1 files changed, 18 insertions, 0 deletions
diff --git a/test/Transforms/InstCombine/strstr-2.ll b/test/Transforms/InstCombine/strstr-2.ll
new file mode 100644
index 0000000..5092f9b
--- /dev/null
+++ b/test/Transforms/InstCombine/strstr-2.ll
@@ -0,0 +1,18 @@
+; Test that the strstr library call simplifier works correctly.
+;
+; RUN: opt < %s -instcombine -S | FileCheck %s
+
+target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
+
+@null = private constant [1 x i8] zeroinitializer
+
+declare i8 @strstr(i8*, i8*)
+
+define i8 @test_no_simplify1(i8* %str) {
+; CHECK: @test_no_simplify1
+  %pat = getelementptr inbounds [1 x i8]* @null, i32 0, i32 0
+  %ret = call i8 @strstr(i8* %str, i8* %pat)
+; CHECK-NEXT: call i8 @strstr
+  ret i8 %ret
+; CHECK-NEXT: ret i8 %ret
+}