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bjorng · Jul 19, 2023 · 56226c9 · 56226c9
1 parent 3065f69
commit 56226c9
Showing 1 changed file with 5 additions and 1 deletion.
diff --git a/erts/emulator/beam/jit/arm/instr_arith.cpp b/erts/emulator/beam/jit/arm/instr_arith.cpp
@@ -528,6 +528,11 @@ void BeamModuleAssembler::emit_i_mul_add(const ArgLabel &Fail,
                                          const ArgRegister &Dst) {
     bool is_product_small = is_product_small_if_args_are_small(Src1, Src2);
     bool is_sum_small = is_sum_small_if_args_are_small(Src3, Src4);
+    bool is_increment_zero = Src4.isSmall() && Src4.as<ArgSmall>().getSigned() == 0;
+
+    if (is_increment_zero) {
+        comment("(adding zero)");
+    }
 
     if (always_small(Src1) && always_small(Src2) && always_small(Src4) &&
         is_product_small && is_sum_small) {
@@ -560,7 +565,6 @@ void BeamModuleAssembler::emit_i_mul_add(const ArgLabel &Fail,
         Label small = a.newLabel();
         Label store_result = a.newLabel();
         auto [src1, src2] = load_sources(Src1, ARG2, Src2, ARG3);
-        bool is_increment_zero = Src4.isSmall() && Src4.as<ArgSmall>().getSigned() == 0;
         bool is_increment_arm_literal = Src4.isSmall() &&
             Support::isUInt12(Src4.as<ArgSmall>().get());
         auto src4 = load_source(ArgXRegister(0), XREG0);