Merge c007fbb19879f9b597b47ae772c53e53cdc65f29 into 18.x

[brad0]

[PATCH] MipsAsmParser/O32: Don't add redundant $ to $-prefixed symbol
in the la macro (#80644)

When parsing the la macro, we add a duplicate $ prefix in
getOrCreateSymbol,
leading to error: Undefined temporary symbol $$yy for code like:

xx:
	la	$2,$yy
$yy:
	nop

Remove the duplicate prefix.

In addition, recognize .L-prefixed symbols as local for O32.

See: #65020.

[brad0]

/cherry-pick c007fbb

[llvmbot]

/pull-request #81810

[llvmbot]

@llvm/issue-subscribers-backend-mips

Author: Brad Smith (brad0)

[PATCH] MipsAsmParser/O32: Don't add redundant $ to $-prefixed symbol in the la macro (#80644)

When parsing the la macro, we add a duplicate $ prefix in
getOrCreateSymbol,
leading to error: Undefined temporary symbol $$yy for code like:

xx:
	la	$2,$yy
$yy:
	nop

Remove the duplicate prefix.

In addition, recognize .L-prefixed symbols as local for O32.

See: #65020.