If we are compiling with -fno-builtin then don't do constant folding of
builtins.
This fixes PR11711.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@147655 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/CGBuiltin.cpp b/lib/CodeGen/CGBuiltin.cpp
index 3e5a677..f462ee6 100644
--- a/lib/CodeGen/CGBuiltin.cpp
+++ b/lib/CodeGen/CGBuiltin.cpp
@@ -175,7 +175,8 @@
unsigned BuiltinID, const CallExpr *E) {
// See if we can constant fold this builtin. If so, don't emit it at all.
Expr::EvalResult Result;
- if (E->EvaluateAsRValue(Result, CGM.getContext()) &&
+ if (!getContext().getLangOptions().NoBuiltin &&
+ E->EvaluateAsRValue(Result, CGM.getContext()) &&
!Result.hasSideEffects()) {
if (Result.Val.isInt())
return RValue::get(llvm::ConstantInt::get(getLLVMContext(),
diff --git a/test/CodeGen/no-builtin.c b/test/CodeGen/no-builtin.c
new file mode 100644
index 0000000..ff1c192
--- /dev/null
+++ b/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();
+}
+
