llvm/test/Transforms/InstCombine/strcat-1.ll
Stephen Lin 39f4e8d9cc Update Transforms tests to use CHECK-LABEL for easier debugging. No functionality change.
This update was done with the following bash script:

  find test/Transforms -name "*.ll" | \
  while read NAME; do
    echo "$NAME"
    if ! grep -q "^; *RUN: *llc" $NAME; then
      TEMP=`mktemp -t temp`
      cp $NAME $TEMP
      sed -n "s/^define [^@]*@\([A-Za-z0-9_]*\)(.*$/\1/p" < $NAME | \
      while read FUNC; do
        sed -i '' "s/;\(.*\)\([A-Za-z0-9_]*\):\( *\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3@$FUNC(/g" $TEMP
      done
      mv $TEMP $NAME
    fi
  done


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186268 91177308-0d34-0410-b5e6-96231b3b80d8
2013-07-14 01:42:54 +00:00

39 lines
1.1 KiB
LLVM

; Test that the strcat libcall simplifier works correctly per the
; bug found in PR3661.
;
; RUN: opt < %s -instcombine -S | FileCheck %s
target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"
@hello = constant [6 x i8] c"hello\00"
@null = constant [1 x i8] zeroinitializer
@null_hello = constant [7 x i8] c"\00hello\00"
declare i8* @strcat(i8*, i8*)
declare i32 @puts(i8*)
define i32 @main() {
; CHECK-LABEL: @main(
; CHECK-NOT: call i8* @strcat
; CHECK: call i32 @puts
%target = alloca [1024 x i8]
%arg1 = getelementptr [1024 x i8]* %target, i32 0, i32 0
store i8 0, i8* %arg1
; rslt1 = strcat(target, "hello\00")
%arg2 = getelementptr [6 x i8]* @hello, i32 0, i32 0
%rslt1 = call i8* @strcat(i8* %arg1, i8* %arg2)
; rslt2 = strcat(rslt1, "\00")
%arg3 = getelementptr [1 x i8]* @null, i32 0, i32 0
%rslt2 = call i8* @strcat(i8* %rslt1, i8* %arg3)
; rslt3 = strcat(rslt2, "\00hello\00")
%arg4 = getelementptr [7 x i8]* @null_hello, i32 0, i32 0
%rslt3 = call i8* @strcat(i8* %rslt2, i8* %arg4)
call i32 @puts( i8* %rslt3 )
ret i32 0
}