From: Richard Smith <richard-llvm@metafoo.co.uk>
Date: Wed, 19 Apr 2017 21:15:45 +0000 (+0000)
Subject: Fix assertion failure in codegen on non-template deduction guide.
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=e6df5fb1026dda5b4c81363c802532b10e5f15c5;p=clang

Fix assertion failure in codegen on non-template deduction guide.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@300762 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/CodeGen/CodeGenModule.cpp b/lib/CodeGen/CodeGenModule.cpp
index d84c543dee..19203973ff 100644
--- a/lib/CodeGen/CodeGenModule.cpp
+++ b/lib/CodeGen/CodeGenModule.cpp
@@ -3794,6 +3794,10 @@ void CodeGenModule::EmitTopLevelDecl(Decl *D) {
     AddDeferredUnusedCoverageMapping(D);
     break;
 
+  case Decl::CXXDeductionGuide:
+    // Function-like, but does not result in code emission.
+    break;
+
   case Decl::Var:
   case Decl::Decomposition:
     // Skip variable templates
diff --git a/test/CodeGenCXX/cxx1z-class-deduction.cpp b/test/CodeGenCXX/cxx1z-class-deduction.cpp
new file mode 100644
index 0000000000..6f8333b13d
--- /dev/null
+++ b/test/CodeGenCXX/cxx1z-class-deduction.cpp
@@ -0,0 +1,21 @@
+// RUN: %clang_cc1 -std=c++1z %s -emit-llvm -o - | FileCheck %s
+
+template<typename T> struct A {
+  A(T = 0);
+  A(void*);
+};
+
+template<typename T> A(T*) -> A<long>;
+A() -> A<int>;
+
+// CHECK-LABEL: @_Z1fPi(
+void f(int *p) {
+  // CHECK: @_ZN1AIiEC
+  A a{};
+
+  // CHECK: @_ZN1AIlEC
+  A b = p;
+
+  // CHECK: @_ZN1AIxEC
+  A c = 123LL;
+}