[llvm-objdump] Add warning messages if disassembly + source for problematic inputs

Summary: Addresses https://bugs.llvm.org/show_bug.cgi?id=41905

Reviewers: jhenderson, rupprecht, grimar

Reviewed By: jhenderson, grimar

Subscribers: RKSimon, MaskRay, hiraditya, llvm-commits

Tags: #llvm

Differential Revision: https://reviews.llvm.org/D62462

llvm-svn: 368963

1 files changed, 4 insertions, 2 deletions

diff --git a/llvm/test/tools/llvm-objdump/X86/source-interleave-no-debug-info.test b/llvm/test/tools/llvm-objdump/X86/source-interleave-no-debug-info.test
index 15f7b7ecb22..e4de95daee1 100644
--- a/llvm/test/tools/llvm-objdump/X86/source-interleave-no-debug-info.test
+++ b/llvm/test/tools/llvm-objdump/X86/source-interleave-no-debug-info.test
@@ -1,13 +1,15 @@
 ## Test that if an object has no debug information, only the disassembly is
-## printed when --source is specified.
+## printed when --source is specified, and that we emit a warning.
 
 # RUN: sed -e "s,SRC_COMPDIR,%/p/Inputs,g" %p/Inputs/source-interleave.ll > %t.ll
 # RUN: llc -o %t.o -filetype=obj -mtriple=x86_64-pc-linux %t.ll
 # RUN: llvm-objcopy --strip-debug %t.o %t2.o
 
 # RUN: llvm-objdump --source %t.o | FileCheck %s --check-prefixes=CHECK,SOURCE
-# RUN: llvm-objdump --source %t2.o | FileCheck %s --implicit-check-not='main()'
+# RUN: llvm-objdump --source %t2.o 2> %t2.e | FileCheck %s --check-prefixes=CHECK --implicit-check-not='main()'
+# RUN: FileCheck %s --input-file %t2.e --check-prefixes=WARN
 
+# WARN:        warning: failed to parse debug information for {{.*}}2.o
 # CHECK:       0000000000000010 main:
 # SOURCE-NEXT: ; int main() {
 # CHECK-NEXT:   10:   55                      pushq   %rbp