1 files changed, 33 insertions, 0 deletions
diff --git a/clang/test/CodeGen/integer-overflow.c b/clang/test/CodeGen/integer-overflow.c
new file mode 100644
index 00000000000..79692161042
--- /dev/null
+++ b/clang/test/CodeGen/integer-overflow.c
@@ -0,0 +1,33 @@
+// RUN: %clang_cc1 %s -emit-llvm -o - | FileCheck %s --check-prefix=DEFAULT
+// RUN: %clang_cc1 %s -emit-llvm -o - -fwrapv | FileCheck %s --check-prefix=WRAPV
+// RUN: %clang_cc1 %s -emit-llvm -o - -ftrapv | FileCheck %s --check-prefix=TRAPV
+
+
+// Tests for signed integer overflow stuff.
+// rdar://7432000 rdar://7221421
+void test1() {
+  // DEFAULT: define void @test1
+  // WRAPV: define void @test1
+  // TRAPV: define void @test1
+  extern volatile int f11G, a, b;
+  
+  // DEFAULT: add nsw i32
+  // WRAPV: add i32
+  // TRAPV: llvm.sadd.with.overflow.i32
+  f11G = a + b;
+  
+  // DEFAULT: sub nsw i32
+  // WRAPV: sub i32
+  // TRAPV: llvm.ssub.with.overflow.i32
+  f11G = a - b;
+  
+  // DEFAULT: sub nsw i32 0, 
+  // WRAPV: sub i32 0, 
+  // TRAPV: sub nsw i32 0, 
+  f11G = -a;
+  
+  // DEFAULT: mul nsw i32
+  // WRAPV: mul i32
+  // TRAPV: llvm.smul.with.overflow.i32
+  f11G = a * b;
+}