PR3589: Don't simplify libcalls with -ffreestanding.
git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@64599 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/Driver/clang.cpp b/Driver/clang.cpp
index 2f7ce69..d1ef871 100644
--- a/Driver/clang.cpp
+++ b/Driver/clang.cpp
@@ -1271,7 +1271,7 @@
// FIXME: There are llvm-gcc options to control these selectively.
Opts.InlineFunctions = (Opts.OptimizationLevel > 1);
Opts.UnrollLoops = (Opts.OptimizationLevel > 1 && !OptSize);
- Opts.SimplifyLibCalls = 1;
+ Opts.SimplifyLibCalls = !Freestanding;
#ifdef NDEBUG
Opts.VerifyModule = 0;
diff --git a/test/CodeGen/PR3589-freestanding-libcalls.c b/test/CodeGen/PR3589-freestanding-libcalls.c
new file mode 100644
index 0000000..61852e3
--- /dev/null
+++ b/test/CodeGen/PR3589-freestanding-libcalls.c
@@ -0,0 +1,9 @@
+// RUN: clang -emit-llvm %s -o - | grep 'declare i32 @printf' | count 1 &&
+// RUN: clang -O2 -emit-llvm %s -o - | grep 'declare i32 @puts' | count 1 &&
+// RUN: clang -ffreestanding -O2 -emit-llvm %s -o - | grep 'declare i32 @puts' | count 0
+
+#include <stdio.h>
+
+void f0() {
+ printf("hello\n");
+}