Properly promote operands when optimizing a single-character memcmp.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@104648 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/test/Transforms/SimplifyLibCalls/memcmp.ll b/test/Transforms/SimplifyLibCalls/memcmp.ll
index 640d232..ee99501 100644
--- a/test/Transforms/SimplifyLibCalls/memcmp.ll
+++ b/test/Transforms/SimplifyLibCalls/memcmp.ll
@@ -1,5 +1,5 @@
; Test that the memcmpOptimizer works correctly
-; RUN: opt < %s -simplify-libcalls -S | not grep {call.*memcmp}
+; RUN: opt < %s -simplify-libcalls -S | FileCheck %s
@h = constant [2 x i8] c"h\00" ; <[2 x i8]*> [#uses=0]
@hel = constant [4 x i8] c"hel\00" ; <[4 x i8]*> [#uses=0]
@@ -9,14 +9,26 @@
define void @test(i8* %P, i8* %Q, i32 %N, i32* %IP, i1* %BP) {
%A = call i32 @memcmp( i8* %P, i8* %P, i32 %N ) ; <i32> [#uses=1]
+; CHECK-NOT: call {{.*}} memcmp
+; CHECK: volatile store
volatile store i32 %A, i32* %IP
%B = call i32 @memcmp( i8* %P, i8* %Q, i32 0 ) ; <i32> [#uses=1]
+; CHECK-NOT: call {{.*}} memcmp
+; CHECK: volatile store
volatile store i32 %B, i32* %IP
%C = call i32 @memcmp( i8* %P, i8* %Q, i32 1 ) ; <i32> [#uses=1]
+; CHECK: load
+; CHECK: zext
+; CHECK: load
+; CHECK: zext
+; CHECK: sub
+; CHECK: volatile store
volatile store i32 %C, i32* %IP
%F = call i32 @memcmp(i8* getelementptr ([4 x i8]* @hel, i32 0, i32 0),
i8* getelementptr ([8 x i8]* @hello_u, i32 0, i32 0),
i32 3)
+; CHECK-NOT: call {{.*}} memcmp
+; CHECK: volatile store
volatile store i32 %F, i32* %IP
ret void
}