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authorMagnus Lång <[email protected]>2016-05-28 20:22:34 +0200
committerMagnus Lång <[email protected]>2016-09-02 15:04:45 +0200
commit85bd166647e7f260fd665eb44da9151c0d88f208 (patch)
tree84878ab624fcc22246bae89b75a6857415508539 /lib/hipe/ppc/hipe_ppc_registers.erl
parentc2f8b61ca3682281752fa0984699214dfcbf7ccd (diff)
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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/hipe_ppc_registers.erl')
-rw-r--r--lib/hipe/ppc/hipe_ppc_registers.erl2
1 files changed, 2 insertions, 0 deletions
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