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  1. 13 Jun, 2016 2 commits
  3. 10 Jun, 2016 1 commit
    • Subzero: Improve effectiveness of local register availability peephole. · f531931f
      Jim Stichnoth authored 
      X86 only.  The register availability peephole optimization during lowering disallows available register substitution when the variable is pre-colored.  This is for good reasons (too complex to be discussed here).  However, that leaves some potential substitutions on the table.

Specifically, this happens a lot around register arguments to function calls, both at the call site and in the prolog.

The simplest solution seems to be to launder the pre-colored variable through a separate infinite-weight variable, as implemented in this CL through a combination of such copies and extra legalize() calls.

There are other situations where this technique can also work, which may be handled in a separate CL.

This CL also fixes a problem where the stack pointer adjustment in the prolog is subject to dead-code elimination if the function has no epilog.  This would only happen in asm-verbose mode, in the final liveness analysis pass prior to code emission.

BUG= none
R=eholk@chromium.org

Review URL: https://codereview.chromium.org/2052683003 .
  5. 09 Jun, 2016 1 commit
  7. 07 Jun, 2016 1 commit
  9. 02 Jun, 2016 1 commit
  11. 01 Jun, 2016 1 commit
  13. 31 May, 2016 3 commits
  15. 30 May, 2016 1 commit
  17. 27 May, 2016 1 commit
  19. 24 May, 2016 2 commits
  21. 18 May, 2016 1 commit
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  25. 12 May, 2016 1 commit
  27. 10 May, 2016 1 commit
  29. 09 May, 2016 2 commits
  31. 06 May, 2016 1 commit
  33. 02 May, 2016 2 commits
  35. 29 Apr, 2016 1 commit
  37. 27 Apr, 2016 1 commit
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  41. 25 Apr, 2016 2 commits
  43. 22 Apr, 2016 2 commits
  45. 21 Apr, 2016 4 commits
  47. 20 Apr, 2016 1 commit
    • Subzero: Allow overriding command-line args from the browser. · fd07ad08
      Jim Stichnoth authored 
      In the browser build only, allows arguments to be explicitly passed to pnacl-sz, in two ways:

1. The SZARGFILE envvar contains the name of a file with arguments, one per line.  For each line, initial whitespace is ignored, and lines starting with the '#' comment character are also ignored.

2. The SZARGLIST envvar contains all the arguments, separated by the '|' character.

Chrome needs to be started with special options to allow the envvars to be passed through, and also to allow access to the local file system.

In addition, specifying "-log=/dev/stderr" or "-o /dev/stderr" gets mapped to std::cerr, in the same way "-" gets mapped to std::cout.

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4370
R=jpp@chromium.org

Review URL: https://codereview.chromium.org/1903553004 .
  49. 19 Apr, 2016 1 commit
  51. 18 Apr, 2016 3 commits
  53. 15 Apr, 2016 1 commit
    • Subzero. WASM. Additional progress. · 67c7c416
      Eric Holk authored 
      This change includes a number of improvements since the last WASM
CL. It compiles against a newer version of V8 that matches the current
WASM binary format. Many more WASM instructions are supported, as well
as global variable initializers.

There is also the beginning of a runtime library that implements some
system calls required by the WASM C library. The c2wasm-exe.sh script
can be used to compile a C program to a .wasm module, which is then
compiled by Subzero into a native executable.

This change includes a new Breakpoint instruction, which inserts an
unconditional breakpoint into the executable. This has been helpful in
debugging code generation for some WASM instructions. The Breakpoint
instruction is only completely implemented on X86.

BUG= https://bugs.chromium.org/p/nativeclient/issues/detail?id=4369
R=stichnot@chromium.org

Review URL: https://codereview.chromium.org/1876413002 .