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llvm-project/llvm/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. llvm-svn: 140815
2011-09-30 06:27:34 +08:00
; 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 $NAME fi done llvm-svn: 186269
2013-07-14 09:50:49 +08:00
; CHECK-LABEL: define %0* @test0(
When eliminating unnecessary retain+autorelease on return values, handle the case where the retain is in a different basic block. rdar://10210274. llvm-svn: 140815
2011-09-30 06:27:34 +08:00
; CHECK: @objc_retain
; CHECK: .lr.ph:
; CHECK-NOT: @objc_r
; CHECK: @objc_autoreleaseReturnValue
; CHECK-NOT: @objc_
; CHECK: }
define %0* @test0(%0* %buffer) nounwind {
%1 = bitcast %0* %buffer to i8*
%2 = tail call i8* @objc_retain(i8* %1) nounwind
br i1 undef, label %.lr.ph, label %._crit_edge
.lr.ph: ; preds = %.lr.ph, %0
br i1 false, label %.lr.ph, label %._crit_edge
._crit_edge: ; preds = %.lr.ph, %0
%3 = tail call i8* @objc_retain(i8* %1) nounwind
tail call void @objc_release(i8* %1) nounwind, !clang.imprecise_release !0
%4 = tail call i8* @objc_autoreleaseReturnValue(i8* %1) nounwind
ret %0* %buffer
}
; Do delete the autorelease, even with the retain in a different block.
Catch more CHECK that can be converted to CHECK-LABEL in Transforms for easier debugging. No functionality change. This conversion was done with the following bash script: find test/Transforms -name "*.ll" | \ while read NAME; do echo "$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 llvm-svn: 186269
2013-07-14 09:50:49 +08:00
; 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. llvm-svn: 140815
2011-09-30 06:27:34 +08:00
; 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()
IR: Make metadata typeless in assembly Now that `Metadata` is typeless, reflect that in the assembly. These are the matching assembly changes for the metadata/value split in r223802. - Only use the `metadata` type when referencing metadata from a call intrinsic -- i.e., only when it's used as a `Value`. - Stop pretending that `ValueAsMetadata` is wrapped in an `MDNode` when referencing it from call intrinsics. So, assembly like this: define @foo(i32 %v) { call void @llvm.foo(metadata !{i32 %v}, metadata !0) call void @llvm.foo(metadata !{i32 7}, metadata !0) call void @llvm.foo(metadata !1, metadata !0) call void @llvm.foo(metadata !3, metadata !0) call void @llvm.foo(metadata !{metadata !3}, metadata !0) ret void, !bar !2 } !0 = metadata !{metadata !2} !1 = metadata !{i32* @global} !2 = metadata !{metadata !3} !3 = metadata !{} turns into this: define @foo(i32 %v) { call void @llvm.foo(metadata i32 %v, metadata !0) call void @llvm.foo(metadata i32 7, metadata !0) call void @llvm.foo(metadata i32* @global, metadata !0) call void @llvm.foo(metadata !3, metadata !0) call void @llvm.foo(metadata !{!3}, metadata !0) ret void, !bar !2 } !0 = !{!2} !1 = !{i32* @global} !2 = !{!3} !3 = !{} I wrote an upgrade script that handled almost all of the tests in llvm and many of the tests in cfe (even handling many `CHECK` lines). I've attached it (or will attach it in a moment if you're speedy) to PR21532 to help everyone update their out-of-tree testcases. This is part of PR21532. llvm-svn: 224257
2014-12-16 03:07:53 +08:00
!0 = !{}