[MC] - Teach llvm-mc to handle comdats whose names are numbers.

Currently llvm-mc ignores COMDATs whose names are numbers,
for example following code:

.section .foo,"G",@progbits,123,comdat

would produce no COMDATs at all.

Patch fixes the issue. 

Differential revision: https://reviews.llvm.org/D41552

llvm-svn: 321419

1 files changed, 28 insertions, 0 deletions

diff --git a/llvm/test/MC/ELF/comdat-name-number.s b/llvm/test/MC/ELF/comdat-name-number.s
new file mode 100644
index 00000000000..21e2ed7399f
--- /dev/null
+++ b/llvm/test/MC/ELF/comdat-name-number.s
@@ -0,0 +1,28 @@
+// RUN: llvm-mc -triple x86_64-pc-linux-gnu %s -filetype=obj -o %t.o 
+// RUN: llvm-readobj -elf-section-groups %t.o | FileCheck %s
+
+// Test that we can handle numeric COMDAT names.
+
+.section .foo,"G",@progbits,123,comdat
+.section .bar,"G",@progbits,abc,comdat
+
+// CHECK:      Groups {
+// CHECK-NEXT:   Group {
+// CHECK-NEXT:     Name: .group
+// CHECK-NEXT:     Index:
+// CHECK-NEXT:     Type: COMDAT
+// CHECK-NEXT:     Signature: 123
+// CHECK-NEXT:     Section(s) in group [
+// CHECK-NEXT:       .foo
+// CHECK-NEXT:     ]
+// CHECK-NEXT:   }
+// CHECK-NEXT:   Group {
+// CHECK-NEXT:     Name: .group
+// CHECK-NEXT:     Index:
+// CHECK-NEXT:     Type: COMDAT
+// CHECK-NEXT:     Signature: abc
+// CHECK-NEXT:     Section(s) in group [
+// CHECK-NEXT:       .bar
+// CHECK-NEXT:     ]
+// CHECK-NEXT:   }
+// CHECK-NEXT: }