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AMDGPU/SI: Handle aliases in AMDGPUAlwaysInlinePass 

Summary:
Simply replace usage of aliases to functions with aliasee.
This came up when bitcode linking to builtin library and
calls to aliases not being resolved.

Also made minor improvements to existing test.

Reviewers: tstellarAMD, alex-t, vpykhtin

Subscribers: arsenm, wdng, rampitec

Differential Revision: https://reviews.llvm.org/D24023

llvm-svn: 280221
This commit is contained in:
Nikolay Haustov 2016-08-31 11:18:33 +00:00
parent 75b1fb9b9e
commit eba808957e
2 changed files with 37 additions and 0 deletions
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12
llvm/lib/Target/AMDGPU/AMDGPUAlwaysInlinePass.cpp
View File

@ -35,8 +35,20 @@ public:
char AMDGPUAlwaysInline::ID = 0;
bool AMDGPUAlwaysInline::runOnModule(Module &M) {
std::vector<GlobalAlias*> AliasesToRemove;
std::vector<Function *> FuncsToClone;
for (GlobalAlias &A : M.aliases()) {
if (Function* F = dyn_cast<Function>(A.getAliasee())) {
A.replaceAllUsesWith(F);
AliasesToRemove.push_back(&A);
}
}
for (GlobalAlias* A : AliasesToRemove) {
A->eraseFromParent();
}
for (Function &F : M) {
if (!F.hasLocalLinkage() && !F.isDeclaration() && !F.use_empty() &&
!F.hasFnAttribute(Attribute::NoInline))

25
llvm/test/CodeGen/AMDGPU/inline-calls.ll
View File

@ -10,6 +10,7 @@ entry:
}
; CHECK: {{^}}kernel:
; CHECK-NOT: call
define void @kernel(i32 addrspace(1)* %out) {
entry:
%tmp0 = call i32 @func(i32 1)
@ -18,8 +19,32 @@ entry:
}
; CHECK: {{^}}kernel2:
; CHECK-NOT: call
define void @kernel2(i32 addrspace(1)* %out) {
entry:
call void @kernel(i32 addrspace(1)* %out)
ret void
}
; CHECK-NOT: func_alias
@func_alias = alias i32 (i32), i32 (i32)* @func
; CHECK: {{^}}kernel3:
; CHECK-NOT: call
define void @kernel3(i32 addrspace(1)* %out) {
entry:
%tmp0 = call i32 @func_alias(i32 1)
store i32 %tmp0, i32 addrspace(1)* %out
ret void
}
; CHECK-NOT: kernel_alias
@kernel_alias = alias void (i32 addrspace(1)*), void (i32 addrspace(1)*)* @kernel
; CHECK: {{^}}kernel4:
; CHECK-NOT: call
define void @kernel4(i32 addrspace(1)* %out) {
entry:
call void @kernel_alias(i32 addrspace(1)* %out)
ret void
}