Differential D19754 Diff 56079 test/CodeGenObjC/debug-info-nodebug.m

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test/CodeGenObjC/debug-info-nodebug.m

				// RUN: %clang_cc1 -triple arm-apple-ios -emit-llvm -debug-info-kind=limited -fblocks %s -o - \| FileCheck %s
				// Objective-C code cargo-culted from debug-info-lifetime-crash.m.
				@protocol NSObject
				- (id)copy;
				@end
				@class W;
				@interface View1
				@end
				@implementation Controller {
				void (^Block)(void);
				}
				- (void)View:(View1 )View foo:(W )W
				{
				// The reference from inside the block implicitly creates another
				// local variable for the referenced member. That is what gets
				// suppressed by the attribute. It still gets debug info as a
				// member, though.
				// CHECK-NOT: !DILocalVariable(name: "weakSelf"
				dblaikieUnsubmitted Done Reply Inline Actions Is this case outside of the block interesting in some way? It doesn't look like it. dblaikie: Is this case outside of the block interesting in some way? It doesn't look like it.
				probinsonAuthorUnsubmitted Not Done Reply Inline Actions The attribute on "weakSelf" is what triggers the second modified path in CGDebugInfo and suppresses the DILocalVariable for that name. The attribute on "strongSelf" goes through the normal EmitDeclare path. So in that sense, it is not interesting. I should not have been so hesitant to work out what was going on here, sorry about that. My cluelessness about Objective-C knows no bounds. I'm changing the test to verify that the DILocalVariable does not appear, while the member info does still appear, and updating the comment to reflect this new knowledge. probinson: The attribute on "weakSelf" is what triggers the second modified path in CGDebugInfo and…
				// CHECK: !DIDerivedType({{.*}} name: "weakSelf"
				// CHECK-NOT: !DILocalVariable(name: "weakSelf"
				__attribute__((nodebug)) __typeof(self) weakSelf = self;
				Block = [^{
				__typeof(self) strongSelf = weakSelf;
				} copy];
				}
				@end