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    • Ross McIlroy's avatar
      [Deopt] Remove jump table in prologue of deopt entries. · 4ab96a9a
      Ross McIlroy authored 
      Remove the use of a jump table in the prologue of the deopt entries
and instead pass the bailout id explicitly in a register when calling
the deopt entry routine from optimized code. This unifies the logic
with the way the Arm64 code works. It saves the following amount of
memory in code stubs:

 - arm:  384KB
 - ia32: 480KB
 - x64:  240KB

This could be offset by a slight increase in the size of optimized code
for loading the immediate, however this impact should be minimal and
will scale with the maximum number of bailout ids (e.g., the size of
code will increase by one instruction per bailout id on Arm, therefore
~98,000 bailouts will be needed before the overhead is greater than
the current fixed table size).

Change-Id: I838604b48fa04cbd45320c7b9dac0de08fd8eb25
Reviewed-on: https://chromium-review.googlesource.com/c/1398224
Commit-Queue: Ross McIlroy <rmcilroy@chromium.org>
Reviewed-by: 's avatarJaroslav Sevcik <jarin@chromium.org>
Cr-Commit-Position: refs/heads/master@{#58636}
      4ab96a9a
  39. 07 Dec, 2018 3 commits
  41. 19 Nov, 2018 1 commit
  43. 16 Nov, 2018 1 commit
    • Clemens Hammacher's avatar
      [iwyu] Ensure that macro assembler includes happen correctly · 1952f928
      Clemens Hammacher authored 
      The platform specific macro assembler headers can not be included
directly. They require symbols declared in macro-assembler.h.
We also cannot include macro-assembler.h from the platform specific
headers, because that would form a cycle, and the include in
macro-assembler.h would be skipped, which then also fails.

This CL documents and enforces this unfortunate situation.
This helps with further iwyu cleanups.

Note that current code which includes the platform specific headers
only works because we transitively included macro-assembler.h already
before.

R=mstarzinger@chromium.org

Bug: v8:8238, v8:7490
Change-Id: I2dc65ad950400941406e1f2f8969d0d15f524bf8
Reviewed-on: https://chromium-review.googlesource.com/c/1340240
Commit-Queue: Clemens Hammacher <clemensh@chromium.org>
Reviewed-by: 's avatarMichael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#57578}
      1952f928
  45. 11 Sep, 2018 1 commit
  47. 30 May, 2018 1 commit
    • Leszek Swirski's avatar
      [sfi] Compress function arg counts to 16 bit · 53d4dfc3
      Leszek Swirski authored 
      Compress the parameter count (and function length) stored in
SharedFunctionInfo to a uint16_t. This limits us to 2^16 - 1 parameters
per function, minus one for the "don't adapt arguments" sentinel value,
which is one fewer than Code::kMaxArguments was already. Anyway, 65534
arguments should be enough for anyone!

This drops SFI size by 4 bytes.

Bug: chromium:818642
Change-Id: I126bfb24453dcdc5087a104d3a12cf195a56fa9f
Reviewed-on: https://chromium-review.googlesource.com/1076627
Commit-Queue: Leszek Swirski <leszeks@chromium.org>
Reviewed-by: 's avatarBenedikt Meurer <bmeurer@chromium.org>
Cr-Commit-Position: refs/heads/master@{#53447}
      53d4dfc3
  49. 26 Apr, 2018 3 commits
  51. 21 Mar, 2018 3 commits
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