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llvm-6502/test/Transforms/ObjCARC/empty-block.ll

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When eliminating unnecessary retain+autorelease on return values, handle the case where the retain is in a different basic block. rdar://10210274. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140815 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-29 22:27:34 +00:00
; RUN: opt -S -objc-arc < %s | FileCheck %s
; rdar://10210274
%0 = type opaque
declare i8* @objc_retain(i8*)
declare void @objc_release(i8*)
declare i8* @objc_autoreleaseReturnValue(i8*)
; Don't delete the autorelease.
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 $NAME fi done git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186269 91177308-0d34-0410-b5e6-96231b3b80d8
2013-07-14 01:50:49 +00:00
; CHECK-LABEL: define %0* @test0(
When eliminating unnecessary retain+autorelease on return values, handle the case where the retain is in a different basic block. rdar://10210274. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140815 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-29 22:27:34 +00:00
; CHECK: @objc_retain
; CHECK: .lr.ph:
; CHECK-NOT: @objc_r
; CHECK: @objc_autoreleaseReturnValue
; CHECK-NOT: @objc_
; CHECK: }
define %0* @test0(%0* %buffer) nounwind {
%1 = bitcast %0* %buffer to i8*
%2 = tail call i8* @objc_retain(i8* %1) nounwind
br i1 undef, label %.lr.ph, label %._crit_edge
.lr.ph: ; preds = %.lr.ph, %0
br i1 false, label %.lr.ph, label %._crit_edge
._crit_edge: ; preds = %.lr.ph, %0
%3 = tail call i8* @objc_retain(i8* %1) nounwind
tail call void @objc_release(i8* %1) nounwind, !clang.imprecise_release !0
%4 = tail call i8* @objc_autoreleaseReturnValue(i8* %1) nounwind
ret %0* %buffer
}
; Do delete the autorelease, even with the retain in a different block.
Catch more CHECK that can be converted to CHECK-LABEL in Transforms for easier debugging. No functionality change. This conversion was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186269 91177308-0d34-0410-b5e6-96231b3b80d8
2013-07-14 01:50:49 +00:00
; CHECK-LABEL: define %0* @test1(
When eliminating unnecessary retain+autorelease on return values, handle the case where the retain is in a different basic block. rdar://10210274. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@140815 91177308-0d34-0410-b5e6-96231b3b80d8
2011-09-29 22:27:34 +00:00
; CHECK-NOT: @objc
; CHECK: }
define %0* @test1() nounwind {
%buffer = call %0* @foo()
%1 = bitcast %0* %buffer to i8*
%2 = tail call i8* @objc_retain(i8* %1) nounwind
br i1 undef, label %.lr.ph, label %._crit_edge
.lr.ph: ; preds = %.lr.ph, %0
br i1 false, label %.lr.ph, label %._crit_edge
._crit_edge: ; preds = %.lr.ph, %0
%3 = tail call i8* @objc_retain(i8* %1) nounwind
tail call void @objc_release(i8* %1) nounwind, !clang.imprecise_release !0
%4 = tail call i8* @objc_autoreleaseReturnValue(i8* %1) nounwind
ret %0* %buffer
}
declare %0* @foo()
!0 = metadata !{}
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