[turbofan] Also optimize unsigned division by constant.

src/x64/assembler-x64.h

Index: src/x64/assembler-x64.h
diff --git a/src/x64/assembler-x64.h b/src/x64/assembler-x64.h
index d938046b1c91dd7e09919ef9c23363371911d657..3b55396c14877163b50e63cc86a1a70681ca476a 100644
--- a/src/x64/assembler-x64.h
+++ b/src/x64/assembler-x64.h
@@ -810,8 +810,11 @@ class Assembler : public AssemblerBase {
   // Sign-extends eax into edx:eax.
   void cdq();
 
+  // Multiply eax by src, put the result in edx:eax.
+  void mull(Register src);
+  void mull(const Operand& src);
   // Multiply rax by src, put the result in rdx:rax.
-  void mul(Register src);
+  void mulq(Register src);
 
 #define DECLARE_SHIFT_INSTRUCTION(instruction, subcode)                       \
   void instruction##p(Register dst, Immediate imm8) {                         \
@@ -1473,6 +1476,7 @@ class Assembler : public AssemblerBase {
   // Signed multiply instructions.
   // rdx:rax = rax * src when size is 64 or edx:eax = eax * src when size is 32.
   void emit_imul(Register src, int size);
+  void emit_imul(const Operand& src, int size);
   void emit_imul(Register dst, Register src, int size);
   void emit_imul(Register dst, const Operand& src, int size);
   void emit_imul(Register dst, Register src, Immediate imm, int size);