be4f571107
We're moving ARC optimisation and ARC emission in clang away from runtime methods and towards intrinsics. This is the part which actually uses the intrinsics in the ARC optimizer when both analyzing the existing calls and emitting new ones. Differential Revision: https://reviews.llvm.org/D55348 Reviewers: ahatanak llvm-svn: 349534
113 lines
4.5 KiB
LLVM
113 lines
4.5 KiB
LLVM
; RUN: opt -mtriple x86_64-unknown-windows-msvc -objc-arc -S -o - %s | FileCheck %s
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; bool g();
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; id h();
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;
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; void f() {
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; id a = nullptr;
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; if (g())
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; a = h();
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; id b = nullptr;
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; g();
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; }
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declare zeroext i1 @"\01?g@@YA_NXZ"() local_unnamed_addr
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declare i8* @"\01?h@@YAPEAUobjc_object@@XZ"() local_unnamed_addr
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declare dllimport void @llvm.objc.release(i8*) local_unnamed_addr
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declare dllimport i8* @llvm.objc.retainAutoreleasedReturnValue(i8* returned) local_unnamed_addr
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declare i32 @__CxxFrameHandler3(...)
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define void @"\01?f@@YAXXZ"() local_unnamed_addr personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
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entry:
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%call = invoke zeroext i1 @"\01?g@@YA_NXZ"()
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to label %invoke.cont unwind label %ehcleanup6
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invoke.cont: ; preds = %entry
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br i1 %call, label %if.then, label %if.end
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if.then: ; preds = %invoke.cont
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%call2 = invoke i8* @"\01?h@@YAPEAUobjc_object@@XZ"()
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to label %invoke.cont1 unwind label %ehcleanup6
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invoke.cont1: ; preds = %if.then
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%0 = tail call i8* @llvm.objc.retainAutoreleasedReturnValue(i8* %call2)
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tail call void @llvm.objc.release(i8* null), !clang.imprecise_release !1
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br label %if.end
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if.end: ; preds = %invoke.cont1, %invoke.cont
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%a.0 = phi i8* [ %call2, %invoke.cont1 ], [ null, %invoke.cont ]
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%call4 = invoke zeroext i1 @"\01?g@@YA_NXZ"()
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to label %invoke.cont3 unwind label %ehcleanup
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invoke.cont3: ; preds = %if.end
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tail call void @llvm.objc.release(i8* null), !clang.imprecise_release !1
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tail call void @llvm.objc.release(i8* %a.0), !clang.imprecise_release !1
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ret void
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ehcleanup: ; preds = %if.end
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%1 = cleanuppad within none []
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call void @llvm.objc.release(i8* null) [ "funclet"(token %1) ], !clang.imprecise_release !1
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cleanupret from %1 unwind label %ehcleanup6
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ehcleanup6: ; preds = %ehcleanup, %if.then, %entry
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%a.1 = phi i8* [ %a.0, %ehcleanup ], [ null, %if.then ], [ null, %entry ]
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%2 = cleanuppad within none []
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call void @llvm.objc.release(i8* %a.1) [ "funclet"(token %2) ], !clang.imprecise_release !1
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cleanupret from %2 unwind to caller
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}
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; CHECK-LABEL: ?f@@YAXXZ
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; CHECK: call void @llvm.objc.release(i8* {{.*}}) {{.*}}[ "funclet"(token %1) ]
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; CHECK-NOT: call void @llvm.objc.release(i8* {{.*}}) {{.*}}[ "funclet"(token %2) ]
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define void @"\01?i@@YAXXZ"() local_unnamed_addr personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
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entry:
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%call = invoke zeroext i1 @"\01?g@@YA_NXZ"()
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to label %invoke.cont unwind label %ehcleanup6
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invoke.cont: ; preds = %entry
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br i1 %call, label %if.then, label %if.end
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if.then: ; preds = %invoke.cont
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%call2 = invoke i8* @"\01?h@@YAPEAUobjc_object@@XZ"()
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to label %invoke.cont1 unwind label %ehcleanup6
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invoke.cont1: ; preds = %if.then
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%0 = tail call i8* @llvm.objc.retainAutoreleasedReturnValue(i8* %call2)
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tail call void @llvm.objc.release(i8* null), !clang.imprecise_release !1
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br label %if.end
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if.end: ; preds = %invoke.cont1, %invoke.cont
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%a.0 = phi i8* [ %call2, %invoke.cont1 ], [ null, %invoke.cont ]
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%call4 = invoke zeroext i1 @"\01?g@@YA_NXZ"()
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to label %invoke.cont3 unwind label %ehcleanup
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invoke.cont3: ; preds = %if.end
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tail call void @llvm.objc.release(i8* null), !clang.imprecise_release !1
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tail call void @llvm.objc.release(i8* %a.0), !clang.imprecise_release !1
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ret void
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ehcleanup: ; preds = %if.end
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%1 = cleanuppad within none []
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call void @llvm.objc.release(i8* null) [ "funclet"(token %1) ], !clang.imprecise_release !1
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br label %ehcleanup.1
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ehcleanup.1:
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cleanupret from %1 unwind label %ehcleanup6
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ehcleanup6: ; preds = %ehcleanup, %if.then, %entry
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%a.1 = phi i8* [ %a.0, %ehcleanup.1 ], [ null, %if.then ], [ null, %entry ]
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%2 = cleanuppad within none []
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call void @llvm.objc.release(i8* %a.1) [ "funclet"(token %2) ], !clang.imprecise_release !1
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cleanupret from %2 unwind to caller
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}
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; CHECK-LABEL: ?i@@YAXXZ
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; CHECK: call void @llvm.objc.release(i8* {{.*}}) {{.*}}[ "funclet"(token %1) ]
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; CHECK-NOT: call void @llvm.objc.release(i8* {{.*}}) {{.*}}[ "funclet"(token %2) ]
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!1 = !{}
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