Use integer division in a certain case.

src/ia32/lithium-codegen-ia32.cc

Index: src/ia32/lithium-codegen-ia32.cc
===================================================================
--- src/ia32/lithium-codegen-ia32.cc	(revision 12214)
+++ src/ia32/lithium-codegen-ia32.cc	(working copy)
@@ -1019,8 +1019,10 @@
   __ idiv(right_reg);
 
   // Deoptimize if remainder is not 0.
-  __ test(edx, Operand(edx));
-  DeoptimizeIf(not_zero, instr->environment());
+  if (!instr->hydrogen()->CheckFlag(HValue::kWillTruncateToInt32)) {
+    __ test(edx, Operand(edx));
+    DeoptimizeIf(not_zero, instr->environment());
+  }
 }