Align function starts to target-specific bundle alignment.

src/IceTargetLowering.h

Index: src/IceTargetLowering.h
diff --git a/src/IceTargetLowering.h b/src/IceTargetLowering.h
index 6bf142487eb520aaee58570acef2341a84fbf0ed..c3e468da192acc09cc8469d3405bf6c35d8d07bd 100644
--- a/src/IceTargetLowering.h
+++ b/src/IceTargetLowering.h
@@ -137,6 +137,7 @@ public:
   virtual bool hasFramePointer() const { return false; }
   virtual SizeT getFrameOrStackReg() const = 0;
   virtual size_t typeWidthInBytesOnStack(Type Ty) const = 0;
+  virtual SizeT getBundleP2Align() const = 0;

[Jim Stichnoth, 2014/08/28 20:26:12]

Rename this something like getBundleP2AlignLog2Bytes()?

[jvoung (off chromium), 2014/08/28 21:02:22]

Renamed to getBundleAlignLog2Bytes() -- P2 was meant to be power of 2, which is
redundant with Log2?

[Jim Stichnoth, 2014/08/28 21:22:21]

Ah, I didn't realize what the p2 stood for. :)  In that case, feel free to use
your original naming.

[jvoung (off chromium), 2014/08/28 22:38:13]

Well, Log2 is probably more obvious =)

   bool hasComputedFrame() const { return HasComputedFrame; }
   bool shouldDoNopInsertion() const;
   int32_t getStackAdjustment() const { return StackAdjustment; }