RFR: C2 should use heapword-sized object math

[Roman Kennke]

Ok

Am 30. November 2017 11:13:55 MEZ schrieb Aleksey Shipilev <shade at redhat.com>:
>I'm playing with 32-bit builds. This one fixes one of the compiler
>bugs:
>
>diff -r 46091fe1a0bc src/hotspot/share/opto/macro.cpp
>--- a/src/hotspot/share/opto/macro.cpp	Mon Nov 27 18:42:57 2017 +0100
>+++ b/src/hotspot/share/opto/macro.cpp	Thu Nov 30 11:12:52 2017 +0100
>@@ -1449,7 +1449,7 @@
>     Node* init_size_in_bytes = size_in_bytes;
>     if (UseShenandoahGC) {
>      // Allocate several words more for the Shenandoah brooks pointer.
>-      size_in_bytes = new AddLNode(size_in_bytes,
>_igvn.MakeConX(BrooksPointer::byte_size()));
>+      size_in_bytes = new AddXNode(size_in_bytes,
>_igvn.MakeConX(BrooksPointer::byte_size()));
>       transform_later(size_in_bytes);
>     }
>
>Testing: hotspot_gc_shenandoah (fastdebug, Linux x86_64)
>
>Thanks,
>-Aleksey

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