Request for reviews (M): 7160161: Missed safepoint in non-Counted loop

[Christian Thalinger]

Looks good.  -- Chris

On Aug 28, 2012, at 5:35 PM, Vladimir Kozlov <vladimir.kozlov at oracle.com> wrote:

> http://cr.openjdk.java.net/~kvn/7160161/webrev
> 
> 7160161: Missed safepoint in non-Counted loop
> 
> Loop peeling optimization removes needed safepoints from peeled iteration of inner non-counted loop during OSR compilation. As result the path without safepoints is created in outer loop.
> 
> Do not remove safepoints during peeling optimization. Improve the code in IdealLoopTree::counted_loop() to eliminate all others safepoints in a loop (but not in this loop's nested loops) which have a safepoint on dominating path.
> 
> Tested with provided test case, CTW, jtreg Compiler. Did analysis of code generated for nested loops which are not counted.
> 
> Thanks,
> Vladimir