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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/amd64
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/amd64')
-rw-r--r--lib/hipe/amd64/hipe_amd64_registers.erl3
1 files changed, 3 insertions, 0 deletions
diff --git a/lib/hipe/amd64/hipe_amd64_registers.erl b/lib/hipe/amd64/hipe_amd64_registers.erl
index ada5311453..7c6965b938 100644
--- a/lib/hipe/amd64/hipe_amd64_registers.erl
+++ b/lib/hipe/amd64/hipe_amd64_registers.erl
@@ -253,6 +253,9 @@ ret(N) ->
_ -> exit({?MODULE, ret, N})
end.
+%% Note: the fact that (allocatable() UNION allocatable_x87() UNION
+%% allocatable_sse2()) is a subset of call_clobbered() is hard-coded in
+%% hipe_x86_defuse:insn_defs_all/1
call_clobbered() ->
[{?RAX,tagged},{?RAX,untagged}, % does the RA strip the type or not?
{?RDX,tagged},{?RDX,untagged},