Skip the asm prefix when storing the name in block info.

- Otherwise we emit internal names with embedded '\01' characters,
   which confuses some tools.

 - Ideally all the code which wants to get a "display name" for the
   given function should follow one code path, but this should be a
   monotonic improvement for now.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@71774 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/CGBlocks.h

@@ -140,7 +140,7 @@ public:
     /// BlockLiteralTy - The type of the block literal.
     const llvm::Type *BlockLiteralTy;
 
-    /// Name - the name of the function this block was created for, if any
+    /// Name - the name of the function this block was created for, if any.
     const char *Name;
 
     /// ByCopyDeclRefs - Variables from parent scopes that have been imported
@@ -152,7 +152,11 @@ public:
     llvm::SmallVector<const BlockDeclRefExpr *, 8> ByRefDeclRefs;
     
     BlockInfo(const llvm::Type *blt, const char *n)
-      : BlockLiteralTy(blt), Name(n) {}
+      : BlockLiteralTy(blt), Name(n) {
+      // Skip asm prefix, if any.
+      if (Name && Name[0] == '\01')
+        ++Name;
+    }
   };
 
   CGBuilderTy &Builder;

test/CodeGenObjC/blocks.m

@@ -1,4 +1,4 @@
-// RUN: clang-cc -emit-llvm -fblocks -S -o - %s
+// RUN: clang-cc -triple i386-apple-darwin9 -emit-llvm -fblocks -o %t %s &&
 // rdar://6676764
 
 struct S {
@@ -19,9 +19,18 @@ void foo(T *P) {
 -(void) im0;
 @end
 
+// RUN: grep 'define internal i32 @"__-\[A im0\]_block_invoke_"' %t &&
+@implementation A
+-(void) im0 {
+  (void) ^{ return 1; }();
+}
+@end
+
 @interface B : A @end
 @implementation B
 -(void) im1 {
   ^(void) { [super im0]; }();
 }
 @end
+
+// RUN: true