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Do not try to create a MVT type of width 0.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@72557 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -4937,6 +4937,8 @@ SDValue DAGCombiner::ReduceLoadOpStoreWidth(SDNode *N) {
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APInt Imm = cast<ConstantSDNode>(N1)->getAPIntValue();
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if (Opc == ISD::AND)
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Imm ^= APInt::getAllOnesValue(BitWidth);
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if (Imm == 0 || Imm.isAllOnesValue())
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return SDValue();
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unsigned ShAmt = Imm.countTrailingZeros();
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unsigned MSB = BitWidth - Imm.countLeadingZeros() - 1;
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unsigned NewBW = NextPowerOf2(MSB - ShAmt);
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38
test/CodeGen/X86/2009-05-28-DAGCombineCrash.ll
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38
test/CodeGen/X86/2009-05-28-DAGCombineCrash.ll
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@ -0,0 +1,38 @@
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; RUN: llvm-as < %s | llc -march=x86-64
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%struct.tempsym_t = type { i8*, i8*, i8*, i8*, i32, i32, i32, i32, i32 }
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define fastcc signext i8 @S_next_symbol(%struct.tempsym_t* %symptr) nounwind ssp {
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entry:
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br label %bb116
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bb: ; preds = %bb116
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switch i8 undef, label %bb14 [
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i8 9, label %bb116
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i8 32, label %bb116
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i8 10, label %bb116
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i8 13, label %bb116
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i8 12, label %bb116
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]
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bb14: ; preds = %bb
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br i1 undef, label %bb75, label %bb115
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bb75: ; preds = %bb14
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%srcval16 = load i448* null, align 8 ; <i448> [#uses=1]
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%tmp = zext i32 undef to i448 ; <i448> [#uses=1]
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%tmp15 = shl i448 %tmp, 288 ; <i448> [#uses=1]
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%mask = and i448 %srcval16, -2135987035423586845985235064014169866455883682256196619149693890381755748887481053010428711403521 ; <i448> [#uses=1]
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%ins = or i448 %tmp15, %mask ; <i448> [#uses=1]
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store i448 %ins, i448* null, align 8
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ret i8 1
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bb115: ; preds = %bb14
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ret i8 1
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bb116: ; preds = %bb, %bb, %bb, %bb, %bb, %entry
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br i1 undef, label %bb, label %bb117
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bb117: ; preds = %bb116
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ret i8 0
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}
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