https://git.ruby-lang.org/ruby.git/commit/?id=b0ae4fdcfb

From b0ae4fdcfbe0004908adcc44f0ae0e3a3762917b Mon Sep 17 00:00:00 2001
From: Kevin Deisz <kevin.deisz@g...>
Date: Tue, 6 Jul 2021 14:45:36 -0400
Subject: Implement opt_mult

Basically the same thing as opt_mod, but for multiplying.
---
 bootstraptest/test_yjit.rb | 10 ++++++++++
 yjit_codegen.c             | 10 +++++++++-
 2 files changed, 19 insertions(+), 1 deletion(-)

diff --git a/bootstraptest/test_yjit.rb b/bootstraptest/test_yjit.rb
index 4bf9bc4262..14b901fbf1 100644
--- a/bootstraptest/test_yjit.rb
+++ b/bootstraptest/test_yjit.rb
@@ -26,6 +26,16 @@ assert_equal '2', %q{ https://github.com/ruby/ruby/blob/trunk/bootstraptest/test_yjit.rb#L26
   mod(7, 5)
 }
 
+# Test for opt_mult
+assert_equal '12', %q{
+  def mult(a, b)
+    a * b
+  end
+
+  mult(6, 2)
+  mult(6, 2)
+}
+
 # BOP redefined methods work when JIT compiled
 assert_equal 'false', %q{
   def less_than x
diff --git a/yjit_codegen.c b/yjit_codegen.c
index 0c1b0da7a4..ab838a233a 100644
--- a/yjit_codegen.c
+++ b/yjit_codegen.c
@@ -1794,7 +1794,7 @@ gen_opt_aset(jitstate_t *jit, ctx_t *ctx) https://github.com/ruby/ruby/blob/trunk/yjit_codegen.c#L1794
     x86opnd_t arg1 = ctx_stack_pop(ctx, 1);
     x86opnd_t arg0 = ctx_stack_pop(ctx, 1);
 
-    // Call rb_vm_opt_mod(VALUE recv, VALUE obj)
+    // Call rb_vm_opt_aset(VALUE recv, VALUE obj)
     yjit_save_regs(cb);
     mov(cb, C_ARG_REGS[0], arg0);
     mov(cb, C_ARG_REGS[1], arg1);
@@ -1933,6 +1933,13 @@ gen_opt_plus(jitstate_t* jit, ctx_t* ctx) https://github.com/ruby/ruby/blob/trunk/yjit_codegen.c#L1933
     return YJIT_KEEP_COMPILING;
 }
 
+static codegen_status_t
+gen_opt_mult(jitstate_t* jit, ctx_t* ctx)
+{
+    // Delegate to send, call the method on the recv
+    return gen_opt_send_without_block(jit, ctx);
+}
+
 VALUE rb_vm_opt_mod(VALUE recv, VALUE obj);
 
 static codegen_status_t
@@ -3462,6 +3469,7 @@ yjit_init_codegen(void) https://github.com/ruby/ruby/blob/trunk/yjit_codegen.c#L3469
     yjit_reg_op(BIN(opt_or), gen_opt_or);
     yjit_reg_op(BIN(opt_minus), gen_opt_minus);
     yjit_reg_op(BIN(opt_plus), gen_opt_plus);
+    yjit_reg_op(BIN(opt_mult), gen_opt_mult);
     yjit_reg_op(BIN(opt_mod), gen_opt_mod);
     yjit_reg_op(BIN(opt_ltlt), gen_opt_ltlt);
     yjit_reg_op(BIN(opt_nil_p), gen_opt_nil_p);
-- 
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