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llvm-project/clang/test/CodeGen/mangle-blocks.c

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CodeGen: correct mangling for blocks This addresses a regression introduced with SVN r219393. A block may be contained within another block. In such a scenario, we would end up within a BlockDecl, which is not a NamedDecl (as the names are synthesised). The cast to a NamedDecl of the DeclContext would then assert as the types are unrelated. Restore the mangling behaviour to that prior to SVN r219393. If the current block is contained within a BlockDecl, walk up to the parent DeclContext, recursively, until we have a non-BlockDecl. This is expected to be a NamedDecl. Add in a couple of asserts to ensure that the assumption that we only encounter a block within a NamedDecl or a BlockDecl. llvm-svn: 219696
2014-10-15 01:20:14 +08:00
// RUN: %clang_cc1 -triple i386-apple-ios -fblocks -emit-llvm -o - %s | FileCheck %s
void __assert_rtn(const char *, const char *, int, const char *)
__attribute__ (( noreturn ));
void invoke(void (^)(void));
void mangle(void) {
invoke(^{ invoke(^{ __assert_rtn(__func__, __FILE__, __LINE__, "mangle"); }); });
}
// CHECK: @__func__.__mangle_block_invoke_2 = private unnamed_addr constant [24 x i8] c"__mangle_block_invoke_2\00", align 1
// CHECK: @.str = private unnamed_addr constant {{.*}}, align 1
// CHECK: @.str1 = private unnamed_addr constant [7 x i8] c"mangle\00", align 1
// CHECK: define internal void @__mangle_block_invoke(i8* %.block_descriptor)
// CHECK: define internal void @__mangle_block_invoke_2(i8* %.block_descriptor){{.*}}{
// CHECK: call void @__assert_rtn(i8* getelementptr inbounds ([24 x i8]* @__func__.__mangle_block_invoke_2, i32 0, i32 0), i8* getelementptr inbounds {{.*}}, i32 8, i8* getelementptr inbounds ([7 x i8]* @.str1, i32 0, i32 0))
// CHECK: }