Remove hard-coded constant in Transforms/InstCombine/memcmp-1.ll

Transforms/InstCombine/memcmp-1.ll has a test case that looks like:

  @foo = constant [4 x i8] c"foo\00"
  @hel = constant [4 x i8] c"hel\00"

  ...

  %mem1 = getelementptr [4 x i8]* @hel, i32 0, i32 0
  %mem2 = getelementptr [4 x i8]* @foo, i32 0, i32 0
  %ret = call i32 @memcmp(i8* %mem1, i8* %mem2, i32 3)
  ret i32 %ret
  ; CHECK: ret i32 2

The folded return value (2 above) is computed using the system memcmp
that the compiler is linked with.  This can return different values on
different systems.  The test was originally written on an OS X 10.7.5
x86-64 box and passed.  However, it failed on one of the x86-64 FreeBSD
buildbots because the system memcpy on that machine returned a different
value (1 instead of 2).

I fixed the test by checking the folding constants with regexes.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@167691 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/InstCombine/memcmp-1.ll b/test/Transforms/InstCombine/memcmp-1.ll
index 862fd3a85abc8ea18f474c2563c66985964062e3..4238c5f8fb153280b5b02b442ca66ee19b7979f9 100644 (file)
--- a/test/Transforms/InstCombine/memcmp-1.ll
+++ b/test/Transforms/InstCombine/memcmp-1.ll
@@ -59,5 +59,14 @@ define i32 @test_simplify5() {
   %mem2 = getelementptr [4 x i8]* @foo, i32 0, i32 0
   %ret = call i32 @memcmp(i8* %mem1, i8* %mem2, i32 3)
   ret i32 %ret
-; CHECK: ret i32 2
+; CHECK: ret i32 {{[0-9]+}}
+}
+
+define i32 @test_simplify6() {
+; CHECK: @test_simplify6
+  %mem1 = getelementptr [4 x i8]* @foo, i32 0, i32 0
+  %mem2 = getelementptr [4 x i8]* @hel, i32 0, i32 0
+  %ret = call i32 @memcmp(i8* %mem1, i8* %mem2, i32 3)
+  ret i32 %ret
+; CHECK: ret i32 {{-[0-9]+}}
 }