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383ec7b506
v8/test/unittests/compiler
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Jaroslav Sevcik 383ec7b506 [turbofan] IA32 port of branch load poisoning. 
The tricky part here is to take away one register from register
allocation for the mask. The only problem is with calls that need
an input operand to be passed in the poison register. For such calls,
we change the register constraint in the instruction selector
to pass the value in whatever place the register allocator sees fit.
During code generation, we then copy the value from that place
to the poison register. By that time, the mask is not necessary
(once we bake the mask into the target, it should be done before
this move).

For the branches, the mask update does not use cmov (unlike x64)
because cmov does not take an immediate and we do not have
a scratch register. Instead we use bit-twiddling tricks
(suggested by @tebbi). For example, here is the code for masking
register update after a bailout on non-zero:

  jnz deopt_bailout    ;; Bailout branch
  setnz bl             ;; These three instructions update the mask
  add  ebx, 255
  sar  ebx, 31

(On x64, the sequence is:

  jnz deopt_bailout
  mov r10, 0      ;; We have a scratch register for zero
  cmovnz r9, r10  ;; Set to zero if we execute this branch
                  ;; in branch mis-speculation
)


This CL also fixes a bug in register configuration, where we used
to wrongly restrict the array of register name.

Change-Id: I5fceff2faf8bdc527d9934afc284b749574ab69e
Bug: chromium:798964
Reviewed-on: https://chromium-review.googlesource.com/946251
Commit-Queue: Jaroslav Sevcik <jarin@chromium.org>
Reviewed-by: Benedikt Meurer <bmeurer@chromium.org>
Reviewed-by: Michael Starzinger <mstarzinger@chromium.org>
Cr-Commit-Position: refs/heads/master@{#51798}
2018-03-08 08:25:42 +00:00
..
arm [arm][arm64] Implement {kSpeculationFence} operator. 2018-01-29 13:43:53 +00:00
arm64 [arm][arm64] Implement {kSpeculationFence} operator. 2018-01-29 13:43:53 +00:00
ia32 [turbofan] Remove unused instruction continuation handling for stack checks. 2018-01-29 09:07:07 +00:00
mips [MIPS] Add Sreten Kovacevic as owner of MIPS files 2018-02-09 15:35:49 +00:00
mips64 [MIPS] Add Sreten Kovacevic as owner of MIPS files 2018-02-09 15:35:49 +00:00
ppc PPC/s390: [iwyu] Remove illegal inline include from "macro-assembler.h" 2017-09-14 12:23:51 +00:00
regalloc Remove mtrofin and rossberg from OWNERS 2018-02-15 23:48:43 +00:00
s390 PPC/s390: [iwyu] Remove illegal inline include from "macro-assembler.h" 2017-09-14 12:23:51 +00:00
x64 [turbofan] Remove unused instruction continuation handling for stack checks. 2018-01-29 09:07:07 +00:00
branch-elimination-unittest.cc Revert "[TurboFan] Diagnostic code to track down bug in representation selection" 2017-11-14 09:26:51 +00:00
bytecode-analysis-unittest.cc [Compiler] Remove isolate from CompilationInfo. 2017-11-15 15:40:55 +00:00
checkpoint-elimination-unittest.cc [turbofan] Rename {CheckPoint} to {Checkpoint} everywhere. 2016-06-01 09:07:19 +00:00
code-assembler-unittest.cc [csa] Transform multiplications into left shifts 2017-11-10 18:29:11 +00:00
code-assembler-unittest.h [csa] Add constant folding more universally to CodeAssembler operators 2017-09-12 10:03:10 +00:00
common-operator-reducer-unittest.cc [turbofan] Eliminate switch operations with constant input. 2018-02-01 13:23:52 +00:00
common-operator-unittest.cc Reland "[turbofan] Preserve order of compares in switches" 2018-03-02 12:03:42 +00:00
compiler-test-utils.h [turbofan] Drop V8_TURBOFAN_BACKEND and V8_TURBOFAN_TARGET defines. 2015-08-10 07:17:34 +00:00
control-equivalence-unittest.cc This CL enables precise source positions for all V8 compilers. It merges compiler::SourcePosition and internal::SourcePosition to a single class used throughout the codebase. The new internal::SourcePosition instances store an id identifying an inlined function in addition to a script offset. 2016-11-14 17:22:32 +00:00
control-flow-optimizer-unittest.cc Reland "[turbofan] Preserve order of compares in switches" 2018-03-02 12:03:42 +00:00
dead-code-elimination-unittest.cc Reland^6 "[turbofan] eagerly prune None types and deadness from the graph" 2017-11-16 20:01:22 +00:00
diamond-unittest.cc [cleanup] [compiler] Fix (D)CHECK macros 2017-09-25 10:21:34 +00:00
effect-control-linearizer-unittest.cc [compiler] Introduce a new node for array index masking. 2017-12-20 12:30:26 +00:00
graph-reducer-unittest.cc [jumbo] add unittests jumbo support 2017-09-28 22:19:40 +00:00
graph-reducer-unittest.h [turbofan] Add AdvancedReducer::ReplaceWithValue() method and convert JSInlining to an AdvancedReducer. 2015-05-12 12:41:36 +00:00
graph-trimmer-unittest.cc [turbofan] Proper dead code elimination as regular reducer. 2015-06-19 12:07:26 +00:00
graph-unittest.cc [turbofan] maintain source positions in loop peeling and polymorphic inlining 2017-12-13 09:51:46 +00:00
graph-unittest.h [turbofan] maintain source positions in loop peeling and polymorphic inlining 2017-12-13 09:51:46 +00:00
instruction-selector-unittest.cc [turbofan] IA32 port of branch load poisoning. 2018-03-08 08:25:42 +00:00
instruction-selector-unittest.h [turbofan] Remove ToFloat64AsInt and make ToFloat64 return a Double 2017-07-14 15:01:02 +00:00
instruction-sequence-unittest.cc Replace CHECK(false) by UNREACHABLE() 2017-12-19 18:58:07 +00:00
instruction-sequence-unittest.h MIPS: Reland of Fix bad RegisterConfiguration usage in InstructionSequence unit tests 2016-12-23 10:51:08 +00:00
instruction-unittest.cc [jumbo] add unittests jumbo support 2017-09-28 22:19:40 +00:00
int64-lowering-unittest.cc [cleanup] Remove OpParameter(Node*) helper 2018-03-05 10:05:05 +00:00
js-builtin-reducer-unittest.cc Reland "[turbofan] Move String.* functions to JSCallReducer" 2018-02-23 13:43:28 +00:00
js-call-reducer-unittest.cc Reland "[turbofan] Move String.* functions to JSCallReducer" 2018-02-23 13:43:28 +00:00
js-create-lowering-unittest.cc [turbofan] Properly optimize literals in inlined functions. 2017-09-25 13:05:16 +00:00
js-intrinsic-lowering-unittest.cc [TurboFan] Broken effect chain in IsInstanceType reduction 2017-10-18 13:50:41 +00:00
js-operator-unittest.cc [TurboFan] Model TypeOf as a simplified operator 2017-10-16 19:15:00 +00:00
js-typed-lowering-unittest.cc [turbofan] Introduce a dedicated StringLength operator. 2017-11-30 06:55:06 +00:00
linkage-tail-call-unittest.cc Reland "[arm64] Preparation for padding of arguments" 2017-12-20 13:50:36 +00:00
live-range-builder.h [turbofan] Make MachineType a pair of enums. 2015-12-10 09:03:53 +00:00
load-elimination-unittest.cc [turbofan] Fix introduction of contradicting {TypeGuard}. 2017-08-08 11:54:51 +00:00
loop-peeling-unittest.cc [turbofan] maintain source positions in loop peeling and polymorphic inlining 2017-12-13 09:51:46 +00:00
machine-operator-reducer-unittest.cc Normalize casing of hexadecimal digits 2017-12-02 01:24:40 +00:00
machine-operator-unittest.cc [jumbo] fix another set of unittest compilation errors 2017-10-19 09:15:44 +00:00
node-cache-unittest.cc [jumbo] add unittests jumbo support 2017-09-28 22:19:40 +00:00
node-matchers-unittest.cc [turbofan] Relax limitation for using BaseWithIndexAndDisplacement for load/stores 2017-02-24 06:38:14 +00:00
node-properties-unittest.cc [jumbo] add unittests jumbo support 2017-09-28 22:19:40 +00:00
node-test-utils.cc [cleanup] Remove OpParameter(Node*) helper 2018-03-05 10:05:05 +00:00
node-test-utils.h Reland "[turbofan] Preserve order of compares in switches" 2018-03-02 12:03:42 +00:00
node-unittest.cc [jumbo] fix another set of unittest compilation errors 2017-10-19 09:15:44 +00:00
opcodes-unittest.cc [unittests] Reduce compilation overhead of opcodes-unittest.cc. 2016-09-13 05:16:18 +00:00
persistent-unittest.cc [turbofan] PersistentMap: Allow hash values larger than 32bit and some cleanup 2018-01-18 13:58:15 +00:00
schedule-unittest.cc [jumbo] fix android/windows kDummyOperator collision 2017-10-20 12:43:57 +00:00
scheduler-rpo-unittest.cc Replace SmartPointer<T> with unique_ptr<T> 2016-07-25 11:14:34 +00:00
scheduler-unittest.cc This CL enables precise source positions for all V8 compilers. It merges compiler::SourcePosition and internal::SourcePosition to a single class used throughout the codebase. The new internal::SourcePosition instances store an id identifying an inlined function in addition to a script offset. 2016-11-14 17:22:32 +00:00
simplified-lowering-unittest.cc [turbofan] Lower NumberConstant nodes to IntPtrConstant. 2018-01-15 10:46:01 +00:00
simplified-operator-reducer-unittest.cc [turbofan] Add feedback to CheckSmi 2017-12-18 15:52:38 +00:00
simplified-operator-unittest.cc [jumbo] fix another set of unittest compilation errors 2017-10-19 09:15:44 +00:00
state-values-utils-unittest.cc Enable clang's -Wunreachable-code warning. 2017-12-04 13:09:25 +00:00
typed-optimization-unittest.cc [turbofan] Remove the unused ToBooleanHints. 2017-11-20 09:42:38 +00:00
typer-unittest.cc Remove %_ClassOf and SharedFunctionInfo::instance_class_name 2018-02-15 11:52:08 +00:00
value-numbering-reducer-unittest.cc [jumbo] fix another set of unittest compilation errors 2017-10-19 09:15:44 +00:00
zone-stats-unittest.cc Named all zones in the project 2016-10-17 12:12:42 +00:00