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llvm-mirror/test/Transforms/InstSimplify/exact-nsw-nuw.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

45 lines
814 B
LLVM

; RUN: opt < %s -instsimplify -S | FileCheck %s
; PR8862
; CHECK-LABEL: @shift1(
; CHECK: ret i32 %A
define i32 @shift1(i32 %A, i32 %B) {
%C = lshr exact i32 %A, %B
%D = shl nuw i32 %C, %B
ret i32 %D
}
; CHECK-LABEL: @shift2(
; CHECK: lshr
; CHECK: ret i32 %D
define i32 @shift2(i32 %A, i32 %B) {
%C = lshr i32 %A, %B
%D = shl nuw i32 %C, %B
ret i32 %D
}
; CHECK-LABEL: @shift3(
; CHECK: ret i32 %A
define i32 @shift3(i32 %A, i32 %B) {
%C = ashr exact i32 %A, %B
%D = shl nuw i32 %C, %B
ret i32 %D
}
; CHECK-LABEL: @shift4(
; CHECK: ret i32 %A
define i32 @shift4(i32 %A, i32 %B) {
%C = shl nuw i32 %A, %B
%D = lshr i32 %C, %B
ret i32 %D
}
; CHECK-LABEL: @shift5(
; CHECK: ret i32 %A
define i32 @shift5(i32 %A, i32 %B) {
%C = shl nsw i32 %A, %B
%D = ashr i32 %C, %B
ret i32 %D
}