If we are compiling with -fno-builtin then don't do constant folding of

builtins.

This fixes PR11711.

llvm-svn: 147655

1 files changed, 20 insertions, 0 deletions

diff --git a/clang/test/CodeGen/no-builtin.c b/clang/test/CodeGen/no-builtin.c
new file mode 100644
index 00000000000..ff1c1924817
--- /dev/null
+++ b/clang/test/CodeGen/no-builtin.c
@@ -0,0 +1,20 @@
+// RUN: %clang_cc1 -fno-builtin -emit-llvm %s -o - | FileCheck %s
+//
+// Check that -fno-builtin prevents us from constant-folding through builtins
+// (PR11711)
+
+double
+cos(double x)
+{
+  printf("ok\n");
+  exit(0);
+}
+
+int
+main(int argc, char *argv[])
+{
+  cos(1); // CHECK: cos
+  printf("not ok\n");
+  abort();
+}
+