Vendor import of clang trunk r256633:vendor/clang/clang-trunk-r256633

https://llvm.org/svn/llvm-project/cfe/trunk@256633

1 files changed, 14 insertions, 2 deletions

diff --git a/test/CodeGen/fp-contract-pragma.cpp b/test/CodeGen/fp-contract-pragma.cpp
index b4e24b9e6824..1c5921a53f97 100644
--- a/test/CodeGen/fp-contract-pragma.cpp
+++ b/test/CodeGen/fp-contract-pragma.cpp
@@ -1,6 +1,6 @@
 // RUN: %clang_cc1 -O3 -triple %itanium_abi_triple -emit-llvm -o - %s | FileCheck %s
 
-// Is FP_CONTRACT is honored in a simple case?
+// Is FP_CONTRACT honored in a simple case?
 float fp_contract_1(float a, float b, float c) {
 // CHECK: _Z13fp_contract_1fff
 // CHECK: tail call float @llvm.fmuladd
@@ -19,7 +19,7 @@ float fp_contract_2(float a, float b, float c) {
   return a * b + c;  
 }
 
-// Does FP_CONTRACT survive template instatiation?
+// Does FP_CONTRACT survive template instantiation?
 class Foo {};
 Foo operator+(Foo, Foo);
 
@@ -62,3 +62,15 @@ float fp_contract_6(float a, float b, float c) {
   return a * b + c;
 }
 
+// If the multiply has multiple uses, don't produce fmuladd.
+// This used to assert (PR25719):
+// https://llvm.org/bugs/show_bug.cgi?id=25719
+
+float fp_contract_7(float a, float b, float c) {
+// CHECK: _Z13fp_contract_7fff
+// CHECK:  %[[M:.+]] = fmul float %b, 2.000000e+00
+// CHECK-NEXT: fsub float %[[M]], %c
+  #pragma STDC FP_CONTRACT ON
+  return (a = 2 * b) - c;
+}
+