[turbofan] Change TruncateFloat32ToInt64 to TryTruncateFloat32ToInt64.

src/compiler/arm64/code-generator-arm64.cc

Index: src/compiler/arm64/code-generator-arm64.cc
diff --git a/src/compiler/arm64/code-generator-arm64.cc b/src/compiler/arm64/code-generator-arm64.cc
index 43907951896b6d640c1d041a16320d026dc01890..7be9d72aca6a2723a71f6f598741b21addde4cc1 100644
--- a/src/compiler/arm64/code-generator-arm64.cc
+++ b/src/compiler/arm64/code-generator-arm64.cc
@@ -1037,6 +1037,12 @@ void CodeGenerator::AssembleArchInstruction(Instruction* instr) {
       break;
     case kArm64Float32ToInt64:
       __ Fcvtzs(i.OutputRegister64(), i.InputFloat32Register(0));
+      if (i.OutputCount() > 1) {
+        __ Cmp(i.OutputRegister(0), 1);
+        __ Ccmp(i.OutputRegister(0), -1, VFlag, vc);
+        __ Fccmp(i.InputDoubleRegister(0), i.InputDoubleRegister(0), VFlag, vc);

[jbramley, 2015/12/08 13:53:08]

InputFloat32Register, surely.

[ahaas, 2015/12/09 11:15:01]

Done.

+        __ Cset(i.OutputRegister(1), vc);
+      }
       break;
     case kArm64Float64ToInt64:
       __ Fcvtzs(i.OutputRegister(0), i.InputDoubleRegister(0));