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| author | Cliff Click <cliffc@acm.org> | 2025-04-03 11:31:06 -0700 |
|---|---|---|
| committer | Cliff Click <cliffc@acm.org> | 2025-04-03 11:31:06 -0700 |
| commit | cc32b0cf801620f1d289cb6ae183e079111540fc (patch) | |
| tree | 0cc40b8233cefc22370b0b845ca604344716b0be /chapter21/src | |
| parent | 37b46799c03244241d589085e24582bef8a59efb (diff) | |
| download | Simple-cc32b0cf801620f1d289cb6ae183e079111540fc.tar.gz Simple-cc32b0cf801620f1d289cb6ae183e079111540fc.zip | |
Fix RA parallel phi assign
Force spills when phi uses phi same loop header.
This is effectively a parallel assignment, generally shifting values from one iteration to the next.
Diffstat (limited to 'chapter21/src')
| -rw-r--r-- | chapter21/src/main/java/com/seaofnodes/simple/codegen/RegAlloc.java | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/chapter21/src/main/java/com/seaofnodes/simple/codegen/RegAlloc.java b/chapter21/src/main/java/com/seaofnodes/simple/codegen/RegAlloc.java index 56b5aa52..9042de3b 100644 --- a/chapter21/src/main/java/com/seaofnodes/simple/codegen/RegAlloc.java +++ b/chapter21/src/main/java/com/seaofnodes/simple/codegen/RegAlloc.java @@ -410,7 +410,7 @@ public class RegAlloc { // splitting in inner loop or at loop border (min==max || phi.region().cfg(i).loopDepth() <= min) && // and not around the backedge of a loop (bad place to force a split, hard to remove) - !(phi.region() instanceof LoopNode && i==2) ) + !(phi.region() instanceof LoopNode && i==2 && (phi.in(i) instanceof PhiNode pp && pp.region()==phi.region())) ) // Split before phi-use in prior block insertBefore(phi,i, "use/loop/phi",round,lrg); |