[LLVMdev] Branch-like intrinsic
isanbard at gmail.com
Mon Apr 14 15:02:29 PDT 2008
On Mon, Apr 14, 2008 at 2:50 PM, Edward Lee <eslee3 at uiuc.edu> wrote:
> On Mon, Apr 14, 2008 at 5:37 PM, Chris Lattner <sabre at nondot.org> wrote:
> > The code generator does CFG simplification to handle cases where blocks
> > become dead during lowering.
> Oh... is there a way to prevent that from happening? While %x is
> always 1 and %T is always taken, %F isn't actually dead. There would
> be a way (with another intrinsic) for control to flow into %F at the
> point of..
> br i1 %x, label %T, label %F
> That's why I wanted the rest of the compiler to still know about the
> potential flow into %F.
Then that flow would be explicit in the CFG, right? Then %F wouldn't
be dead, I'm assuming.
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