Don't use section name for section start symbol if later symbol exists


Bugzilla Link	PR41946
Status	NEW
Importance	P enhancement
Reported by	James Henderson (jh7370.2008@my.bristol.ac.uk)
Reported on	2019-05-20 08:50:21 -0700
Last modified on	2020-12-09 13:56:28 -0800
Version	trunk
Hardware	PC Windows NT
CC	llvm-bugs@lists.llvm.org, yuanfang.chen@sony.com
Fixed by commit(s)
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llvm-objdump currently prints the section name as a symbol label for the first
address in a section being disassembled, if there are no other symbols
targeting the location. However, GNU objdump prints an expression relative to
the first symbol in the section:

objdump -d test.o

test.o:     file format elf64-x86-64

Disassembly of section .text:

0000000000001000 <sym-0x1>:
    1000:       90                      nop

0000000000001001 <sym>:
    1001:       90                      nop

llvm-objdump  -d test.o

test.o:   file format ELF64-x86-64

Disassembly of section .text:

0000000000001000 .text:
    1000: 90                            nop

0000000000001001 sym:
    1001: 90                            nop

We should consider doing what GNU does here. The section name is not useful,
since it's the same as in the "Disassembly of section" and could be confused
with an actual section symbol at that location.

Quuxplusone / LLVMBugzillaTest

Don't use section name for section start symbol if later symbol exists #40916