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authorReid Spencer <rspencer@reidspencer.com>2005-05-03 00:50:43 +0000
committerReid Spencer <rspencer@reidspencer.com>2005-05-03 00:50:43 +0000
commitd2db880222cfc8ac471a1fa4c3a5a83309c1d595 (patch)
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Add a new test case for the StrNCmpOptimization.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@21658 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'test/Transforms/SimplifyLibCalls/StrNCmp.ll')
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diff --git a/test/Transforms/SimplifyLibCalls/StrNCmp.ll b/test/Transforms/SimplifyLibCalls/StrNCmp.ll
new file mode 100644
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--- /dev/null
+++ b/test/Transforms/SimplifyLibCalls/StrNCmp.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 %strncmp(sbyte*,sbyte*,int)
+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 %strncmp(sbyte* %hello_p, sbyte* %hello_p,int 5)
+ %temp2 = call int %strncmp(sbyte* %null_p, sbyte* %null_p,int 0)
+ %temp3 = call int %strncmp(sbyte* %hello_p, sbyte* %null_p,int 0)
+ %temp4 = call int %strncmp(sbyte* %null_p, sbyte* %hello_p,int 0)
+ %temp5 = call int %strncmp(sbyte* %hell_p, sbyte* %hello_p,int 4)
+ %rslt1 = add int %temp1, %temp2
+ %rslt2 = add int %rslt1, %temp3
+ %rslt3 = add int %rslt2, %temp4
+ %rslt4 = add int %rslt3, %temp5
+ ret int %rslt4
+}