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Avoid matching prefixes of a symbol as arm registers #1807

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merged 3 commits into from
Aug 27, 2024
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Avoid matching prefixes of a symbol as arm registers #1807

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9afe966
Add boundary condition to arm register rule
torben-hansen Aug 27, 2024
b11fcf1
Add test case for correct matching
torben-hansen Aug 27, 2024
c8ce45c
Use correct symbol form
torben-hansen Aug 27, 2024
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3 changes: 2 additions & 1 deletion util/fipstools/delocate/delocate.peg
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Original file line number Diff line number Diff line change
Expand Up @@ -88,10 +88,11 @@ RegisterOrConstant <- (('%'[[A-Z]][[A-Z0-9]]*) /
![fb:(+\-]
ARMConstantTweak <- ((([us] "xt" [xwhb]) / "lsl" / "lsr" / "ror" / "asr") (WS '#'? Offset)?)/
"mul vl" # multiply offset by the hardware's vector length
ARMRegister <- "sp" / ([xwdqshb] [0-9] [0-9]?) / "xzr" / "wzr" / "NZCV" / ARMVectorRegister / SVE2PredicateRegister /
ARMRegister <- "sp" / ([xwdqshb] [0-9] [0-9]? !(ARMRegisterBoundary)) / "xzr" / "wzr" / "NZCV" / ARMVectorRegister / SVE2PredicateRegister /
('{' WS? ARMVectorRegister WS? ([,\-] WS? ARMVectorRegister)* WS? '}' ('[' [0-9] [0-9]? ']')? )
ARMVectorRegister <- [vz] [0-9] [0-9]? ('.' [0-9]* [bsdhq] ('[' [0-9] [0-9]? ']')? )?
SVE2PredicateRegister <- "p" [0-9] [0-9]? "/" [mMzZ]
ARMRegisterBoundary <- [a-zA-Z0-9_]
# Compilers only output a very limited number of expression forms. Rather than
# implement a full expression parser, this enumerate those forms plus a few
# that appear in our hand-written assembly.
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