llvm/clang/test/Modules/ASTSignature.c

// RUN: rm -rf %t
// RUN: %clang_cc1             -iquote %S/Inputs/ASTHash/ -fsyntax-only \
// RUN:   -fmodules -fimplicit-module-maps -fmodules-strict-context-hash \
// RUN:   -fmodules-cache-path=%t -fdisable-module-hash %s
// RUN: cp %t/MyHeader2.pcm %t1.pcm
// RUN: rm -rf %t
// RUN: %clang_cc1 -nostdinc++ -iquote %S/Inputs/ASTHash/ -fsyntax-only \
// RUN:   -fmodules -fimplicit-module-maps -fmodules-strict-context-hash \
// RUN:   -fmodules-cache-path=%t -fdisable-module-hash %s
// RUN: cp %t/MyHeader2.pcm %t2.pcm
// RUN: llvm-bcanalyzer --dump --disable-histogram --show-binary-blobs %t1.pcm > %t1.dump
// RUN: llvm-bcanalyzer --dump --disable-histogram --show-binary-blobs %t2.pcm > %t2.dump
// RUN: cat %t1.dump %t2.dump | FileCheck %s

#include "my_header_2.h"

my_int var = 42;

// CHECK:     <AST_BLOCK_HASH abbrevid={{[0-9]+}}/> blob data = '[[AST_BLOCK_HASH:.*]]'
// CHECK:     <SIGNATURE abbrevid={{[0-9]+}}/> blob data = '[[SIGNATURE:.*]]'
// CHECK:     <AST_BLOCK_HASH abbrevid={{[0-9]+}}/> blob data = '[[AST_BLOCK_HASH]]'
// CHECK-NOT: <SIGNATURE abbrevid={{[0-9]+}}/> blob data = '[[SIGNATURE]]'
// The modules built by this test are designed to yield the same AST but distinct AST files.
// If this test fails, it means that either the AST block has become non-relocatable,
// or the file signature stopped hashing some parts of the AST file.