compiler.cfg.ssa.liveness: remove unused pass
Slava Pestov
parent
732f57f31d
commit
9cea3f2c93
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@ -1,291 +0,0 @@
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! Copyright (C) 2009 Daniel Ehrenberg
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! See http://factorcode.org/license.txt for BSD license.
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USING: kernel tools.test namespaces sequences vectors accessors sets
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arrays math.ranges assocs
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cpu.architecture
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compiler.cfg
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compiler.cfg.ssa.liveness.private
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compiler.cfg.ssa.liveness
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compiler.cfg.debugger
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compiler.cfg.instructions
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compiler.cfg.predecessors
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compiler.cfg.registers
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compiler.cfg.dominance
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compiler.cfg.def-use ;
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IN: compiler.cfg.ssa.liveness
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[ t ] [ { 1 } 1 only? ] unit-test
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[ t ] [ { } 1 only? ] unit-test
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[ f ] [ { 2 1 } 1 only? ] unit-test
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[ f ] [ { 2 } 1 only? ] unit-test
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: test-liveness ( -- )
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cfg new 0 get >>entry
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dup compute-defs
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dup compute-uses
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needs-dominance
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precompute-liveness ;
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V{
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T{ ##peek f 0 D 0 }
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T{ ##replace f 0 D 0 }
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T{ ##replace f 1 D 1 }
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} 0 test-bb
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V{
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T{ ##replace f 2 D 0 }
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} 1 test-bb
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V{
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T{ ##replace f 3 D 0 }
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} 2 test-bb
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0 { 1 2 } edges
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[ ] [ test-liveness ] unit-test
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[ H{ } ] [ back-edge-targets get ] unit-test
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[ t ] [ 0 get R_q { 0 1 2 } [ get ] map unique = ] unit-test
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[ t ] [ 1 get R_q { 1 } [ get ] map unique = ] unit-test
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[ t ] [ 2 get R_q { 2 } [ get ] map unique = ] unit-test
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: self-T_q ( n -- ? )
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get [ T_q ] [ 1array unique ] bi = ;
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[ t ] [ 0 self-T_q ] unit-test
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[ t ] [ 1 self-T_q ] unit-test
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[ t ] [ 2 self-T_q ] unit-test
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[ f ] [ 0 0 get live-in? ] unit-test
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[ t ] [ 1 0 get live-in? ] unit-test
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[ t ] [ 2 0 get live-in? ] unit-test
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[ t ] [ 3 0 get live-in? ] unit-test
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[ f ] [ 0 0 get live-out? ] unit-test
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[ f ] [ 1 0 get live-out? ] unit-test
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[ t ] [ 2 0 get live-out? ] unit-test
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[ t ] [ 3 0 get live-out? ] unit-test
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[ f ] [ 0 1 get live-in? ] unit-test
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[ f ] [ 1 1 get live-in? ] unit-test
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[ t ] [ 2 1 get live-in? ] unit-test
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[ f ] [ 3 1 get live-in? ] unit-test
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[ f ] [ 0 1 get live-out? ] unit-test
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[ f ] [ 1 1 get live-out? ] unit-test
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[ f ] [ 2 1 get live-out? ] unit-test
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[ f ] [ 3 1 get live-out? ] unit-test
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[ f ] [ 0 2 get live-in? ] unit-test
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[ f ] [ 1 2 get live-in? ] unit-test
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[ f ] [ 2 2 get live-in? ] unit-test
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[ t ] [ 3 2 get live-in? ] unit-test
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[ f ] [ 0 2 get live-out? ] unit-test
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[ f ] [ 1 2 get live-out? ] unit-test
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[ f ] [ 2 2 get live-out? ] unit-test
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[ f ] [ 3 2 get live-out? ] unit-test
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V{ } 0 test-bb
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V{ } 1 test-bb
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V{ } 2 test-bb
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V{ } 3 test-bb
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V{
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T{ ##phi f 2 H{ { 2 0 } { 3 1 } } }
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} 4 test-bb
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test-diamond
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[ ] [ test-liveness ] unit-test
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[ t ] [ 0 1 get live-in? ] unit-test
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[ t ] [ 1 1 get live-in? ] unit-test
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[ f ] [ 2 1 get live-in? ] unit-test
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[ t ] [ 0 1 get live-out? ] unit-test
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[ t ] [ 1 1 get live-out? ] unit-test
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[ f ] [ 2 1 get live-out? ] unit-test
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[ t ] [ 0 2 get live-in? ] unit-test
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[ f ] [ 1 2 get live-in? ] unit-test
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[ f ] [ 2 2 get live-in? ] unit-test
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[ f ] [ 0 2 get live-out? ] unit-test
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[ f ] [ 1 2 get live-out? ] unit-test
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[ f ] [ 2 2 get live-out? ] unit-test
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[ f ] [ 0 3 get live-in? ] unit-test
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[ t ] [ 1 3 get live-in? ] unit-test
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[ f ] [ 2 3 get live-in? ] unit-test
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[ f ] [ 0 3 get live-out? ] unit-test
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[ f ] [ 1 3 get live-out? ] unit-test
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[ f ] [ 2 3 get live-out? ] unit-test
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[ f ] [ 0 4 get live-in? ] unit-test
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[ f ] [ 1 4 get live-in? ] unit-test
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[ f ] [ 2 4 get live-in? ] unit-test
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[ f ] [ 0 4 get live-out? ] unit-test
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[ f ] [ 1 4 get live-out? ] unit-test
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[ f ] [ 2 4 get live-out? ] unit-test
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! This is the CFG in Figure 3 from the paper
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V{ } 0 test-bb
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V{ } 1 test-bb
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0 1 edge
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V{ } 2 test-bb
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1 2 edge
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V{
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T{ ##peek f 0 D 0 }
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T{ ##peek f 1 D 0 }
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T{ ##peek f 2 D 0 }
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} 3 test-bb
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V{ } 11 test-bb
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2 { 3 11 } edges
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V{
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T{ ##replace f 0 D 0 }
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} 4 test-bb
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V{ } 8 test-bb
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3 { 8 4 } edges
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V{
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T{ ##replace f 1 D 0 }
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} 9 test-bb
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8 9 edge
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V{
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T{ ##replace f 2 D 0 }
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} 5 test-bb
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4 5 edge
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V{ } 10 test-bb
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V{ } 6 test-bb
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5 6 edge
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9 { 6 10 } edges
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V{ } 7 test-bb
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6 { 5 7 } edges
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10 8 edge
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7 2 edge
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[ ] [ test-liveness ] unit-test
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[ t ] [ 1 get R_q 1 11 [a,b] [ get ] map unique = ] unit-test
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[ t ] [ 2 get R_q 2 11 [a,b] [ get ] map unique = ] unit-test
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[ t ] [ 3 get R_q 3 10 [a,b] [ get ] map unique = ] unit-test
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[ t ] [ 4 get R_q 4 7 [a,b] [ get ] map unique = ] unit-test
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[ t ] [ 5 get R_q 5 7 [a,b] [ get ] map unique = ] unit-test
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[ t ] [ 6 get R_q 6 7 [a,b] [ get ] map unique = ] unit-test
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[ t ] [ 7 get R_q 7 7 [a,b] [ get ] map unique = ] unit-test
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[ t ] [ 8 get R_q 6 10 [a,b] [ get ] map unique = ] unit-test
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[ t ] [ 9 get R_q 8 6 10 [a,b] remove [ get ] map unique = ] unit-test
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[ t ] [ 10 get R_q 10 10 [a,b] [ get ] map unique = ] unit-test
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[ t ] [ 11 get R_q 11 11 [a,b] [ get ] map unique = ] unit-test
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[ t ] [ 1 get T_q 1 get 1array unique = ] unit-test
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[ t ] [ 2 get T_q 2 get 1array unique = ] unit-test
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[ t ] [ 3 get T_q 3 get 2 get 2array unique = ] unit-test
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[ t ] [ 4 get T_q 4 get 2 get 2array unique = ] unit-test
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[ t ] [ 5 get T_q 5 get 2 get 2array unique = ] unit-test
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[ t ] [ 6 get T_q { 6 2 5 } [ get ] map unique = ] unit-test
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[ t ] [ 7 get T_q { 7 2 } [ get ] map unique = ] unit-test
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[ t ] [ 8 get T_q { 8 2 5 } [ get ] map unique = ] unit-test
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[ t ] [ 9 get T_q { 2 5 8 9 } [ get ] map unique = ] unit-test
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[ t ] [ 10 get T_q { 2 5 8 10 } [ get ] map unique = ] unit-test
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[ t ] [ 11 get T_q 11 get 1array unique = ] unit-test
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[ f ] [ 1 get back-edge-target? ] unit-test
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[ t ] [ 2 get back-edge-target? ] unit-test
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[ f ] [ 3 get back-edge-target? ] unit-test
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[ f ] [ 4 get back-edge-target? ] unit-test
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[ t ] [ 5 get back-edge-target? ] unit-test
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[ f ] [ 6 get back-edge-target? ] unit-test
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[ f ] [ 7 get back-edge-target? ] unit-test
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[ t ] [ 8 get back-edge-target? ] unit-test
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[ f ] [ 9 get back-edge-target? ] unit-test
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[ f ] [ 10 get back-edge-target? ] unit-test
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[ f ] [ 11 get back-edge-target? ] unit-test
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[ f ] [ 0 1 get live-in? ] unit-test
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[ f ] [ 1 1 get live-in? ] unit-test
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[ f ] [ 2 1 get live-in? ] unit-test
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[ f ] [ 0 1 get live-out? ] unit-test
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[ f ] [ 1 1 get live-out? ] unit-test
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[ f ] [ 2 1 get live-out? ] unit-test
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[ f ] [ 0 2 get live-in? ] unit-test
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[ f ] [ 1 2 get live-in? ] unit-test
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[ f ] [ 2 2 get live-in? ] unit-test
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[ f ] [ 0 2 get live-out? ] unit-test
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[ f ] [ 1 2 get live-out? ] unit-test
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[ f ] [ 2 2 get live-out? ] unit-test
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[ f ] [ 0 3 get live-in? ] unit-test
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[ f ] [ 1 3 get live-in? ] unit-test
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[ f ] [ 2 3 get live-in? ] unit-test
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[ t ] [ 0 3 get live-out? ] unit-test
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[ t ] [ 1 3 get live-out? ] unit-test
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[ t ] [ 2 3 get live-out? ] unit-test
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[ t ] [ 0 4 get live-in? ] unit-test
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[ f ] [ 1 4 get live-in? ] unit-test
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[ t ] [ 2 4 get live-in? ] unit-test
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[ f ] [ 0 4 get live-out? ] unit-test
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[ f ] [ 1 4 get live-out? ] unit-test
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[ t ] [ 2 4 get live-out? ] unit-test
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[ f ] [ 0 5 get live-in? ] unit-test
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[ f ] [ 1 5 get live-in? ] unit-test
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[ t ] [ 2 5 get live-in? ] unit-test
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[ f ] [ 0 5 get live-out? ] unit-test
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[ f ] [ 1 5 get live-out? ] unit-test
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[ t ] [ 2 5 get live-out? ] unit-test
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[ f ] [ 0 6 get live-in? ] unit-test
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[ f ] [ 1 6 get live-in? ] unit-test
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[ t ] [ 2 6 get live-in? ] unit-test
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[ f ] [ 0 6 get live-out? ] unit-test
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[ f ] [ 1 6 get live-out? ] unit-test
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[ t ] [ 2 6 get live-out? ] unit-test
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[ f ] [ 0 7 get live-in? ] unit-test
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[ f ] [ 1 7 get live-in? ] unit-test
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[ f ] [ 2 7 get live-in? ] unit-test
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[ f ] [ 0 7 get live-out? ] unit-test
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[ f ] [ 1 7 get live-out? ] unit-test
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[ f ] [ 2 7 get live-out? ] unit-test
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[ f ] [ 0 8 get live-in? ] unit-test
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[ t ] [ 1 8 get live-in? ] unit-test
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[ t ] [ 2 8 get live-in? ] unit-test
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[ f ] [ 0 8 get live-out? ] unit-test
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[ t ] [ 1 8 get live-out? ] unit-test
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[ t ] [ 2 8 get live-out? ] unit-test
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[ f ] [ 0 9 get live-in? ] unit-test
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[ t ] [ 1 9 get live-in? ] unit-test
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[ t ] [ 2 9 get live-in? ] unit-test
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[ f ] [ 0 9 get live-out? ] unit-test
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[ t ] [ 1 9 get live-out? ] unit-test
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[ t ] [ 2 9 get live-out? ] unit-test
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[ f ] [ 0 10 get live-in? ] unit-test
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[ t ] [ 1 10 get live-in? ] unit-test
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[ t ] [ 2 10 get live-in? ] unit-test
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[ f ] [ 0 10 get live-out? ] unit-test
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[ t ] [ 1 10 get live-out? ] unit-test
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[ t ] [ 2 10 get live-out? ] unit-test
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[ f ] [ 0 11 get live-in? ] unit-test
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[ f ] [ 1 11 get live-in? ] unit-test
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[ f ] [ 2 11 get live-in? ] unit-test
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[ f ] [ 0 11 get live-out? ] unit-test
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[ f ] [ 1 11 get live-out? ] unit-test
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[ f ] [ 2 11 get live-out? ] unit-test
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@ -1,130 +0,0 @@
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! Copyright (C) 2009 Daniel Ehrenberg
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! See http://factorcode.org/license.txt for BSD license.
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USING: kernel sequences assocs accessors
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namespaces fry math sets combinators locals
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compiler.cfg.rpo
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compiler.cfg.dominance
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compiler.cfg.def-use
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compiler.cfg.instructions ;
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FROM: namespaces => set ;
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IN: compiler.cfg.ssa.liveness
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! Liveness checking on SSA IR, as described in
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! "Fast Liveness Checking for SSA-Form Programs", Sebastian Hack et al.
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! http://hal.archives-ouvertes.fr/docs/00/19/22/19/PDF/fast_liveness.pdf
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<PRIVATE
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! The sets T_q and R_q are described there
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SYMBOL: T_q-sets
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SYMBOL: R_q-sets
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! Targets of back edges
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SYMBOL: back-edge-targets
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: T_q ( q -- T_q )
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T_q-sets get at ;
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: R_q ( q -- R_q )
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R_q-sets get at ;
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: back-edge-target? ( block -- ? )
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back-edge-targets get key? ;
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: next-R_q ( q -- R_q )
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[ ] [ successors>> ] [ number>> ] tri
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'[ number>> _ >= ] filter
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[ R_q ] map assoc-combine
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[ conjoin ] keep ;
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: set-R_q ( q -- )
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[ next-R_q ] keep R_q-sets get set-at ;
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: set-back-edges ( q -- )
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[ successors>> ] [ number>> ] bi '[
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dup number>> _ <
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[ back-edge-targets get conjoin ] [ drop ] if
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] each ;
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: init-R_q ( -- )
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H{ } clone R_q-sets set
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H{ } clone back-edge-targets set ;
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: compute-R_q ( cfg -- )
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init-R_q
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post-order [
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[ set-R_q ] [ set-back-edges ] bi
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] each ;
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! This algorithm for computing T_q uses equation (1)
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! but not the faster algorithm described in the paper
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: back-edges-from ( q -- edges )
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R_q keys [
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[ successors>> ] [ number>> ] bi
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'[ number>> _ < ] filter
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] gather ;
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: T^_q ( q -- T^_q )
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[ back-edges-from ] [ R_q ] bi
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'[ _ key? not ] filter ;
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: next-T_q ( q -- T_q )
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dup dup T^_q [ next-T_q keys ] map
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concat unique [ conjoin ] keep
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[ swap T_q-sets get set-at ] keep ;
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: compute-T_q ( cfg -- )
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H{ } T_q-sets set
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[ next-T_q drop ] each-basic-block ;
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PRIVATE>
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: precompute-liveness ( cfg -- )
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[ compute-R_q ] [ compute-T_q ] bi ;
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<PRIVATE
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! This doesn't take advantage of ordering T_q,a so you
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! only have to check one if the CFG is reducible.
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! It should be changed to be more efficient.
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: only? ( seq obj -- ? )
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'[ _ eq? ] all? ;
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: strictly-dominates? ( bb1 bb2 -- ? )
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[ dominates? ] [ eq? not ] 2bi and ;
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: T_q,a ( a q -- T_q,a )
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! This could take advantage of the structure of dominance,
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! but probably I'll replace it with the algorithm that works
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! on reducible CFGs anyway
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T_q keys swap def-of
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[ '[ _ swap strictly-dominates? ] filter ] when* ;
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: live? ( vreg node quot -- ? )
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[ [ T_q,a ] [ drop uses-of ] 2bi ] dip
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'[ [ R_q keys _ ] keep @ intersects? ] any? ; inline
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PRIVATE>
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: live-in? ( vreg node -- ? )
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[ drop ] live? ;
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<PRIVATE
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: (live-out?) ( vreg node -- ? )
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dup dup dup '[
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_ = _ back-edge-target? not and
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[ _ swap remove ] when
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] live? ;
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PRIVATE>
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:: live-out? ( vreg node -- ? )
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vreg def-of :> def
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{
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{ [ node def eq? ] [ vreg uses-of def only? not ] }
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{ [ def node strictly-dominates? ] [ vreg node (live-out?) ] }
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[ f ]
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} cond ;
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