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8068945: Use RBP register as proper frame pointer in JIT compiled code on x86

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Introduce the PreserveFramePointer flag to control if RBP is used as the frame pointer or as a general purpose register.

Reviewed-by: kvn, roland, dlong, enevill, shade
This commit is contained in:
Zoltan Majo 2015-04-27 10:49:43 +02:00
parent dc67bb0a0e
commit a452b030ce
28 changed files with 519 additions and 418 deletions
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6
hotspot/src/cpu/x86/vm/assembler_x86.hpp
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@ -142,8 +142,10 @@ REGISTER_DECLARATION(Register, r15_thread, r15); // callee-saved
#endif // _LP64
// JSR 292 fixed register usages:
REGISTER_DECLARATION(Register, rbp_mh_SP_save, rbp);
// JSR 292
// On x86, the SP does not have to be saved when invoking method handle intrinsics
// or compiled lambda forms. We indicate that by setting rbp_mh_SP_save to noreg.
REGISTER_DECLARATION(Register, rbp_mh_SP_save, noreg);
// Address is an abstraction used to represent a memory location
// using any of the amd64 addressing modes with one object.