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Viewing changes to test/Transforms/SimplifyLibCalls/StrNCpy.ll

  • Committer: Package Import Robot
  • Author(s): Sylvestre Ledru
  • Date: 2012-03-29 19:09:51 UTC
  • Revision ID: package-import@ubuntu.com-20120329190951-aq83ivog4cg8bxun
Tags: upstream-3.1~svn153643
Import upstream version 3.1~svn153643

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test/Transforms/SimplifyLibCalls/StrNCpy.ll
 
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; Test that the StrNCpyOptimizer works correctly
 
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; RUN: opt < %s -simplify-libcalls -S | \
 
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; RUN:   not grep {call.*strncpy}
 
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; This transformation requires the pointer size, as it assumes that size_t is
 
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; the size of a pointer.
 
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target datalayout = "-p:64:64:64"
 
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@hello = constant [6 x i8] c"hello\00"          ; <[6 x i8]*> [#uses=1]
 
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@null = constant [1 x i8] zeroinitializer               ; <[1 x i8]*> [#uses=1]
 
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@null_hello = constant [7 x i8] c"\00hello\00"          ; <[7 x i8]*> [#uses=1]
 
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declare i8* @strncpy(i8*, i8*, i32)
 
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declare i32 @puts(i8*)
 
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define i32 @main() {
 
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        %target = alloca [1024 x i8]            ; <[1024 x i8]*> [#uses=1]
 
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        %arg1 = getelementptr [1024 x i8]* %target, i32 0, i32 0                ; <i8*> [#uses=2]
 
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        store i8 0, i8* %arg1
 
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        %arg2 = getelementptr [6 x i8]* @hello, i32 0, i32 0            ; <i8*> [#uses=1]
 
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        %rslt1 = call i8* @strncpy( i8* %arg1, i8* %arg2, i32 6 )               ; <i8*> [#uses=1]
 
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        %arg3 = getelementptr [1 x i8]* @null, i32 0, i32 0             ; <i8*> [#uses=1]
 
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        %rslt2 = call i8* @strncpy( i8* %rslt1, i8* %arg3, i32 42 )             ; <i8*> [#uses=1]
 
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        %arg4 = getelementptr [7 x i8]* @null_hello, i32 0, i32 0               ; <i8*> [#uses=1]
 
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        %rslt3 = call i8* @strncpy( i8* %rslt2, i8* %arg4, i32 42 )             ; <i8*> [#uses=1]
 
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        call i32 @puts( i8* %rslt3 )            ; <i32>:1 [#uses=0]
 
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        ret i32 0
 
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}