Add testcase for r188873: MCTextAtom boundaries.

Check that they are correctly computed if the last instruction is
larger than 1 byte.

llvm-svn: 188923

llvm/test/Object/X86/objdump-cfg-textatomsize.yaml

@@ -0,0 +1,39 @@
+# RUN: yaml2obj -format=elf %s | llvm-objdump -d -yaml-cfg=%t - && FileCheck --check-prefix=CFG < %t %s
+# REQUIRES: shell
+#
+# Generated from:
+# main:
+# .LBL0_1:
+# 	jmp	.LBL0_1
+#
+
+!ELF
+FileHeader:
+  Class: ELFCLASS64
+  Data: ELFDATA2LSB
+  Type: ET_REL
+  Machine: EM_X86_64
+Sections:
+  - Name: .text
+    Type: SHT_PROGBITS
+    Flags: [ SHF_ALLOC, SHF_EXECINSTR ]
+    Content: "EBFE"
+
+## 0000000000000000 <main>:
+
+#CFG: Atoms:
+#CFG:   - StartAddress:    0x0000000000000000
+#CFG:     Size:            2
+
+##    0:   eb fe          jmp $-2
+#CFG:       - Inst:            JMP_1
+#CFG:         Size:            2
+#CFG:         Ops:             [ I-2 ]
+
+Symbols:
+  Global:
+    - Name: main
+      Type: STT_FUNC
+      Section: .text
+      Value: 0x0
+      Size: 2