1. 14 Apr, 2018 1 commit
    • Jakob Kummerow's avatar
      [ubsan] Change Address typedef to uintptr_t · 2459046c
      Jakob Kummerow authored
      The "Address" type is V8's general-purpose type for manipulating memory
      addresses. Per the C++ spec, pointer arithmetic and pointer comparisons
      are undefined behavior except within the same array; since we generally
      don't operate within a C++ array, our general-purpose type shouldn't be
      a pointer type.
      
      Bug: v8:3770
      Cq-Include-Trybots: luci.chromium.try:linux_chromium_rel_ng;master.tryserver.blink:linux_trusty_blink_rel
      Change-Id: Ib96016c24a0f18bcdba916dabd83e3f24a1b5779
      Reviewed-on: https://chromium-review.googlesource.com/988657
      Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
      Reviewed-by: 's avatarLeszek Swirski <leszeks@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#52601}
      2459046c
  2. 13 Apr, 2018 2 commits
    • jgruber's avatar
      [stubs] Convert DoubleToIStub and MathPowStub to builtins · a3b60675
      jgruber authored
      This is mostly a simple copy & paste of the stub implementation from
      code-stubs-arch.cc to builtins-arch.cc.
      
      The conversion allows removal of a special case for the DoubleToIStub
      within the compiler & wasm pipelines, and also makes the following
      builtins isolate-independent (in conjunction with
      https://crrev.com/c/1006581):
      
      TFC BitwiseAnd
      TFC BitwiseOr
      TFC BitwiseXor
      TFC Exponentiate
      TFC ShiftLeft
      TFC ShiftRight
      TFC ShiftRightLogical
      TFJ AtomicsAdd
      TFJ AtomicsAnd
      TFJ AtomicsCompareExchange
      TFJ AtomicsExchange
      TFJ AtomicsLoad
      TFJ AtomicsOr
      TFJ AtomicsStore
      TFJ AtomicsSub
      TFJ AtomicsXor
      TFJ MathClz32
      TFJ MathImul
      TFJ MathPow
      TFJ NumberParseInt
      TFJ StringFromCharCode
      TFJ TypedArrayFrom
      TFJ TypedArrayOf
      TFJ TypedArrayPrototypeMap
      
      Drive-by: dead code removal & TODOs in code-stubs.h.
      
      Bug: v8:6666
      Change-Id: I763cba2242bcadc2d130b0aaa16a9787212b466a
      Reviewed-on: https://chromium-review.googlesource.com/1012024
      Commit-Queue: Jakob Gruber <jgruber@chromium.org>
      Reviewed-by: 's avatarMichael Starzinger <mstarzinger@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#52591}
      a3b60675
    • jgruber's avatar
      [stubs] Remove return register argument from DoubleToIStub · 87557649
      jgruber authored
      This changes DoubleToIStub to return its result on the stack instead
      of a specific return register.
      
      In a follow-up, the DoubleToIStub could be converted into a builtin.
      
      Bug: v8:6666
      Change-Id: I7852e1586c8f7b56bc5d2545a7bf6238dd2ad650
      Reviewed-on: https://chromium-review.googlesource.com/1009702
      Commit-Queue: Jakob Gruber <jgruber@chromium.org>
      Reviewed-by: 's avatarJaroslav Sevcik <jarin@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#52587}
      87557649
  3. 09 Apr, 2018 1 commit
  4. 06 Apr, 2018 2 commits
    • Michael Achenbach's avatar
      Revert "[cleanup] Refactor the Factory" · 503e07c3
      Michael Achenbach authored
      This reverts commit f9a2e24b.
      
      Reason for revert: gc stress failures not all fixed by follow up.
      
      Original change's description:
      > [cleanup] Refactor the Factory
      > 
      > There is no good reason to have the meat of most objects' initialization
      > logic in heap.cc, all wrapped by the CALL_HEAP_FUNCTION macro. Instead,
      > this CL changes the protocol between Heap and Factory to be AllocateRaw,
      > and all object initialization work after (possibly retried) successful
      > raw allocation happens in the Factory.
      > 
      > This saves about 20KB of binary size on x64.
      > 
      > Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
      > Change-Id: Icbfdc4266d7be8b48d2fe085f03411743dc6a0ca
      > Reviewed-on: https://chromium-review.googlesource.com/959533
      > Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
      > Reviewed-by: Hannes Payer <hpayer@chromium.org>
      > Reviewed-by: Yang Guo <yangguo@chromium.org>
      > Cr-Commit-Position: refs/heads/master@{#52416}
      
      TBR=jkummerow@chromium.org,yangguo@chromium.org,mstarzinger@chromium.org,hpayer@chromium.org
      
      Change-Id: Idbbc53478742f3e9525eee83342afc6aedae122f
      No-Presubmit: true
      No-Tree-Checks: true
      No-Try: true
      Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
      Reviewed-on: https://chromium-review.googlesource.com/999414Reviewed-by: 's avatarMichael Achenbach <machenbach@chromium.org>
      Commit-Queue: Michael Achenbach <machenbach@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#52420}
      503e07c3
    • Jakob Kummerow's avatar
      [cleanup] Refactor the Factory · f9a2e24b
      Jakob Kummerow authored
      There is no good reason to have the meat of most objects' initialization
      logic in heap.cc, all wrapped by the CALL_HEAP_FUNCTION macro. Instead,
      this CL changes the protocol between Heap and Factory to be AllocateRaw,
      and all object initialization work after (possibly retried) successful
      raw allocation happens in the Factory.
      
      This saves about 20KB of binary size on x64.
      
      Cq-Include-Trybots: luci.v8.try:v8_linux_noi18n_rel_ng
      Change-Id: Icbfdc4266d7be8b48d2fe085f03411743dc6a0ca
      Reviewed-on: https://chromium-review.googlesource.com/959533
      Commit-Queue: Jakob Kummerow <jkummerow@chromium.org>
      Reviewed-by: 's avatarHannes Payer <hpayer@chromium.org>
      Reviewed-by: 's avatarYang Guo <yangguo@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#52416}
      f9a2e24b
  5. 05 Apr, 2018 1 commit
    • jgruber's avatar
      Rename Code::instruction_{start,end,size} functions · 7b29fe43
      jgruber authored
      In order to clarify the difference between, e.g., InstructionStart and
      instruction_start, rename as follows:
      
      Code::instruction_start -> raw_instruction_start
      Code::instruction_end   -> raw_instruction_end
      Code::instruction_size  -> raw_instruction_size
      
      The difference between the camel-case and raw_* function families is
      in how they handle off-heap-trampoline Code objects. For example, when
      called on an off-heap-trampoline: raw_instruction_start returns the
      trampoline's entry point, while InstructionStart returns the off-heap
      code's entry point (located in the .text section of the binary).
      
      Some callsites were updated to call the camel-case function family as
      appropriate.
      
      Bug: v8:6666
      Change-Id: I4a572f47c2d161a853599d7c17879e263b0d1a87
      Reviewed-on: https://chromium-review.googlesource.com/997532
      Commit-Queue: Jakob Gruber <jgruber@chromium.org>
      Reviewed-by: 's avatarMichael Starzinger <mstarzinger@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#52387}
      7b29fe43
  6. 04 Jan, 2018 1 commit
  7. 07 Dec, 2017 1 commit
  8. 14 Nov, 2017 1 commit
    • Bill Budge's avatar
      Reland "[Memory] Use OS::Allocate for all OS memory allocations." · adc52af5
      Bill Budge authored
      This is a reland of 4899bcb6
      This is a reland of b73ee334
      
      Original change's description:
      > [Memory] Use OS::Allocate for all OS memory allocations.
      >
      > - Eliminates OS::ReserveRegion and OS::ReserveAlignedRegion.
      > - Changes OS::Allocate to take alignment parameter, reorders parameters
      >   to match page_allocator.
      > - Since the size of memory allocation can be deduced, don't return the
      >   amount of memory allocated.
      > - Changes reservation of aligned address space. Before we would reserve
      >   (size + alignment) rounded up to page size. This is too much, because
      >   maximum misalignment is (alignment - page_size).
      > - On Windows and Cygwin, we release an oversize allocation and
      >   immediately retry at the aligned address in the allocation. If we
      >   lose the address due to a race, we just retry.
      > - Clean up all the calls to OS::Allocate in codegen and tests by adding
      >   helper AllocateSystemPage function (allocation.h) and
      >   AllocateAssemblerBuffer (cctest.h).
      > - Changes 'assm' to 'masm' in some targets for consistency when using
      >   a macro-assembler.
      >
      > - Eliminates OS::ReleaseRegion, replacing with calls to OS::Free.
      > - Adds bool return value to OS::Free.
      > - Cleans up types of flags, protection on Windows and Cygwin.
      
      > Bug: chromium:756050
      > Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
      > Change-Id: I306dbe042cc867670fdc935abca29db074b0da71
      
      Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
      Change-Id: Iad3c025334e8f8d7d647be99a36a11ee449c9087
      Reviewed-on: https://chromium-review.googlesource.com/767014
      Commit-Queue: Bill Budge <bbudge@chromium.org>
      Reviewed-by: 's avatarMichael Lippautz <mlippautz@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#49363}
      adc52af5
  9. 11 Nov, 2017 1 commit
  10. 09 Nov, 2017 1 commit
    • Bill Budge's avatar
      Reland "[Memory] Use OS::Allocate for all OS memory allocations." · 4899bcb6
      Bill Budge authored
      This is a reland of 7e78506f
      Original change's description:
      > [Memory] Use OS::Allocate for all OS memory allocations.
      > 
      > - Eliminates OS::ReserveRegion and OS::ReserveAlignedRegion.
      > - Changes OS::Allocate to take alignment parameter, reorders parameters
      >   to match page_allocator.
      > - Since the size of memory allocation can be deduced, don't return the
      >   amount of memory allocated.
      > - Changes reservation of aligned address space. Before we would reserve
      >   (size + alignment) rounded up to page size. This is too much, because
      >   maximum misalignment is (alignment - page_size).
      > - On Windows and Cygwin, we release an oversize allocation and
      >   immediately retry at the aligned address in the allocation. If we
      >   lose the address due to a race, we just retry.
      > - Clean up all the calls to OS::Allocate in codegen and tests by adding
      >   helper AllocateSystemPage function (allocation.h) and
      >   AllocateAssemblerBuffer (cctest.h).
      > - Changes 'assm' to 'masm' in some targets for consistency when using
      >   a macro-assembler.
      > 
      > Bug: chromium:756050
      > Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
      > Change-Id: I306dbe042cc867670fdc935abca29db074b0da71
      > Reviewed-on: https://chromium-review.googlesource.com/749848
      > Commit-Queue: Bill Budge <bbudge@chromium.org>
      > Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
      > Reviewed-by: Hannes Payer <hpayer@chromium.org>
      > Cr-Commit-Position: refs/heads/master@{#49235}
      
      Bug: chromium:756050
      Change-Id: I333f7a6aea0bcb608d01cafb43e94893a4625b15
      Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
      Reviewed-on: https://chromium-review.googlesource.com/758509Reviewed-by: 's avatarMichael Lippautz <mlippautz@chromium.org>
      Commit-Queue: Bill Budge <bbudge@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#49273}
      4899bcb6
  11. 08 Nov, 2017 2 commits
    • Bill Budge's avatar
      Revert "[Memory] Use OS::Allocate for all OS memory allocations." · 1ea3fd2e
      Bill Budge authored
      This reverts commit 7e78506f.
      
      Reason for revert: Broke Android build on Arm64.
      
      Original change's description:
      > [Memory] Use OS::Allocate for all OS memory allocations.
      > 
      > - Eliminates OS::ReserveRegion and OS::ReserveAlignedRegion.
      > - Changes OS::Allocate to take alignment parameter, reorders parameters
      >   to match page_allocator.
      > - Since the size of memory allocation can be deduced, don't return the
      >   amount of memory allocated.
      > - Changes reservation of aligned address space. Before we would reserve
      >   (size + alignment) rounded up to page size. This is too much, because
      >   maximum misalignment is (alignment - page_size).
      > - On Windows and Cygwin, we release an oversize allocation and
      >   immediately retry at the aligned address in the allocation. If we
      >   lose the address due to a race, we just retry.
      > - Clean up all the calls to OS::Allocate in codegen and tests by adding
      >   helper AllocateSystemPage function (allocation.h) and
      >   AllocateAssemblerBuffer (cctest.h).
      > - Changes 'assm' to 'masm' in some targets for consistency when using
      >   a macro-assembler.
      > 
      > Bug: chromium:756050
      > Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
      > Change-Id: I306dbe042cc867670fdc935abca29db074b0da71
      > Reviewed-on: https://chromium-review.googlesource.com/749848
      > Commit-Queue: Bill Budge <bbudge@chromium.org>
      > Reviewed-by: Michael Lippautz <mlippautz@chromium.org>
      > Reviewed-by: Hannes Payer <hpayer@chromium.org>
      > Cr-Commit-Position: refs/heads/master@{#49235}
      
      TBR=bbudge@chromium.org,hpayer@chromium.org,mlippautz@chromium.org
      
      Change-Id: Ic09de4d63c19746a62e804b1f889817ffaebc330
      No-Presubmit: true
      No-Tree-Checks: true
      No-Try: true
      Bug: chromium:756050
      Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
      Reviewed-on: https://chromium-review.googlesource.com/758625Reviewed-by: 's avatarBill Budge <bbudge@chromium.org>
      Commit-Queue: Bill Budge <bbudge@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#49242}
      1ea3fd2e
    • Bill Budge's avatar
      [Memory] Use OS::Allocate for all OS memory allocations. · 7e78506f
      Bill Budge authored
      - Eliminates OS::ReserveRegion and OS::ReserveAlignedRegion.
      - Changes OS::Allocate to take alignment parameter, reorders parameters
        to match page_allocator.
      - Since the size of memory allocation can be deduced, don't return the
        amount of memory allocated.
      - Changes reservation of aligned address space. Before we would reserve
        (size + alignment) rounded up to page size. This is too much, because
        maximum misalignment is (alignment - page_size).
      - On Windows and Cygwin, we release an oversize allocation and
        immediately retry at the aligned address in the allocation. If we
        lose the address due to a race, we just retry.
      - Clean up all the calls to OS::Allocate in codegen and tests by adding
        helper AllocateSystemPage function (allocation.h) and
        AllocateAssemblerBuffer (cctest.h).
      - Changes 'assm' to 'masm' in some targets for consistency when using
        a macro-assembler.
      
      Bug: chromium:756050
      Cq-Include-Trybots: master.tryserver.chromium.linux:linux_chromium_rel_ng
      Change-Id: I306dbe042cc867670fdc935abca29db074b0da71
      Reviewed-on: https://chromium-review.googlesource.com/749848
      Commit-Queue: Bill Budge <bbudge@chromium.org>
      Reviewed-by: 's avatarMichael Lippautz <mlippautz@chromium.org>
      Reviewed-by: 's avatarHannes Payer <hpayer@chromium.org>
      Cr-Commit-Position: refs/heads/master@{#49235}
      7e78506f
  12. 03 Nov, 2017 1 commit
  13. 18 Oct, 2017 1 commit
    • Pierre Langlois's avatar
      Simplify DoubleToI stub. · 9f4f3c28
      Pierre Langlois authored
      The DoubleToI stub is no longer called outside of TurboFan, and always in the
      same way:
      
        - The parameter is on top of the stack.
        - The stub is always called in a slow path.
        - It truncates.
      
      Therefore, we can simplify it to only support this case and remove dead
      code.
      
      On top of this, since the stub is always considered to be on a slow path for all
      backends, this patch takes the opportunity to remove the `skip_fastpath`
      optimisation. This would generate a stub which does not handle all inputs,
      assuming that the backend already handled some of the inputs in a fast
      path. Removing this allows the stub to have the same behaviour on all targets.
      
      On Arm, this patch reworks the stub a little. We could use ip instead of saving
      and restoring a register on the stack. Also, comments would mention that we
      assume the exponent to be greater than 31 when the it can be 30 or higher. As
      done for Arm64, let's check this at runtime in debug mode.
      
      On Arm64, we can also implement the stub without pushing and poping off the
      stack. It needs 2 general purpose and a double scratch registers which we have
      reserved already (ip0, ip1 and d30). This removes the need to check that the
      stack pointer is always 16-bytes aligned.
      
      Finally, this also fixes a potential bug on Arm64, in the
      `GetAllocatableRegisterThatIsNotOneOf` method which is now removed. We were
      picking an allocatable double register when we meant to pick a general one.
      
      Bug: v8:6644
      Change-Id: I88d4597f377c9fc05432d5922a0d7129b6d19b47
      Reviewed-on: https://chromium-review.googlesource.com/720963Reviewed-by: 's avatarBenedikt Meurer <bmeurer@chromium.org>
      Reviewed-by: 's avatarMichael Starzinger <mstarzinger@chromium.org>
      Commit-Queue: Pierre Langlois <pierre.langlois@arm.com>
      Cr-Commit-Position: refs/heads/master@{#48671}
      9f4f3c28
  14. 13 Sep, 2017 1 commit
  15. 07 Sep, 2017 1 commit
  16. 01 Sep, 2017 1 commit
  17. 03 Aug, 2017 1 commit
  18. 31 May, 2017 1 commit
    • neis's avatar
      [compiler] Delay allocation of code-embedded heap numbers. · 659e8f7b
      neis authored
      Instead of allocating and embedding certain heap numbers into the code
      during code assembly, emit dummies but record the allocation requests.
      Later then, in Assembler::GetCode, allocate the heap numbers and patch
      the code by replacing the dummies with the actual objects. The
      RelocInfos for the embedded objects are already recorded correctly when
      emitting the dummies.
      
      R=jarin@chromium.org
      BUG=v8:6048
      
      Review-Url: https://codereview.chromium.org/2900683002
      Cr-Commit-Position: refs/heads/master@{#45635}
      659e8f7b
  19. 27 Jun, 2016 1 commit
  20. 09 Dec, 2015 1 commit
  21. 25 Nov, 2015 1 commit
  22. 16 Nov, 2015 1 commit
  23. 02 Oct, 2015 3 commits
    • danno's avatar
      Re-reland: Remove register index/code indirection · 5cf1c0bc
      danno authored
      Previous to this patch, both the lithium and TurboFan register
      allocators tracked allocated registers by "indices", rather than
      the register codes used elsewhere in the runtime. This patch
      ensures that codes are used everywhere, and in the process cleans
      up a bunch of redundant code and adds more structure to how the
      set of allocatable registers is defined.
      
      Some highlights of changes:
      
      * TurboFan's RegisterConfiguration class moved to V8's top level
        so that it can be shared with Crankshaft.
      * Various "ToAllocationIndex" and related methods removed.
      * Code that can be easily shared between Register classes on
        different platforms is now shared.
      * The list of allocatable registers on each platform is declared
        as a list rather than implicitly via the register index <->
        code mapping.
      
      Committed: https://crrev.com/80bc6f6e11f79524e3f1ad05579583adfd5f18b2
      Cr-Commit-Position: refs/heads/master@{#30913}
      
      Committed: https://crrev.com/7b7a8205d9a00c678fb7a6e032a55fecbc1509cf
      Cr-Commit-Position: refs/heads/master@{#31075}
      
      Review URL: https://codereview.chromium.org/1287383003
      
      Cr-Commit-Position: refs/heads/master@{#31087}
      5cf1c0bc
    • danno's avatar
      Revert of Reland: Remove register index/code indirection (patchset #20... · 00e07b00
      danno authored
      Revert of Reland: Remove register index/code indirection (patchset #20 id:380001 of https://codereview.chromium.org/1287383003/ )
      
      Reason for revert:
      Failures on MIPS
      
      Original issue's description:
      > Remove register index/code indirection
      >
      > Previous to this patch, both the lithium and TurboFan register
      > allocators tracked allocated registers by "indices", rather than
      > the register codes used elsewhere in the runtime. This patch
      > ensures that codes are used everywhere, and in the process cleans
      > up a bunch of redundant code and adds more structure to how the
      > set of allocatable registers is defined.
      >
      > Some highlights of changes:
      >
      > * TurboFan's RegisterConfiguration class moved to V8's top level
      >   so that it can be shared with Crankshaft.
      > * Various "ToAllocationIndex" and related methods removed.
      > * Code that can be easily shared between Register classes on
      >   different platforms is now shared.
      > * The list of allocatable registers on each platform is declared
      >   as a list rather than implicitly via the register index <->
      >   code mapping.
      >
      > Committed: https://crrev.com/80bc6f6e11f79524e3f1ad05579583adfd5f18b2
      > Cr-Commit-Position: refs/heads/master@{#30913}
      >
      > Committed: https://crrev.com/7b7a8205d9a00c678fb7a6e032a55fecbc1509cf
      > Cr-Commit-Position: refs/heads/master@{#31075}
      
      TBR=akos.palfi@imgtec.com,bmeurer@chromium.org,jarin@chromium.org,paul.lind@imgtec.com,titzer@chromium.org
      NOPRESUBMIT=true
      NOTREECHECKS=true
      NOTRY=true
      
      Review URL: https://codereview.chromium.org/1380863004
      
      Cr-Commit-Position: refs/heads/master@{#31083}
      00e07b00
    • danno's avatar
      Remove register index/code indirection · 7b7a8205
      danno authored
      Previous to this patch, both the lithium and TurboFan register
      allocators tracked allocated registers by "indices", rather than
      the register codes used elsewhere in the runtime. This patch
      ensures that codes are used everywhere, and in the process cleans
      up a bunch of redundant code and adds more structure to how the
      set of allocatable registers is defined.
      
      Some highlights of changes:
      
      * TurboFan's RegisterConfiguration class moved to V8's top level
        so that it can be shared with Crankshaft.
      * Various "ToAllocationIndex" and related methods removed.
      * Code that can be easily shared between Register classes on
        different platforms is now shared.
      * The list of allocatable registers on each platform is declared
        as a list rather than implicitly via the register index <->
        code mapping.
      
      Committed: https://crrev.com/80bc6f6e11f79524e3f1ad05579583adfd5f18b2
      Cr-Commit-Position: refs/heads/master@{#30913}
      
      Review URL: https://codereview.chromium.org/1287383003
      
      Cr-Commit-Position: refs/heads/master@{#31075}
      7b7a8205
  24. 28 Sep, 2015 1 commit
  25. 24 Sep, 2015 2 commits
    • danno's avatar
      Revert of Remove register index/code indirection (patchset #17 id:320001 of... · 3ac27431
      danno authored
      Revert of Remove register index/code indirection (patchset #17 id:320001 of https://codereview.chromium.org/1287383003/ )
      
      Reason for revert:
      Failures on greedy RegAlloc, Fuzzer
      
      Original issue's description:
      > Remove register index/code indirection
      >
      > Previous to this patch, both the lithium and TurboFan register
      > allocators tracked allocated registers by "indices", rather than
      > the register codes used elsewhere in the runtime. This patch
      > ensures that codes are used everywhere, and in the process cleans
      > up a bunch of redundant code and adds more structure to how the
      > set of allocatable registers is defined.
      >
      > Some highlights of changes:
      >
      > * TurboFan's RegisterConfiguration class moved to V8's top level
      >   so that it can be shared with Crankshaft.
      > * Various "ToAllocationIndex" and related methods removed.
      > * Code that can be easily shared between Register classes on
      >   different platforms is now shared.
      > * The list of allocatable registers on each platform is declared
      >   as a list rather than implicitly via the register index <->
      >   code mapping.
      >
      > Committed: https://crrev.com/80bc6f6e11f79524e3f1ad05579583adfd5f18b2
      > Cr-Commit-Position: refs/heads/master@{#30913}
      
      TBR=akos.palfi@imgtec.com,bmeurer@chromium.org,jarin@chromium.org,paul.lind@imgtec.com,titzer@chromium.org
      NOPRESUBMIT=true
      NOTREECHECKS=true
      NOTRY=true
      
      Review URL: https://codereview.chromium.org/1365073002
      
      Cr-Commit-Position: refs/heads/master@{#30914}
      3ac27431
    • danno's avatar
      Remove register index/code indirection · 80bc6f6e
      danno authored
      Previous to this patch, both the lithium and TurboFan register
      allocators tracked allocated registers by "indices", rather than
      the register codes used elsewhere in the runtime. This patch
      ensures that codes are used everywhere, and in the process cleans
      up a bunch of redundant code and adds more structure to how the
      set of allocatable registers is defined.
      
      Some highlights of changes:
      
      * TurboFan's RegisterConfiguration class moved to V8's top level
        so that it can be shared with Crankshaft.
      * Various "ToAllocationIndex" and related methods removed.
      * Code that can be easily shared between Register classes on
        different platforms is now shared.
      * The list of allocatable registers on each platform is declared
        as a list rather than implicitly via the register index <->
        code mapping.
      
      Review URL: https://codereview.chromium.org/1287383003
      
      Cr-Commit-Position: refs/heads/master@{#30913}
      80bc6f6e
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