From: Yaxun Liu <Yaxun.Liu@amd.com>
Date: Tue, 24 Oct 2017 19:14:43 +0000 (+0000)
Subject: CodeGen: Fix missing debug loc due to alloca
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=c7d0ffff6897138067f69d777fd99130c379794b;p=clang

CodeGen: Fix missing debug loc due to alloca

Builder save/restores insertion pointer when emitting addr space cast
for alloca, but does not save/restore debug loc, which causes verifier
failure for certain call instructions.

This patch fixes that.

Differential Revision: https://reviews.llvm.org/D39069


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@316484 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/CGExpr.cpp b/lib/CodeGen/CGExpr.cpp
index 2eb6d0a0c0..6837377de8 100644
--- a/lib/CodeGen/CGExpr.cpp
+++ b/lib/CodeGen/CGExpr.cpp
@@ -74,12 +74,11 @@ Address CodeGenFunction::CreateTempAlloca(llvm::Type *Ty, CharUnits Align,
   // cast alloca to the default address space when necessary.
   if (CastToDefaultAddrSpace && getASTAllocaAddressSpace() != LangAS::Default) {
     auto DestAddrSpace = getContext().getTargetAddressSpace(LangAS::Default);
-    auto CurIP = Builder.saveIP();
+    llvm::IRBuilderBase::InsertPointGuard IPG(Builder);
     Builder.SetInsertPoint(AllocaInsertPt);
     V = getTargetHooks().performAddrSpaceCast(
         *this, V, getASTAllocaAddressSpace(), LangAS::Default,
         Ty->getPointerTo(DestAddrSpace), /*non-null*/ true);
-    Builder.restoreIP(CurIP);
   }
 
   return Address(V, Align);
diff --git a/test/CodeGenOpenCL/func-call-dbg-loc.cl b/test/CodeGenOpenCL/func-call-dbg-loc.cl
new file mode 100644
index 0000000000..4ed082fa9f
--- /dev/null
+++ b/test/CodeGenOpenCL/func-call-dbg-loc.cl
@@ -0,0 +1,18 @@
+// RUN: %clang_cc1 -triple amdgcn---amdgizcl -debug-info-kind=limited -O0 -emit-llvm -o - %s | FileCheck %s
+
+typedef struct
+{
+    int a;
+} Struct;
+
+Struct func1();
+
+void func2(Struct S);
+
+void func3()
+{
+    // CHECK: call i32 @func1() #{{[0-9]+}}, !dbg ![[LOC:[0-9]+]]
+    // CHECK: call void @func2(i32 %{{[0-9]+}}) #{{[0-9]+}}, !dbg ![[LOC]]
+    func2(func1());
+}
+