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llvm-mirror/test/Transforms/ObjCARC/gvn.ll
Stephen Lin f20746afd1 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 01:50:49 +00:00

42 lines
952 B
LLVM

; RUN: opt -S -basicaa -objc-arc-aa -gvn < %s | FileCheck %s
@x = common global i8* null, align 8
declare i8* @objc_retain(i8*)
declare i32 @objc_sync_enter(i8*)
declare i32 @objc_sync_exit(i8*)
; GVN should be able to eliminate this redundant load, with ARC-specific
; alias analysis.
; CHECK: define i8* @test0(i32 %n)
; CHECK-NEXT: entry:
; CHECK-NEXT: %s = load i8** @x
; CHECK-NOT: load
; CHECK: ret i8* %s
; CHECK-NEXT: }
define i8* @test0(i32 %n) nounwind {
entry:
%s = load i8** @x
%0 = tail call i8* @objc_retain(i8* %s) nounwind
%t = load i8** @x
ret i8* %t
}
; GVN should not be able to eliminate this redundant load, with ARC-specific
; alias analysis.
; CHECK-LABEL: define i8* @test1(
; CHECK: load
; CHECK: load
; CHECK: ret i8* %t
; CHECK: }
define i8* @test1(i32 %n) nounwind {
entry:
%s = load i8** @x
%0 = call i32 @objc_sync_enter(i8* %s)
%t = load i8** @x
%1 = call i32 @objc_sync_exit(i8* %s)
ret i8* %t
}