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compiler.cfg.gvn: with the change to vreg>vn, must check-redundancy on *any* insn that defs a vreg

db4
Alex Vondrak 2011-06-18 15:32:53 -07:00 committed by John Benediktsson
parent ad0a2e78b3
commit d6641eddb3
1 changed files with 1 additions and 8 deletions
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9
extra/compiler/cfg/gvn/gvn.factor
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@ -36,9 +36,6 @@ GENERIC: process-instruction ( insn -- insn' )
[ redundant-instruction ] [ useful-instruction ] ?if ;
M: insn process-instruction
dup rewrite [ process-instruction ] [ ] ?if ;
M: foldable-insn process-instruction
dup rewrite
[ process-instruction ]
[ dup defs-vregs length 1 = [ check-redundancy ] when ] ?if ;
@ -46,17 +43,13 @@ M: foldable-insn process-instruction
M: ##copy process-instruction
dup [ src>> vreg>vn ] [ dst>> ] bi set-vn ;
M: ##phi process-instruction
dup rewrite
[ process-instruction ] [ check-redundancy ] ?if ;
M: array process-instruction
[ process-instruction ] map ;
: value-numbering-step ( insns -- insns' )
[ process-instruction ] map flatten ;
! XXX there's going to be trouble with certain rewrites that
! FIXME there's going to be trouble with certain rewrites that
! modify the cfg / instructions destructively; namely those in
! comparisons.factor, alien.factor, and slots.factor