[llvm-testresults] evchen-ppc32 nightly tester results

Evan Cheng evan.cheng at apple.com
Wed May 5 17:26:46 PDT 2010


On May 5, 2010, at 5:17 PM, Dale Johannesen wrote:

> 
> On May 5, 2010, at 3:29 PMPDT, Dale Johannesen wrote:
> 
>> Building stepanov_vector crashes thus:
> 
> SSAUpdater is crashing because of this block, which exists on entry to GVN:
> 
> bb.i.i61.us:                                      ; preds = %bb.i.i61.us
>  %404 = invoke i32 (i8*, ...)* @"\01_printf$LDBL128"(i8* getelementptr inbounds ([21 x i8]* @.str1, i32 0, i32 0), i32 0)
>          to label %bb.i.i61.us unwind label %lpad149 ; <i32> [#uses=0]
> 
> As the immediate dominator is 0 this loop crashes on the 2nd iteration:
> 
> 450 static bool IsDefInDomFrontier(const SSAUpdater::BBInfo *Pred,
> 451                                const SSAUpdater::BBInfo *IDom) {
> 452   for (; Pred != IDom; Pred = Pred->IDom) {
> 453     if (Pred->DefBB == Pred)
> 454       return true;
> 455   }
> 
> What is the expectation here?  Should SSAUpdater handle this, or should it have been removed earlier?
> 

Bob touched SSA updater last. :-)

Evan



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