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-rw-r--r--lib/compiler/src/beam_ssa_pre_codegen.erl8
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/compiler/src/beam_ssa_pre_codegen.erl b/lib/compiler/src/beam_ssa_pre_codegen.erl
index b940c0fdc2..fa1b7bb71e 100644
--- a/lib/compiler/src/beam_ssa_pre_codegen.erl
+++ b/lib/compiler/src/beam_ssa_pre_codegen.erl
@@ -2008,6 +2008,14 @@ reserve_zreg([#b_set{op={bif,tuple_size},dst=Dst},
reserve_zreg([#b_set{op={bif,tuple_size},dst=Dst}],
#b_switch{}, ShortLived, A) ->
reserve_zreg_1(Dst, ShortLived, A);
+reserve_zreg([#b_set{op={bif,'xor'}}], _Last, _ShortLived, A) ->
+ %% There is no short, easy way to rewrite 'xor' to a series of
+ %% test instructions.
+ A;
+reserve_zreg([#b_set{op={bif,is_record}}], _Last, _ShortLived, A) ->
+ %% There is no short, easy way to rewrite is_record/2 to a series of
+ %% test instructions.
+ A;
reserve_zreg([#b_set{op=Op,dst=Dst}|Is], Last, ShortLived, A0) ->
IsZReg = case Op of
bs_match_string -> true;