From 001a93bbcb12823df7e85957819f1f73f762244b Mon Sep 17 00:00:00 2001 From: Daniel Sanders Date: Thu, 21 Nov 2013 11:40:14 +0000 Subject: [PATCH] [mips][msa/dsp] Only do DSP combines if DSP is enabled. Fixes a crash (null pointer dereferenced) when MSA is enabled. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@195343 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/Mips/MipsSEISelLowering.cpp | 3 + .../Mips/msa/llvm-stress-s2704903805.ll | 141 ++++++++++++++++++ 2 files changed, 144 insertions(+) create mode 100644 test/CodeGen/Mips/msa/llvm-stress-s2704903805.ll diff --git a/lib/Target/Mips/MipsSEISelLowering.cpp b/lib/Target/Mips/MipsSEISelLowering.cpp index eb9656acaef..274cdc1f89a 100644 --- a/lib/Target/Mips/MipsSEISelLowering.cpp +++ b/lib/Target/Mips/MipsSEISelLowering.cpp @@ -751,6 +751,9 @@ static SDValue performDSPShiftCombine(unsigned Opc, SDNode *N, EVT Ty, unsigned EltSize = Ty.getVectorElementType().getSizeInBits(); BuildVectorSDNode *BV = dyn_cast(N->getOperand(1)); + if (!Subtarget->hasDSP()) + return SDValue(); + if (!BV || !BV->isConstantSplat(SplatValue, SplatUndef, SplatBitSize, HasAnyUndefs, EltSize, !Subtarget->isLittle()) || diff --git a/test/CodeGen/Mips/msa/llvm-stress-s2704903805.ll b/test/CodeGen/Mips/msa/llvm-stress-s2704903805.ll new file mode 100644 index 00000000000..e14f405320c --- /dev/null +++ b/test/CodeGen/Mips/msa/llvm-stress-s2704903805.ll @@ -0,0 +1,141 @@ +; RUN: llc -march=mips < %s +; RUN: llc -march=mips -mattr=+msa,+fp64 < %s +; RUN: llc -march=mipsel < %s +; RUN: llc -march=mipsel -mattr=+msa,+fp64 < %s + +; This test originally failed for MSA after dereferencing a null this pointer. +; It should at least successfully build. + +define void @autogen_SD2704903805(i8*, i32*, i64*, i32, i64, i8) { +BB: + %A4 = alloca i32 + %A3 = alloca i32 + %A2 = alloca i8 + %A1 = alloca i32 + %A = alloca i8 + %L = load i8* %0 + store i8 %5, i8* %0 + %E = extractelement <2 x i16> zeroinitializer, i32 0 + %Shuff = shufflevector <1 x i8> , <1 x i8> , <1 x i32> undef + %I = insertelement <1 x i8> , i8 85, i32 0 + %B = lshr <2 x i16> zeroinitializer, zeroinitializer + %FC = sitofp <4 x i16> zeroinitializer to <4 x float> + %Sl = select i1 true, float 0.000000e+00, float 0x401E76A240000000 + %Cmp = icmp ule i16 -25210, %E + br label %CF83 + +CF83: ; preds = %BB + %L5 = load i8* %0 + store i8 85, i8* %0 + %E6 = extractelement <1 x i8> , i32 0 + %Shuff7 = shufflevector <2 x i16> zeroinitializer, <2 x i16> zeroinitializer, <2 x i32> + %I8 = insertelement <4 x i16> zeroinitializer, i16 %E, i32 3 + %B9 = ashr <2 x i16> %Shuff7, zeroinitializer + %FC10 = sitofp i32 -1 to float + %Sl11 = select i1 %Cmp, i32 -1, i32 -1 + %Cmp12 = icmp sgt i32 -1, -1 + br label %CF + +CF: ; preds = %CF, %CF81, %CF83 + %L13 = load i8* %0 + store i8 0, i8* %0 + %E14 = extractelement <2 x i64> zeroinitializer, i32 0 + %Shuff15 = shufflevector <4 x i64> , <4 x i64> , <4 x i32> + %I16 = insertelement <4 x i64> , i64 81222, i32 1 + %B17 = lshr <2 x i16> zeroinitializer, %B + %Tr = trunc i32 272597 to i1 + br i1 %Tr, label %CF, label %CF80 + +CF80: ; preds = %CF80, %CF + %Sl18 = select i1 %Cmp, <2 x i64> zeroinitializer, <2 x i64> zeroinitializer + %Cmp19 = icmp ne i1 %Cmp12, %Cmp + br i1 %Cmp19, label %CF80, label %CF81 + +CF81: ; preds = %CF80 + %L20 = load i8* %0 + store i8 85, i8* %0 + %E21 = extractelement <1 x i8> , i32 0 + %Shuff22 = shufflevector <1 x i8> , <1 x i8> %Shuff, <1 x i32> zeroinitializer + %I23 = insertelement <1 x i8> , i8 %L5, i32 0 + %FC24 = fptoui <4 x float> %FC to <4 x i16> + %Sl25 = select i1 %Cmp, <2 x i32> zeroinitializer, <2 x i32> + %Cmp26 = icmp ult <4 x i64> %I16, %Shuff15 + %L27 = load i8* %0 + store i8 %L, i8* %0 + %E28 = extractelement <1 x i8> , i32 0 + %Shuff29 = shufflevector <8 x i16> zeroinitializer, <8 x i16> zeroinitializer, <8 x i32> + %I30 = insertelement <4 x i64> , i64 %E14, i32 1 + %B31 = mul i8 %E28, 85 + %PC = bitcast i32* %A3 to i32* + %Sl32 = select i1 %Cmp12, float %FC10, float 0x4712BFE680000000 + %L33 = load i32* %PC + store i32 %L33, i32* %PC + %E34 = extractelement <2 x i16> zeroinitializer, i32 1 + %Shuff35 = shufflevector <1 x i8> %Shuff, <1 x i8> , <1 x i32> zeroinitializer + %I36 = insertelement <1 x i8> , i8 %L13, i32 0 + %B37 = xor i8 %L27, %L + %Sl38 = select i1 %Cmp, i16 %E34, i16 %E + %Cmp39 = icmp eq i1 %Cmp19, %Cmp + br i1 %Cmp39, label %CF, label %CF77 + +CF77: ; preds = %CF77, %CF81 + %L40 = load i32* %PC + store i32 %3, i32* %PC + %E41 = extractelement <2 x i32> zeroinitializer, i32 0 + %Shuff42 = shufflevector <2 x i32> , <2 x i32> zeroinitializer, <2 x i32> + %I43 = insertelement <1 x i8> , i8 0, i32 0 + %B44 = or i16 %E, -25210 + %Se = sext i32 %3 to i64 + %Sl45 = select i1 true, <1 x i8> %Shuff, <1 x i8> %I43 + %Cmp46 = icmp sge <1 x i8> %I36, %Shuff + %L47 = load i32* %PC + store i32 %L33, i32* %PC + %E48 = extractelement <2 x i16> zeroinitializer, i32 0 + %Shuff49 = shufflevector <1 x i8> , <1 x i8> , <1 x i32> + %I50 = insertelement <2 x i32> %Sl25, i32 47963, i32 1 + %B51 = srem <1 x i8> %I, %Shuff22 + %FC52 = sitofp i8 %5 to double + %Sl53 = select i1 %Cmp39, i8 %L27, i8 85 + %Cmp54 = icmp slt i16 %E34, %E34 + br i1 %Cmp54, label %CF77, label %CF78 + +CF78: ; preds = %CF78, %CF77 + %L55 = load i32* %PC + store i32 %L33, i32* %PC + %E56 = extractelement <8 x i16> %Shuff29, i32 4 + %Shuff57 = shufflevector <1 x i8> , <1 x i8> , <1 x i32> + %I58 = insertelement <1 x i8> %B51, i8 %Sl53, i32 0 + %ZE = fpext float %FC10 to double + %Sl59 = select i1 %Cmp12, <2 x i16> %B9, <2 x i16> zeroinitializer + %Cmp60 = fcmp ult double 0.000000e+00, 0.000000e+00 + br i1 %Cmp60, label %CF78, label %CF79 + +CF79: ; preds = %CF79, %CF78 + %L61 = load i32* %PC + store i32 %L33, i32* %A3 + %E62 = extractelement <4 x i64> %Shuff15, i32 1 + %Shuff63 = shufflevector <8 x i16> %Shuff29, <8 x i16> %Shuff29, <8 x i32> + %I64 = insertelement <2 x i64> zeroinitializer, i64 %Se, i32 0 + %B65 = shl i8 %5, 85 + %ZE66 = zext <4 x i1> %Cmp26 to <4 x i32> + %Sl67 = select i1 %Tr, <1 x i8> %Shuff, <1 x i8> %I23 + %Cmp68 = fcmp olt float 0x4712BFE680000000, 0x4712BFE680000000 + br i1 %Cmp68, label %CF79, label %CF82 + +CF82: ; preds = %CF79 + %L69 = load i32* %PC + store i32 %L33, i32* %PC + %E70 = extractelement <8 x i16> zeroinitializer, i32 3 + %Shuff71 = shufflevector <4 x i64> %Shuff15, <4 x i64> , <4 x i32> + %I72 = insertelement <1 x i8> , i8 %L, i32 0 + %B73 = srem i64 %E62, %Se + %ZE74 = zext <4 x i1> %Cmp26 to <4 x i32> + %Sl75 = select i1 %Cmp, i32 463279, i32 %L61 + %Cmp76 = icmp sgt <1 x i8> %Shuff49, %Shuff22 + store i8 %B31, i8* %0 + store i8 85, i8* %0 + store i32 %L33, i32* %PC + store i8 %B65, i8* %0 + store i8 %L5, i8* %0 + ret void +} -- 2.34.1