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author | Magnus Lång <[email protected]> | 2016-05-28 20:22:34 +0200 |
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committer | Magnus Lång <[email protected]> | 2016-09-02 15:04:45 +0200 |
commit | 85bd166647e7f260fd665eb44da9151c0d88f208 (patch) | |
tree | 84878ab624fcc22246bae89b75a6857415508539 /lib/hipe/ppc | |
parent | c2f8b61ca3682281752fa0984699214dfcbf7ccd (diff) | |
download | otp-85bd166647e7f260fd665eb44da9151c0d88f208.tar.gz otp-85bd166647e7f260fd665eb44da9151c0d88f208.tar.bz2 otp-85bd166647e7f260fd665eb44da9151c0d88f208.zip |
hipe: Add hipe_regalloc_prepass
hipe_regalloc_prepass speeds up register allocation by spilling any temp
that is live over a call (which clobbers all register).
In order to detect these, a new function was added to the target
interface; defines_all_alloc/1, that takes an instruction and returns a
boolean.
Diffstat (limited to 'lib/hipe/ppc')
-rw-r--r-- | lib/hipe/ppc/hipe_ppc_defuse.erl | 7 | ||||
-rw-r--r-- | lib/hipe/ppc/hipe_ppc_registers.erl | 2 |
2 files changed, 9 insertions, 0 deletions
diff --git a/lib/hipe/ppc/hipe_ppc_defuse.erl b/lib/hipe/ppc/hipe_ppc_defuse.erl index 77b84dc574..305e88488d 100644 --- a/lib/hipe/ppc/hipe_ppc_defuse.erl +++ b/lib/hipe/ppc/hipe_ppc_defuse.erl @@ -22,6 +22,7 @@ -module(hipe_ppc_defuse). -export([insn_def_all/1, insn_use_all/1]). -export([insn_def_gpr/1, insn_use_gpr/1]). +-export([insn_defs_all_gpr/1, insn_defs_all_fpr/1]). -export([insn_def_fpr/1, insn_use_fpr/1]). -include("hipe_ppc.hrl"). @@ -52,6 +53,9 @@ insn_def_gpr(I) -> _ -> [] end. +insn_defs_all_gpr(#pseudo_call{}) -> true; +insn_defs_all_gpr(_) -> false. + call_clobbered_gpr() -> [hipe_ppc:mk_temp(R, T) || {R,T} <- hipe_ppc_registers:call_clobbered() ++ all_fp_pseudos()]. @@ -116,6 +120,9 @@ insn_def_fpr(I) -> _ -> [] end. +insn_defs_all_fpr(#pseudo_call{}) -> true; +insn_defs_all_fpr(_) -> false. + call_clobbered_fpr() -> [hipe_ppc:mk_temp(R, 'double') || R <- hipe_ppc_registers:allocatable_fpr()]. diff --git a/lib/hipe/ppc/hipe_ppc_registers.erl b/lib/hipe/ppc/hipe_ppc_registers.erl index f4781d5ed7..8f6d9779fc 100644 --- a/lib/hipe/ppc/hipe_ppc_registers.erl +++ b/lib/hipe/ppc/hipe_ppc_registers.erl @@ -201,6 +201,8 @@ is_arg(R) -> _ -> false end. +%% Note: the fact that allocatable_gpr() is a subset of call_clobbered() is +%% hard-coded in hipe_ppc_defuse:insn_defs_all_gpr/1 call_clobbered() -> % does the RA strip the type or not? [{?R0,tagged},{?R0,untagged}, %% R1 is reserved for C |