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AMDGPU: Produce error on dynamic_stackalloc

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@246048 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matt Arsenault 2015-08-26 18:37:13 +00:00
parent d4213e9ee8
commit ca675427d2
4 changed files with 30 additions and 0 deletions
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13
lib/Target/AMDGPU/AMDGPUISelLowering.cpp
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@ -113,6 +113,9 @@ AMDGPUTargetLowering::AMDGPUTargetLowering(TargetMachine &TM,
setOperationAction(ISD::BR_JT, MVT::Other, Expand);
setOperationAction(ISD::BRIND, MVT::Other, Expand);
// This is totally unsupported, just custom lower to produce an error.
setOperationAction(ISD::DYNAMIC_STACKALLOC, MVT::i32, Custom);
// We need to custom lower some of the intrinsics
setOperationAction(ISD::INTRINSIC_WO_CHAIN, MVT::Other, Custom);
@ -613,6 +616,15 @@ SDValue AMDGPUTargetLowering::LowerCall(CallLoweringInfo &CLI,
return SDValue();
}
SDValue AMDGPUTargetLowering::LowerDYNAMIC_STACKALLOC(SDValue Op,
SelectionDAG &DAG) const {
const Function &Fn = *DAG.getMachineFunction().getFunction();
DiagnosticInfoUnsupported NoDynamicAlloca(Fn, "dynamic alloca");
DAG.getContext()->diagnose(NoDynamicAlloca);
return SDValue();
}
SDValue AMDGPUTargetLowering::LowerOperation(SDValue Op,
SelectionDAG &DAG) const {
switch (Op.getOpcode()) {
@ -639,6 +651,7 @@ SDValue AMDGPUTargetLowering::LowerOperation(SDValue Op,
case ISD::UINT_TO_FP: return LowerUINT_TO_FP(Op, DAG);
case ISD::FP_TO_SINT: return LowerFP_TO_SINT(Op, DAG);
case ISD::FP_TO_UINT: return LowerFP_TO_UINT(Op, DAG);
case ISD::DYNAMIC_STACKALLOC: return LowerDYNAMIC_STACKALLOC(Op, DAG);
}
return Op;
}

3
lib/Target/AMDGPU/AMDGPUISelLowering.h
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@ -149,6 +149,9 @@ public:
SDValue LowerCall(CallLoweringInfo &CLI,
SmallVectorImpl<SDValue> &InVals) const override;
SDValue LowerDYNAMIC_STACKALLOC(SDValue Op,
SelectionDAG &DAG) const;
SDValue LowerOperation(SDValue Op, SelectionDAG &DAG) const override;
SDValue PerformDAGCombine(SDNode *N, DAGCombinerInfo &DCI) const override;
void ReplaceNodeResults(SDNode * N,

3
lib/Target/AMDGPU/AMDGPUPromoteAlloca.cpp
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@ -276,6 +276,9 @@ static bool collectUsesWithPtrTypes(Value *Val, std::vector<Value*> &WorkList) {
}
void AMDGPUPromoteAlloca::visitAlloca(AllocaInst &I) {
if (!I.isStaticAlloca())
return;
IRBuilder<> Builder(&I);
// First try to replace the alloca with a vector

11
test/CodeGen/AMDGPU/dynamic_stackalloc.ll Normal file
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@ -0,0 +1,11 @@
; RUN: not llc -march=amdgcn -mcpu=tahiti -mattr=+promote-alloca -verify-machineinstrs < %s 2>&1 | FileCheck %s
; RUN: not llc -march=amdgcn -mcpu=tahiti -mattr=-promote-alloca -verify-machineinstrs < %s 2>&1 | FileCheck %s
; RUN: not llc -march=r600 -mcpu=cypress < %s 2>&1 | FileCheck %s
; CHECK: error: unsupported dynamic alloca in test_dynamic_stackalloc
define void @test_dynamic_stackalloc(i32 addrspace(1)* %out, i32 %n) {
%alloca = alloca i32, i32 %n
store volatile i32 0, i32* %alloca
ret void
}