Make the recent COFF debug info tests more readable

llvm-svn: 204902

3 files changed, 6 insertions, 2 deletions

diff --git a/llvm/test/DebugInfo/COFF/asan.ll b/llvm/test/DebugInfo/COFF/asan-module-ctor.ll
index c1d8e75292c..c1d8e75292c 100644
--- a/llvm/test/DebugInfo/COFF/asan.ll
+++ b/llvm/test/DebugInfo/COFF/asan-module-ctor.ll
diff --git a/llvm/test/DebugInfo/COFF/asan2.ll b/llvm/test/DebugInfo/COFF/asan-module-without-functions.ll
index d1f19085ece..419faa0e0f3 100644
--- a/llvm/test/DebugInfo/COFF/asan2.ll
+++ b/llvm/test/DebugInfo/COFF/asan-module-without-functions.ll
@@ -4,8 +4,9 @@
 ; -fsanitize=address
 ; D:\asan.c:
 ; 1 unsigned char c = 42;
-
-; Just make sure we don't try to emit the line table.
+;
+; This file defines no functions, so just make sure we don't try to emit
+; the line table for functions of zero size.
 ; X86-NOT: .section        .debug$S,"rn"
 
 ; ModuleID = 'asan.c'
diff --git a/llvm/test/DebugInfo/COFF/pr19239.ll b/llvm/test/DebugInfo/COFF/tail-call-without-lexical-scopes.ll
index 3c0de6a9a02..b0b87a4b6f9 100644
--- a/llvm/test/DebugInfo/COFF/pr19239.ll
+++ b/llvm/test/DebugInfo/COFF/tail-call-without-lexical-scopes.ll
@@ -11,6 +11,9 @@
 ; 7 void spam(void) {
 ; 8   bar(42);
 ; 9 }
+;
+; The bar function happens to have no lexical scopes, yet it has one instruction
+; with debug information available.
 
 ; X86-LABEL: {{^}}"?bar@@YAXHZZ":
 ; X86-NEXT: # BB