Anirudh Prasad 7a49f52054 [AsmParser][SystemZ][z/OS] Implement HLASM location counter syntax ("*") for Z PC-relative instructions. ... - This patch attempts to implement the location counter syntax (*) for the HLASM variant for PC-relative instructions. - In the HLASM variant, for purely constant relocatable values, we expect a * token preceding it, with special support for " *" which is parsed as "<pc-rel-insn 0>" - For combinations of absolute values and relocatable values, we don't expect the "*" preceding the token. When you have a " * " what’s accepted is: ``` *<space>.*{.*} -> <pc-rel-insn> 0 *[+|-][constant-value] -> <pc-rel-insn> [+|-]constant-value ``` When you don’t have a " * " what’s accepted is: ``` brasl 1,func is allowed (MCSymbolRef type) brasl 1,func+4 is allowed (MCBinary type) brasl 1,4+func is allowed (MCBinary type) brasl 1,-4+func is allowed (MCBinary type) brasl 1,func-4 is allowed (MCBinary type) brasl 1,*func is not allowed (* cannot be used for non-MCConstantExprs) brasl 1,*+func is not allowed (* cannot be used for non-MCConstantExprs) brasl 1,*+func+4 is not allowed (* cannot be used for non-MCConstantExprs) brasl 1,*+4+func is not allowed (* cannot be used for non-MCConstantExprs) brasl 1,*-4+8+func is not allowed (* cannot be used for non-MCConstantExprs) ``` Reviewed By: Kai Differential Revision: https://reviews.llvm.org/D100987		2021-05-03 14:58:24 -04:00
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CMakeLists.txt	[AsmParser][SystemZ][z/OS] Re-introduce HLASM comment syntax	2021-03-24 10:17:00 -04:00
SystemZAsmLexerTest.cpp	[AsmParser][SystemZ][z/OS] Implement HLASM location counter syntax ("*") for Z PC-relative instructions.	2021-05-03 14:58:24 -04:00