Bug ID: JDK-6986046 C1 valuestack cleanup

JDK-6986046 : C1 valuestack cleanup

Type: Bug
Component: hotspot
Sub-Component: compiler
Affected Version: hs16,hs19,6,6u21

Priority: P4
Status: Closed
Resolution: Fixed
OS: generic,windows_xp
CPU: generic,x86

Submitted: 2010-09-20
Updated: 2023-09-21
Resolved: 2011-04-23

Versions (Unresolved/Resolved/Fixed)

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Resolved: Release in which this issue/RFE has been resolved.
Fixed : Release in which this issue/RFE has been fixed. The release containing this fix may be available for download as an Early Access Release or a General Availability Release.

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JDK 6	JDK 7	Other
6u25Fixed	7Fixed	hs20Fixed

Related Reports

Duplicate :	JDK-6879934 - CTW failure jdk6_18/hotspot/src/share/vm/compiler/methodLiveness.cpp:477
Duplicate :	JDK-6712105 - Hotspot-Compiler compiles code -> the vm crashes
Relates :	JDK-6987763 - assert(kind() == EmptyExceptionState) failed: only EmptyExceptionStates can be modified
Relates :	JDK-6988303 - 6986046 breaks build with recent gcc
Relates :	JDK-7033577 - Changes for CR6986046 introduce a regression on specjvm98
Relates :	JDK-7114106 - C1: assert(goto_state->is_same(sux_state)) failed: states must match now
Relates :	JDK-8316422 - TestIntegerUnsignedDivMod.java triggers "invalid layout" assert in FrameValues::validate

Description

Christian Wimmer contributed code to cleanup the handling of ValueStacks in c1:

- it fixes an historical oddity in C1 with inlining where all of the expression stacks are kept in the topmost ValueStack instead of being in their respective ValueStacks

- it trims the locals more aggressively in the exception states

- it fixes some mismatches between the bci in an instruction and the method in the ValueStack

Comments

EVALUATION http://hg.openjdk.java.net/jdk7/hotspot-gc/hotspot/rev/f02a8bbe6ed4

09-10-2010

EVALUATION http://hg.openjdk.java.net/jdk7/hotspot-comp/hotspot/rev/f02a8bbe6ed4

24-09-2010

EVALUATION see description

20-09-2010