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6760773: UseCompressedOops is broken with UseParNewGC

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Sparc code for gen_subtype_check was doing an ld for a compressed oop with the sign bit set so not comparing, leading to a ClassCastException.

Reviewed-by: phh, never, acorn, kvn, xlu
This commit is contained in:
Coleen Phillimore 2008-11-07 11:03:32 -05:00
parent 8eb2e02296
commit 0cecb67ae7
2 changed files with 3 additions and 3 deletions
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4
hotspot/src/cpu/sparc/vm/stubGenerator_sparc.cpp
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@ -956,7 +956,7 @@ class StubGenerator: public StubCodeGenerator {
// Load a little early; will load 1 off the end of the array.
// Ok for now; revisit if we have other uses of this routine.
if (UseCompressedOops) {
__ ld(L1_ary_ptr,0,L2_super);// Will load a little early
__ lduw(L1_ary_ptr,0,L2_super);// Will load a little early
} else {
__ ld_ptr(L1_ary_ptr,0,L2_super);// Will load a little early
}
@ -973,7 +973,7 @@ class StubGenerator: public StubCodeGenerator {
#ifdef _LP64
__ subcc(L2_super,L4_ooptmp,Rret); // Check for match; zero in Rret for a hit
__ br( Assembler::notEqual, false, Assembler::pt, loop );
__ delayed()->ld(L1_ary_ptr,0,L2_super);// Will load a little early
__ delayed()->lduw(L1_ary_ptr,0,L2_super);// Will load a little early
#else
ShouldNotReachHere();
#endif