Vendor import of clang release_32 branch r168974 (effectively, 3.2 RC2):

http://llvm.org/svn/llvm-project/cfe/branches/release_32@168974

1 files changed, 64 insertions, 0 deletions

diff --git a/test/CodeGen/fp-contract-pragma.cpp b/test/CodeGen/fp-contract-pragma.cpp
new file mode 100644
index 0000000..afd8c43
--- /dev/null
+++ b/test/CodeGen/fp-contract-pragma.cpp
@@ -0,0 +1,64 @@
+// RUN: %clang_cc1 -O3 -emit-llvm -o - %s | FileCheck %s
+
+// Is FP_CONTRACT is 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
+  #pragma STDC FP_CONTRACT ON
+  return a * b + c;
+}
+
+// Is FP_CONTRACT state cleared on exiting compound statements?
+float fp_contract_2(float a, float b, float c) {
+// CHECK: _Z13fp_contract_2fff
+// CHECK: %[[M:.+]] = fmul float %a, %b
+// CHECK-NEXT: fadd float %[[M]], %c
+  {
+    #pragma STDC FP_CONTRACT ON
+  }
+  return a * b + c;  
+}
+
+// Does FP_CONTRACT survive template instatiation?
+class Foo {};
+Foo operator+(Foo, Foo);
+
+template <typename T>
+T template_muladd(T a, T b, T c) {
+  #pragma STDC FP_CONTRACT ON
+  return a * b + c;
+}
+
+float fp_contract_3(float a, float b, float c) {
+// CHECK: _Z13fp_contract_3fff
+// CHECK: tail call float @llvm.fmuladd
+  return template_muladd<float>(a, b, c);
+}
+
+template<typename T> class fp_contract_4 {
+  float method(float a, float b, float c) {
+    #pragma STDC FP_CONTRACT ON
+    return a * b + c;
+  }
+};
+
+template class fp_contract_4<int>;
+// CHECK: _ZN13fp_contract_4IiE6methodEfff
+// CHECK: tail call float @llvm.fmuladd
+
+// Check file-scoped FP_CONTRACT
+#pragma STDC FP_CONTRACT ON
+float fp_contract_5(float a, float b, float c) {
+// CHECK: _Z13fp_contract_5fff
+// CHECK: tail call float @llvm.fmuladd
+  return a * b + c;
+}
+
+#pragma STDC FP_CONTRACT OFF
+float fp_contract_6(float a, float b, float c) {
+// CHECK: _Z13fp_contract_6fff
+// CHECK: %[[M:.+]] = fmul float %a, %b
+// CHECK-NEXT: fadd float %[[M]], %c
+  return a * b + c;
+}
+