A new test case for the StrCmpOptimization in -simplify-libcalls.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21623 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/test/Transforms/SimplifyLibCalls/StrCmp.ll b/test/Transforms/SimplifyLibCalls/StrCmp.ll
new file mode 100644 (file)
index 0000000..96a5dc8
--- /dev/null
+++ b/test/Transforms/SimplifyLibCalls/StrCmp.ll
@@ -0,0 +1,26 @@
+; Test that the StrCmpOptimizer works correctly
+; RUN: llvm-as < %s | opt -simplify-libcalls | llvm-dis | not grep 'call.*strcmp'
+
+declare int %strcmp(sbyte*,sbyte*)
+declare int %puts(sbyte*)
+%hello = constant [6 x sbyte] c"hello\00"
+%hell = constant [5 x sbyte] c"hell\00"
+%null = constant [1 x sbyte] c"\00"
+
+implementation   ; Functions:
+
+int %main () {
+  %hello_p = getelementptr [6 x sbyte]* %hello, int 0, int 0
+  %hell_p  = getelementptr [5 x sbyte]* %hell, int 0, int 0
+  %null_p  = getelementptr [1 x sbyte]* %null, int 0, int 0
+  %temp1 = call int %strcmp(sbyte* %hello_p, sbyte* %hello_p)
+  %temp2 = call int %strcmp(sbyte* %null_p, sbyte* %null_p)
+  %temp3 = call int %strcmp(sbyte* %hello_p, sbyte* %null_p)
+  %temp4 = call int %strcmp(sbyte* %null_p, sbyte* %hello_p)
+  %temp5 = call int %strcmp(sbyte* %hell_p, sbyte* %hello_p)
+  %rslt1 = add int %temp1, %temp2
+  %rslt2 = add int %rslt1, %temp3
+  %rslt3 = add int %rslt2, %temp4
+  %rslt4 = add int %rslt3, %temp5
+  ret int %rslt4
+}