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AMDGPU: Fix crash if called function is a bitcast

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getCalledFunction() is null, so this would crash. Replace
crash with an error on unsupported call.

llvm-svn: 243461
This commit is contained in:
Matt Arsenault 2015-07-28 18:29:14 +00:00
parent a6a8a2d2b1
commit 16b3f40599
2 changed files with 28 additions and 1 deletions
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7
lib/Target/AMDGPU/AMDGPUPromoteAlloca.cpp
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@ -240,7 +240,12 @@ static bool collectUsesWithPtrTypes(Value *Val, std::vector<Value*> &WorkList) {
for (User *User : Val->users()) {
if(std::find(WorkList.begin(), WorkList.end(), User) != WorkList.end())
continue;
if (isa<CallInst>(User)) {
if (CallInst *CI = dyn_cast<CallInst>(User)) {
// TODO: We might be able to handle some cases where the callee is a
// constantexpr bitcast of a function.
if (!CI->getCalledFunction())
return false;
WorkList.push_back(User);
continue;
}

22
test/CodeGen/AMDGPU/promote-alloca-bitcast-function.ll Normal file
View File

@ -0,0 +1,22 @@
; RUN: not llc -march=amdgcn < %s 2>&1 | FileCheck %s
; Make sure that AMDGPUPromoteAlloca doesn't crash if the called
; function is a constantexpr cast of a function.
declare void @foo(float*) #0
declare void @foo.varargs(...) #0
; CHECK: error: unsupported call to function foo in crash_call_constexpr_cast
define void @crash_call_constexpr_cast() #0 {
%alloca = alloca i32
call void bitcast (void (float*)* @foo to void (i32*)*)(i32* %alloca) #0
ret void
}
define void @crash_call_constexpr_cast_varargs() #0 {
%alloca = alloca i32
call void bitcast (void (...)* @foo.varargs to void (i32*)*)(i32* %alloca) #0
ret void
}
attributes #0 = { nounwind }