Commit Graph

3 Commits

Author SHA1 Message Date
Oliver Stannard c507b370a1 [ARM] Remove tCPS alias which just crashed
This alias caused a crash when trying to print the "cps #0" instruction in a
diagnostic for thumbv6 (which doesn't have that instruction).
	    
The comment was incorrect, this instruction is UNPREDICTABLE if no flag bits
are set, so I don't think it's worth keeping.

Differential Revision: https://reviews.llvm.org/D39191

llvm-svn: 316420
2017-10-24 08:55:36 +00:00
Oliver Stannard e093bad472 [ARM] Use new assembler diags for ARM
This converts the ARM AsmParser to use the new assembly matcher error
reporting mechanism, which allows errors to be reported for multiple
instruction encodings when it is ambiguous which one the user intended
to use.

By itself this doesn't improve many error messages, because we don't have
diagnostic text for most operand types, but as we add that then this will allow
more of those diagnostic strings to be used when they are relevant.

Differential revision: https://reviews.llvm.org/D31530

llvm-svn: 314779
2017-10-03 10:26:11 +00:00
Oliver Stannard 1ae8b476f4 [Thumb] 32-bit encodings of 'cps' are not valid for v7M
v7M only allows the 16-bit encoding of the 'cps' (Change Processor
State) instruction, and does not have the 32-bit encoding which is
valid from v6T2 onwards.

llvm-svn: 218382
2014-09-24 14:20:01 +00:00