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# 426437d1 27-Jan-2022 Fangrui Song <i@maskray.me>

[MC] Add MCAsmParser::parseRParen to improve consistency and simplify code

Some diagnostics are more verbose but they don't seem to be more useful than
simple `expected ')'`


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# 8ad70b35 04-Dec-2013 David Peixotto <dpeixott@codeaurora.org>

Add support for parsing ARM symbol variants on ELF targets

ARM symbol variants are written with parens instead of @ like this:

.word __GLOBAL_I_a(target1)

This commit adds support for parsing th

Add support for parsing ARM symbol variants on ELF targets

ARM symbol variants are written with parens instead of @ like this:

.word __GLOBAL_I_a(target1)

This commit adds support for parsing these symbol variants in
expressions. We introduce a new flag to MCAsmInfo that indicates the
parser should use parens to parse the symbol variant. The expression
parser is modified to look for symbol variants using parens instead
of @ when the corresponding MCAsmInfo flag is true.

The MCAsmInfo parens flag is enabled only for ARM on ELF.

By adding this flag to MCAsmInfo, we are able to get rid of
redundant ARM-specific symbol variants and use the generic variants
instead (e.g. VK_GOT instead of VK_ARM_GOT). We use the new
UseParensForSymbolVariant attribute in MCAsmInfo to correctly print
the symbol variants for arm.

To achive this we need to keep a handle to the MCAsmInfo in the
MCSymbolRefExpr class that we can check when printing the symbol
variant.

Updated Tests:
Changed case of symbol variant to match the generic kind.
test/CodeGen/ARM/tls-models.ll
test/CodeGen/ARM/tls1.ll
test/CodeGen/ARM/tls2.ll
test/CodeGen/Thumb2/tls1.ll
test/CodeGen/Thumb2/tls2.ll

PR18080

llvm-svn: 196424

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