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| author | Magnus Lång <[email protected]> | 2016-09-01 17:21:25 +0200 |
|---|---|---|
| committer | Magnus Lång <[email protected]> | 2016-09-05 19:16:26 +0200 |
| commit | 1039c0196a7e643c63ce71b2c6daa2b78b3aa832 (patch) | |
| tree | 7540338826d46f9850278b3af8ad84e2f4c76119 /lib/hipe/arm/hipe_arm_ra_naive.erl | |
| parent | b4695b8088b8fc6f3844e33246849ed8bb8b18cf (diff) | |
| download | otp-1039c0196a7e643c63ce71b2c6daa2b78b3aa832.tar.gz otp-1039c0196a7e643c63ce71b2c6daa2b78b3aa832.tar.bz2 otp-1039c0196a7e643c63ce71b2c6daa2b78b3aa832.zip | |
hipe: Reuse liveness between regalloc iterations
This is sound because the liveness data structure only stores liveness
info at basic block boundaries, and the rewrites that happen in
TargetSpecific:check_and_rewrite/2 preserves all existing definitions
and uses, and all new liveness intervals, belonging to newly introduced
temporaries, are always local to a basic block, and thus do not show up
in the liveout or livein sets for the basic block.
Diffstat (limited to 'lib/hipe/arm/hipe_arm_ra_naive.erl')
| -rw-r--r-- | lib/hipe/arm/hipe_arm_ra_naive.erl | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/lib/hipe/arm/hipe_arm_ra_naive.erl b/lib/hipe/arm/hipe_arm_ra_naive.erl index 0ea4b04092..395beff292 100644 --- a/lib/hipe/arm/hipe_arm_ra_naive.erl +++ b/lib/hipe/arm/hipe_arm_ra_naive.erl @@ -20,11 +20,11 @@ %% -module(hipe_arm_ra_naive). --export([ra/3]). +-export([ra/4]). -include("hipe_arm.hrl"). -ra(CFG, _Coloring_fp, _Options) -> % -> {CFG, Coloring} +ra(CFG, Liveness, _Coloring_fp, _Options) -> % -> {CFG, Liveness, Coloring} {NewCFG,_DidSpill} = hipe_arm_ra_postconditions:check_and_rewrite2(CFG, [], 'naive'), - {NewCFG, []}. + {NewCFG, Liveness, []}. |