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R600: Don't crash on unhandled instruction in promote alloca

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@211906 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Matt Arsenault 2014-06-27 16:52:49 +00:00
parent b880c129ec
commit ee5d4a7b73
4 changed files with 90 additions and 3 deletions
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26
lib/Target/R600/AMDGPUPromoteAlloca.cpp
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@ -129,6 +129,22 @@ static Value* GEPToVectorIndex(GetElementPtrInst *GEP) {
return GEP->getOperand(2);
}
// Not an instruction handled below to turn into a vector.
//
// TODO: Check isTriviallyVectorizable for calls and handle other
// instructions.
static bool canVectorizeInst(Instruction *Inst) {
switch (Inst->getOpcode()) {
case Instruction::Load:
case Instruction::Store:
case Instruction::BitCast:
case Instruction::AddrSpaceCast:
return true;
default:
return false;
}
}
static bool tryPromoteAllocaToVector(AllocaInst *Alloca) {
Type *AllocaTy = Alloca->getAllocatedType();
@ -149,6 +165,9 @@ static bool tryPromoteAllocaToVector(AllocaInst *Alloca) {
for (User *AllocaUser : Alloca->users()) {
GetElementPtrInst *GEP = dyn_cast<GetElementPtrInst>(AllocaUser);
if (!GEP) {
if (!canVectorizeInst(cast<Instruction>(AllocaUser)))
return false;
WorkList.push_back(AllocaUser);
continue;
}
@ -164,6 +183,9 @@ static bool tryPromoteAllocaToVector(AllocaInst *Alloca) {
GEPVectorIdx[GEP] = Index;
for (User *GEPUser : AllocaUser->users()) {
if (!canVectorizeInst(cast<Instruction>(GEPUser)))
return false;
WorkList.push_back(GEPUser);
}
}
@ -201,12 +223,12 @@ static bool tryPromoteAllocaToVector(AllocaInst *Alloca) {
break;
}
case Instruction::BitCast:
case Instruction::AddrSpaceCast:
break;
default:
Inst->dump();
llvm_unreachable("Do not know how to replace this instruction "
"with vector op");
llvm_unreachable("Inconsistency in instructions promotable to vector");
}
}
return true;

31
test/CodeGen/R600/private-memory-atomics.ll Normal file
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@ -0,0 +1,31 @@
; RUN: llc -verify-machineinstrs -march=r600 -mcpu=SI < %s
; This works because promote allocas pass replaces these with LDS atomics.
; Private atomics have no real use, but at least shouldn't crash on it.
define void @atomicrmw_private(i32 addrspace(1)* %out, i32 %in) nounwind {
entry:
%tmp = alloca [2 x i32]
%tmp1 = getelementptr [2 x i32]* %tmp, i32 0, i32 0
%tmp2 = getelementptr [2 x i32]* %tmp, i32 0, i32 1
store i32 0, i32* %tmp1
store i32 1, i32* %tmp2
%tmp3 = getelementptr [2 x i32]* %tmp, i32 0, i32 %in
%tmp4 = atomicrmw add i32* %tmp3, i32 7 acq_rel
store i32 %tmp4, i32 addrspace(1)* %out
ret void
}
define void @cmpxchg_private(i32 addrspace(1)* %out, i32 %in) nounwind {
entry:
%tmp = alloca [2 x i32]
%tmp1 = getelementptr [2 x i32]* %tmp, i32 0, i32 0
%tmp2 = getelementptr [2 x i32]* %tmp, i32 0, i32 1
store i32 0, i32* %tmp1
store i32 1, i32* %tmp2
%tmp3 = getelementptr [2 x i32]* %tmp, i32 0, i32 %in
%tmp4 = cmpxchg i32* %tmp3, i32 0, i32 1 acq_rel monotonic
%val = extractvalue { i32, i1 } %tmp4, 0
store i32 %val, i32 addrspace(1)* %out
ret void
}

20
test/CodeGen/R600/private-memory-broken.ll Normal file
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@ -0,0 +1,20 @@
; RUN: not llc -verify-machineinstrs -march=r600 -mcpu=SI %s 2>&1 | FileCheck %s
; Make sure promote alloca pass doesn't crash
; CHECK: unsupported call
declare i32 @foo(i32*) nounwind
define void @call_private(i32 addrspace(1)* %out, i32 %in) nounwind {
entry:
%tmp = alloca [2 x i32]
%tmp1 = getelementptr [2 x i32]* %tmp, i32 0, i32 0
%tmp2 = getelementptr [2 x i32]* %tmp, i32 0, i32 1
store i32 0, i32* %tmp1
store i32 1, i32* %tmp2
%tmp3 = getelementptr [2 x i32]* %tmp, i32 0, i32 %in
%val = call i32 @foo(i32* %tmp3) nounwind
store i32 %val, i32 addrspace(1)* %out
ret void
}

16
test/CodeGen/R600/private-memory.ll
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@ -267,5 +267,19 @@ entry:
%load = load i32* %gep2
store i32 %load, i32 addrspace(1)* %out
ret void
}
define void @select_private(i32 addrspace(1)* %out, i32 %in) nounwind {
entry:
%tmp = alloca [2 x i32]
%tmp1 = getelementptr [2 x i32]* %tmp, i32 0, i32 0
%tmp2 = getelementptr [2 x i32]* %tmp, i32 0, i32 1
store i32 0, i32* %tmp1
store i32 1, i32* %tmp2
%cmp = icmp eq i32 %in, 0
%sel = select i1 %cmp, i32* %tmp1, i32* %tmp2
%load = load i32* %sel
store i32 %load, i32 addrspace(1)* %out
ret void
}