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-rw-r--r--erts/emulator/beam/ops.tab11
1 files changed, 8 insertions, 3 deletions
diff --git a/erts/emulator/beam/ops.tab b/erts/emulator/beam/ops.tab
index 7a125b0f67..10ca74cd60 100644
--- a/erts/emulator/beam/ops.tab
+++ b/erts/emulator/beam/ops.tab
@@ -1690,9 +1690,14 @@ i_plus S1=c S2=c Fail Dst => move S1 x | i_plus x S2 Fail Dst
i_plus xy xyc j? d
-i_minus x x j? d
-i_minus c x j? d
-i_minus s s j? d
+# A minus instruction with a constant right operand will be
+# converted to an i_increment instruction, except in guards or
+# when the negated value of the constant won't fit in a guard.
+# Therefore, it very rare.
+i_minus S1 S2=c Fail Dst => move S2 x | i_minus S1 x Fail Dst
+
+i_minus xy xy j? d
+i_minus c xy j? d
i_times j? s s d