Correctly emit certain implicit references to 'self' even within
a lambda.

Bug #1 is that CGF's CurFuncDecl was "stuck" at lambda invocation
functions.  Fix that by generally improving getNonClosureContext
to look through lambdas and captured statements but only report
code contexts, which is generally what's wanted.  Audit uses of
CurFuncDecl and getNonClosureAncestor for correctness.

Bug #2 is that lambdas weren't specially mapping 'self' when inside
an ObjC method.  Fix that by removing the requirement for that
and using the normal EmitDeclRefLValue path in LoadObjCSelf.

rdar://13800041

llvm-svn: 181000
diff --git a/clang/test/CodeGenObjC/debug-info-block-captured-self.m b/clang/test/CodeGenObjC/debug-info-block-captured-self.m
index 0316013..183e91b 100644
--- a/clang/test/CodeGenObjC/debug-info-block-captured-self.m
+++ b/clang/test/CodeGenObjC/debug-info-block-captured-self.m
@@ -59,7 +59,6 @@
 // CHECK:        call void @llvm.dbg.declare(metadata !{i8* [[BLOCK_DESC]]}, metadata ![[BDMD:[0-9]+]])
 // CHECK:        %[[TMP1:.*]] = bitcast
 // CHECK-NEXT:   store
-// CHECK-NEXT:   %[[TMP2:.*]] = getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>* %[[TMP1]]
 // CHECK:        call void @llvm.dbg.declare(metadata !{<{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>** {{.*}}}, metadata ![[SELF:.*]])
 // make sure we are still in the same function
 // CHECK: define {{.*}}__copy_helper_block_
diff --git a/clang/test/CodeGenObjC/debug-info-blocks.m b/clang/test/CodeGenObjC/debug-info-blocks.m
index f50ddf0..3d91c9e 100644
--- a/clang/test/CodeGenObjC/debug-info-blocks.m
+++ b/clang/test/CodeGenObjC/debug-info-blocks.m
@@ -7,11 +7,10 @@
 // CHECK: define {{.*}}_block_invoke
 // CHECK: %[[BLOCK:.*]] = bitcast i8* %.block_descriptor to <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>*, !dbg
 // CHECK-NEXT: store <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>* %[[BLOCK]], <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>** %[[ALLOCA:.*]], align
-// CHECK-NEXT: getelementptr inbounds <{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>* %[[BLOCK]], i32 0, i32 5
 // CHECK-NEXT: call void @llvm.dbg.declare(metadata !{<{ i8*, i32, i32, i8*, %struct.__block_descriptor*, %0* }>** %[[ALLOCA]]}, metadata ![[SELF:[0-9]+]])
 // CHECK-NEXT: call void @llvm.dbg.declare(metadata !{%1** %d}, metadata ![[D:[0-9]+]])
-// CHECK: ![[SELF]] = {{.*}} [ DW_TAG_auto_variable ] [self] [line 52]
-// CHECK: ![[D]] = {{.*}} [d] [line 50]
+// CHECK: ![[SELF]] = {{.*}} [ DW_TAG_auto_variable ] [self] [line 51]
+// CHECK: ![[D]] = {{.*}} [d] [line 49]
 
 typedef unsigned int NSUInteger;
 
diff --git a/clang/test/CodeGenObjCXX/lambda-expressions.mm b/clang/test/CodeGenObjCXX/lambda-expressions.mm
index 7c1e2e4..c73e172 100644
--- a/clang/test/CodeGenObjCXX/lambda-expressions.mm
+++ b/clang/test/CodeGenObjCXX/lambda-expressions.mm
@@ -38,6 +38,28 @@
 // ARC: define internal i32 @___Z2f2v_block_invoke
 // ARC: call i32 @"_ZZ2f2vENK3$_1clEv
 
+template <class T> void take_lambda(T &&lambda) { lambda(); }
+void take_block(void (^block)()) { block(); }
+
+// rdar://13800041
+@interface A
+- (void) test;
+@end
+@interface B : A @end
+@implementation B
+- (void) test {
+  take_block(^{
+      take_lambda([=]{
+          take_block(^{
+              take_lambda([=] {
+                  [super test];
+              });
+          });
+      });
+   });
+}
+@end
+
 // ARC: attributes [[NUW]] = { nounwind{{.*}} }
 
 // MRC: attributes [[NUW]] = { nounwind{{.*}} }