llvm-project/llvm/test/Transforms/EarlyCSE/instsimplify-dom.ll

; RUN: opt -early-cse -S < %s | FileCheck %s
; PR12231

declare i32 @f()

define i32 @fn() {
entry:
  br label %lbl_1215

lbl_1215:
  %ins34 = phi i32 [ %ins35, %xxx ], [ undef, %entry ]
  ret i32 %ins34

xxx:
  %ins35 = call i32 @f()
  br label %lbl_1215
}

; CHECK-LABEL: define i32 @fn(
Fix regression from r151466: an we can't replace uses of an instruction reachable from the entry block with uses of an instruction not reachable from the entry block. PR12231. llvm-svn: 152595 2012-03-13 09:06:07 +08:00			`; RUN: opt -early-cse -S < %s \| FileCheck %s`
			`; PR12231`

			`declare i32 @f()`

			`define i32 @fn() {`
			`entry:`
			`br label %lbl_1215`

			`lbl_1215:`
			`%ins34 = phi i32 [ %ins35, %xxx ], [ undef, %entry ]`
			`ret i32 %ins34`

			`xxx:`
			`%ins35 = call i32 @f()`
			`br label %lbl_1215`
			`}`

Catch more CHECK that can be converted to CHECK-LABEL in Transforms for easier debugging. No functionality change. This conversion 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/;\(.\)\([A-Za-z0-9_]\):\( \)define\([^@]\)@$FUNC\([( ]*\)\$/;\1\2-LABEL:\3define\4@$FUNC(/g" $TEMP done mv $TEMP $NAME fi done llvm-svn: 186269 2013-07-14 09:50:49 +08:00			`; CHECK-LABEL: define i32 @fn(`