From eba808957e15290e4ade5d3a80c31c0e36bdd7bd Mon Sep 17 00:00:00 2001
From: Nikolay Haustov <Nikolay.Haustov@amd.com>
Date: Wed, 31 Aug 2016 11:18:33 +0000
Subject: 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
---
 llvm/lib/Target/AMDGPU/AMDGPUAlwaysInlinePass.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

(limited to 'llvm/lib/Target/AMDGPU')

diff --git a/llvm/lib/Target/AMDGPU/AMDGPUAlwaysInlinePass.cpp b/llvm/lib/Target/AMDGPU/AMDGPUAlwaysInlinePass.cpp
index 63f5fb3cdf0..886b1b0f2b2 100644
--- a/llvm/lib/Target/AMDGPU/AMDGPUAlwaysInlinePass.cpp
+++ b/llvm/lib/Target/AMDGPU/AMDGPUAlwaysInlinePass.cpp
@@ -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))
-- 
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