eba3629eb9 --- /dev/null +++ b/test/Transforms/InstCombine/vec_demanded_elts-3.ll @@ -0,0 +1,14 @@ +; RUN: llvm-as < %s | opt -instcombine | llvm-dis | not grep load +; PR4340 + +define void @vac(<4 x float>* nocapture %a) nounwind { +entry: + %tmp1 = load <4 x float>* %a ; <<4 x float>> [#uses=1] + %vecins = insertelement <4 x float> %tmp1, float 0.000000e+00, i32 0 ; <<4 x float>> [#uses=1] + %vecins4 = insertelement <4 x float> %vecins, float 0.000000e+00, i32 1; <<4 x float>> [#uses=1] + %vecins6 = insertelement <4 x float> %vecins4, float 0.000000e+00, i32 2; <<4 x float>> [#uses=1] + %vecins8 = insertelement <4 x float> %vecins6, float 0.000000e+00, i32 3; <<4 x float>> [#uses=1] + store <4 x float> %vecins8, <4 x float>* %a + ret void +} + |