Reland "Handle non-power-of-2 divisors in division-like operations".

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 b1b50c047b8a45ed153aa067ea0212a1325f8ca5..4214249efcf7ed33033a8b0e051ea8e3885f651c 100644
--- a/src/x64/assembler-x64.h
+++ b/src/x64/assembler-x64.h
@@ -937,6 +937,7 @@ class Assembler : public AssemblerBase {
   void imul(Register dst, const Operand& src);           // dst = dst * src.
   void imul(Register dst, Register src, Immediate imm);  // dst = src * imm.
   // Signed 32-bit multiply instructions.
+  void imull(Register src);                              // edx:eax = eax * src.
   void imull(Register dst, Register src);                 // dst = dst * src.
   void imull(Register dst, const Operand& src);           // dst = dst * src.
   void imull(Register dst, Register src, Immediate imm);  // dst = src * imm.