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6985015: C1 needs to support compressed oops

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This change implements compressed oops for C1 for x64 and sparc. The changes are mostly on the codegen level, with a few exceptions when we do access things outside of the heap that are uncompressed from the IR. Compressed oops are now also enabled with tiered.

Reviewed-by: twisti, kvn, never, phh
This commit is contained in:
Igor Veresov 2010-11-30 23:23:40 -08:00
parent 8006fe8f75
commit d59d7ffc4a
30 changed files with 493 additions and 429 deletions
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4
hotspot/src/cpu/sparc/vm/assembler_sparc.cpp
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@ -909,10 +909,10 @@ void MacroAssembler::verify_thread() {
#if defined(COMPILER2) && !defined(_LP64)
// Save & restore possible 64-bit Long arguments in G-regs
sllx(L0,32,G2); // Move old high G1 bits high in G2
sllx(G1, 0,G1); // Clear current high G1 bits
srl(G1, 0,G1); // Clear current high G1 bits
or3 (G1,G2,G1); // Recover 64-bit G1
sllx(L6,32,G2); // Move old high G4 bits high in G2
sllx(G4, 0,G4); // Clear current high G4 bits
srl(G4, 0,G4); // Clear current high G4 bits
or3 (G4,G2,G4); // Recover 64-bit G4
#endif
restore(O0, 0, G2_thread);