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llvm-mirror/test/Transforms/InstCombine/sub-xor.ll
Stephen Lin cf082ae903 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

llvm-svn: 186268
2013-07-14 01:42:54 +00:00

48 lines
987 B
LLVM

; RUN: opt -instcombine -S < %s | FileCheck %s
define i32 @test1(i32 %x) nounwind {
%and = and i32 %x, 31
%sub = sub i32 63, %and
ret i32 %sub
; CHECK-LABEL: @test1(
; CHECK-NEXT: and i32 %x, 31
; CHECK-NEXT: xor i32 %and, 63
; CHECK-NEXT: ret
}
declare i32 @llvm.ctlz.i32(i32, i1) nounwind readnone
define i32 @test2(i32 %x) nounwind {
%count = tail call i32 @llvm.ctlz.i32(i32 %x, i1 true) nounwind readnone
%sub = sub i32 31, %count
ret i32 %sub
; CHECK-LABEL: @test2(
; CHECK-NEXT: ctlz
; CHECK-NEXT: xor i32 %count, 31
; CHECK-NEXT: ret
}
define i32 @test3(i32 %x) nounwind {
%and = and i32 %x, 31
%sub = xor i32 31, %and
%add = add i32 %sub, 42
ret i32 %add
; CHECK-LABEL: @test3(
; CHECK-NEXT: and i32 %x, 31
; CHECK-NEXT: sub i32 73, %and
; CHECK-NEXT: ret
}
define i32 @test4(i32 %x) nounwind {
%sub = xor i32 %x, 2147483648
%add = add i32 %sub, 42
ret i32 %add
; CHECK-LABEL: @test4(
; CHECK-NEXT: add i32 %x, -2147483606
; CHECK-NEXT: ret
}