llvm-6502/test/Transforms/InstCombine/strncat-2.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

54 lines
1.5 KiB
LLVM

; Test that the strncat libcall simplifier works correctly.
;
; 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"
@empty = constant [1 x i8] c"\00"
@a = common global [32 x i8] zeroinitializer, align 1
declare i8* @strncat(i8*, i8*, i32)
define void @test_simplify1() {
; CHECK-LABEL: @test_simplify1(
; CHECK-NOT: call i8* @strncat
; CHECK: ret void
%dst = getelementptr [32 x i8]* @a, i32 0, i32 0
%src = getelementptr [6 x i8]* @hello, i32 0, i32 0
call i8* @strncat(i8* %dst, i8* %src, i32 13)
ret void
}
define void @test_simplify2() {
; CHECK-LABEL: @test_simplify2(
; CHECK-NEXT: ret void
%dst = getelementptr [32 x i8]* @a, i32 0, i32 0
%src = getelementptr [1 x i8]* @empty, i32 0, i32 0
call i8* @strncat(i8* %dst, i8* %src, i32 13)
ret void
}
define void @test_simplify3() {
; CHECK-LABEL: @test_simplify3(
; CHECK-NEXT: ret void
%dst = getelementptr [32 x i8]* @a, i32 0, i32 0
%src = getelementptr [6 x i8]* @hello, i32 0, i32 0
call i8* @strncat(i8* %dst, i8* %src, i32 0)
ret void
}
define void @test_nosimplify1() {
; CHECK-LABEL: @test_nosimplify1(
; CHECK: call i8* @strncat
; CHECK: ret void
%dst = getelementptr [32 x i8]* @a, i32 0, i32 0
%src = getelementptr [6 x i8]* @hello, i32 0, i32 0
call i8* @strncat(i8* %dst, i8* %src, i32 1)
ret void
}