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authorSverker Eriksson <[email protected]>2015-04-21 15:33:32 +0200
committerSverker Eriksson <[email protected]>2015-04-21 15:41:56 +0200
commite40aab7e9fb9d622e9879efa43af2ce30b287450 (patch)
tree3a5c69da567670d3baaed8265875f2a6d1029cc8 /lib/hipe/rtl/hipe_rtl_binary_match.erl
parent91fb6636f95f882b75170fb77c412ccc4a9b75f4 (diff)
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erts,hipe: Optimize away calls to emasculate_binary
Only call emasculate_binary if ProcBin.flags is set, which means it's a writable binary.
Diffstat (limited to 'lib/hipe/rtl/hipe_rtl_binary_match.erl')
-rw-r--r--lib/hipe/rtl/hipe_rtl_binary_match.erl10
1 files changed, 9 insertions, 1 deletions
diff --git a/lib/hipe/rtl/hipe_rtl_binary_match.erl b/lib/hipe/rtl/hipe_rtl_binary_match.erl
index c906286cb4..a36a024980 100644
--- a/lib/hipe/rtl/hipe_rtl_binary_match.erl
+++ b/lib/hipe/rtl/hipe_rtl_binary_match.erl
@@ -697,14 +697,22 @@ get_binary_bytes(Binary, BinSize, Base, Offset, Orig,
%%%%%%%%%%%%%%%%%%%%%%%%% UTILS %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
get_base(Orig,Base) ->
- [HeapLbl,REFCLbl,EndLbl] = create_lbls(3),
+ [HeapLbl,REFCLbl,WritableLbl,NotWritableLbl,EndLbl] = create_lbls(5),
+ Flags = hipe_rtl:mk_new_reg_gcsafe(),
+
[hipe_tagscheme:test_heap_binary(Orig, hipe_rtl:label_name(HeapLbl),
hipe_rtl:label_name(REFCLbl)),
HeapLbl,
hipe_rtl:mk_alu(Base, Orig, 'add', hipe_rtl:mk_imm(?HEAP_BIN_DATA-2)),
hipe_rtl:mk_goto(hipe_rtl:label_name(EndLbl)),
REFCLbl,
+ get_field_from_term({proc_bin, flags}, Orig, Flags),
+ hipe_rtl:mk_branch(Flags, 'ne', hipe_rtl:mk_imm(0),
+ hipe_rtl:label_name(WritableLbl),
+ hipe_rtl:label_name(NotWritableLbl)),
+ WritableLbl,
hipe_rtl:mk_call([], emasculate_binary, [Orig], [], [], 'not_remote'),
+ NotWritableLbl,
hipe_rtl:mk_load(Base, Orig, hipe_rtl:mk_imm(?PROC_BIN_BYTES-2)),
EndLbl].