v8/test
zhengxing.li 3145befb3d [turbofan][X64] Movzxbl/Movsxbl/Movzxwl/Movsxwl also zero extend to 64bit.
movzxbl/movsxbl/movzxwl/movsxwl operations implicitly zero-extend to 64-bit on x64, So It's not necessary to generate a "movl" instruction to zero-extend.

  For example, movzxbl/movl instruction sequence occurs frequently in v8 interpreter bytecode handler.
  such as:
  kind = BYTECODE_HANDLER
  name = LdaSmi
  compiler = turbofan
  Instructions (size = 76)
  0x184870a3ce40 0 430fbe442601 movsxbl rax,[r14+r12*1+0x1]
  0x184870a3ce46 6 48c1e020 REX.W shlq rax, 32
  0x184870a3ce4a 10 498d5c2402 REX.W leaq rbx,[r12+0x2]
  0x184870a3ce4f 15 420fb61433 movzxbl rdx,[rbx+r14*1]
  0x184870a3ce54 20 8bd2 movl rdx,rdx          <---------------------- here is a redundant "movl"
  0x184870a3ce56 22 4883fa1e REX.W cmpq rdx,0x1e
  0x184870a3ce5a 26 0f8518000000 jnz 56 (0x184870a3ce78)

  This CL also referenced to CL  (https://codereview.chromium.org/1950013003 ) for adding test cases.

BUG=

Review-Url: https://codereview.chromium.org/2427483002
Cr-Commit-Position: refs/heads/master@{#40375}
2016-10-18 03:40:37 +00:00
..
benchmarks [gn] Move build to gypfiles 2016-04-29 10:11:11 +00:00
cctest Named all zones in the project 2016-10-17 12:12:42 +00:00
common Named all zones in the project 2016-10-17 12:12:42 +00:00
fuzzer Named all zones in the project 2016-10-17 12:12:42 +00:00
inspector Revert of [debug] Consistently use script from FrameMirror (patchset id:40001 of https://codereview.chromium.org/2415073003/ ) 2016-10-17 12:38:12 +00:00
intl [wasm] asm.js: Add asm_wasm variant to test asm.js->wasm pipeline. 2016-09-19 23:57:13 +00:00
js-perf-test [test] Bump js-test strings timeout even more 2016-10-13 12:29:36 +00:00
memory [snapshot] support multiple contexts in the same snapshot. 2016-06-15 15:39:06 +00:00
message [es8] Remove syntactic tail calls support. 2016-09-28 08:25:45 +00:00
mjsunit [wasm] Implement Table#set and Table#grow 2016-10-17 11:39:34 +00:00
mozilla Skip some mozilla tests on turbofan_opt as they consistently timeout 2016-10-07 22:41:42 +00:00
preparser [gn] Move build to gypfiles 2016-04-29 10:11:11 +00:00
promises-aplus Make test262 test runner check for which exception is thrown 2016-03-14 21:20:37 +00:00
simdjs [test] Deprecate test data download for most test suites 2016-08-08 12:39:48 +00:00
test262 [builtins] implement Array.prototype[@@iterator] in TFJ builtins 2016-10-18 02:43:14 +00:00
unittests [turbofan][X64] Movzxbl/Movsxbl/Movzxwl/Movsxwl also zero extend to 64bit. 2016-10-18 03:40:37 +00:00
webkit [wasm] asm.js: Add asm_wasm variant to test asm.js->wasm pipeline. 2016-09-19 23:57:13 +00:00
bot_default.gyp [inspector] Remove inspector_protocol_parser_test target. 2016-08-11 16:45:14 +00:00
bot_default.isolate [inspector] Add swarming support to inspector tests 2016-10-12 07:32:06 +00:00
BUILD.gn [inspector] Add swarming support to inspector tests 2016-10-12 07:32:06 +00:00
default.gyp [inspector] Remove inspector_protocol_parser_test target. 2016-08-11 16:45:14 +00:00
default.isolate [inspector] Remove inspector_protocol_parser_test target. 2016-08-11 16:45:14 +00:00
optimize_for_size.gyp [gn] Move build to gypfiles 2016-04-29 10:11:11 +00:00
optimize_for_size.isolate [inspector] Add swarming support to inspector tests 2016-10-12 07:32:06 +00:00
perf.gyp [gn] Move build to gypfiles 2016-04-29 10:11:11 +00:00
perf.isolate [Swarming] Isolate perf tests. 2016-02-15 11:17:18 +00:00