diff options
| -rw-r--r-- | llvm/lib/Target/SystemZ/SystemZISelLowering.cpp | 2 | ||||
| -rw-r--r-- | llvm/test/CodeGen/SystemZ/dag-combine-04.ll | 19 |
2 files changed, 20 insertions, 1 deletions
diff --git a/llvm/lib/Target/SystemZ/SystemZISelLowering.cpp b/llvm/lib/Target/SystemZ/SystemZISelLowering.cpp index 14a96389698..e69afd8a36a 100644 --- a/llvm/lib/Target/SystemZ/SystemZISelLowering.cpp +++ b/llvm/lib/Target/SystemZ/SystemZISelLowering.cpp @@ -5357,7 +5357,7 @@ SDValue SystemZTargetLowering::combineSTORE( // for the extraction to be done on a vMiN value, so that we can use VSTE. // If X has wider elements then convert it to: // (truncstoreiN (extract_vector_elt (bitcast X), Y2), Z). - if (MemVT.isInteger()) { + if (MemVT.isInteger() && SN->isTruncatingStore()) { if (SDValue Value = combineTruncateExtract(SDLoc(N), MemVT, SN->getValue(), DCI)) { DCI.AddToWorklist(Value.getNode()); diff --git a/llvm/test/CodeGen/SystemZ/dag-combine-04.ll b/llvm/test/CodeGen/SystemZ/dag-combine-04.ll new file mode 100644 index 00000000000..4837c462d5e --- /dev/null +++ b/llvm/test/CodeGen/SystemZ/dag-combine-04.ll @@ -0,0 +1,19 @@ +; Test that SystemZTargetLowering::combineSTORE() does not crash due to not +; checking if store is actually a truncating store before calling +; combineTruncateExtract(). +; +; RUN: llc -mtriple=s390x-linux-gnu -mcpu=z13 < %s + +@g_348 = external dso_local unnamed_addr global [6 x [10 x i16]], align 2 + +define void @main() local_unnamed_addr { +bb: + %tmp = load i16, i16* getelementptr inbounds ([6 x [10 x i16]], [6 x [10 x i16]]* @g_348, i64 0, i64 1, i64 6), align 2 + %tmp1 = xor i16 %tmp, 0 + %tmp2 = insertelement <2 x i16> <i16 undef, i16 0>, i16 %tmp1, i32 0 + %tmp3 = shufflevector <2 x i16> %tmp2, <2 x i16> undef, <2 x i32> <i32 1, i32 undef> + %tmp4 = xor <2 x i16> %tmp2, %tmp3 + %tmp5 = extractelement <2 x i16> %tmp4, i32 0 + store i16 %tmp5, i16* getelementptr inbounds ([6 x [10 x i16]], [6 x [10 x i16]]* @g_348, i64 0, i64 1, i64 6), align 2 + unreachable +} |
