Commit Graph

914 Commits

Author SHA1 Message Date
mstarzinger
2620c4264a [turbofan] Remove eager frame state from add and subtract.
This removes the frame state input representing the before-state from
nodes having the {JSAdd} or the {JSSubtract} operator. Lowering that
inserts number conversions of the inputs has to be disabled when
deoptimization is enabled, because the frame state layout is no longer
known.

R=jarin@chromium.org
BUG=v8:5021

Review-Url: https://codereview.chromium.org/2125593002
Cr-Commit-Position: refs/heads/master@{#37522}
2016-07-05 10:46:34 +00:00
bmeurer
72275e6620 [intrinsic] Drop the %_ValueOf intrinsic.
This drops the %_ValueOf intrinsic, but keeps the runtime entry
%ValueOf for now, by either migrating the functionality (mostly
Debug mirror or toString/valueOf methods) to C++ or TurboFan
builtins, or switching to the %ValueOf runtime call when it's
not performance critical anyways.

The %_ValueOf intrinsic was one of the last blockers for fixing
the unsound machine operator typing in TurboFan.

R=yangguo@chromium.org
BUG=v8:5049

Committed: https://crrev.com/293bd7882987f00e465710ce468bfb1eaa7d3fa2
Review-Url: https://codereview.chromium.org/2126453002
Cr-Original-Commit-Position: refs/heads/master@{#37512}
Cr-Commit-Position: refs/heads/master@{#37519}
2016-07-05 10:05:40 +00:00
mstarzinger
277fac44ff [turbofan] Remove eager frame state from JSMultiply.
This removes the frame state input representing the before-state from
nodes having the {JSMultiply} operator. Lowering that inserts number
conversions of the inputs has to be disabled when deoptimization is
enabled, because the frame state layout is no longer known.

R=jarin@chromium.org
BUG=v8:5021

Review-Url: https://codereview.chromium.org/2111193002
Cr-Commit-Position: refs/heads/master@{#37517}
2016-07-05 09:05:31 +00:00
machenbach
0960beb0ef Revert of [intrinsic] Drop the %_ValueOf intrinsic. (patchset #2 id:20001 of https://codereview.chromium.org/2126453002/ )
Reason for revert:
[Sheriff] Breaks without i18n:
https://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20noi18n%20-%20debug/builds/8466

Original issue's description:
> [intrinsic] Drop the %_ValueOf intrinsic.
>
> This drops the %_ValueOf intrinsic, but keeps the runtime entry
> %ValueOf for now, by either migrating the functionality (mostly
> Debug mirror or toString/valueOf methods) to C++ or TurboFan
> builtins, or switching to the %ValueOf runtime call when it's
> not performance critical anyways.
>
> The %_ValueOf intrinsic was one of the last blockers for fixing
> the unsound machine operator typing in TurboFan.
>
> R=yangguo@chromium.org
> BUG=v8:5049
>
> Committed: https://crrev.com/293bd7882987f00e465710ce468bfb1eaa7d3fa2
> Cr-Commit-Position: refs/heads/master@{#37512}

TBR=yangguo@chromium.org,bmeurer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:5049

Review-Url: https://codereview.chromium.org/2117273002
Cr-Commit-Position: refs/heads/master@{#37514}
2016-07-05 08:01:06 +00:00
bmeurer
293bd78829 [intrinsic] Drop the %_ValueOf intrinsic.
This drops the %_ValueOf intrinsic, but keeps the runtime entry
%ValueOf for now, by either migrating the functionality (mostly
Debug mirror or toString/valueOf methods) to C++ or TurboFan
builtins, or switching to the %ValueOf runtime call when it's
not performance critical anyways.

The %_ValueOf intrinsic was one of the last blockers for fixing
the unsound machine operator typing in TurboFan.

R=yangguo@chromium.org
BUG=v8:5049

Review-Url: https://codereview.chromium.org/2126453002
Cr-Commit-Position: refs/heads/master@{#37512}
2016-07-05 06:47:53 +00:00
bmeurer
0a0fe8fb8b [builtins] Unify most of the remaining Math builtins.
Import fdlibm versions of acos, acosh, asin and asinh, which are more
precise and produce the same result across platforms (we were using
libm versions for asin and acos so far, where both speed and precision
depended on the operating system so far). Introduce appropriate TurboFan
operators for these functions and use them both for inlining and for the
generic builtin.

Also migrate the Math.imul and Math.fround builtins to TurboFan builtins
to ensure that their behavior is always exactly the same as the inlined
TurboFan version (i.e. C++ truncation semantics for double to float
don't necessarily meet the JavaScript semantics).

For completeness, also migrate Math.sign, which can even get some nice
love in TurboFan.

Drive-by-fix: Some alpha-sorting on the Math related functions, and
cleanup the list of Math intrinsics that we have to export via the
native context currently.

BUG=v8:3266,v8:3496,v8:3509,v8:3952,v8:5169,v8:5170,v8:5171,v8:5172
TBR=rossberg@chromium.org
R=franzih@chromium.org

Review-Url: https://codereview.chromium.org/2116753002
Cr-Commit-Position: refs/heads/master@{#37476}
2016-07-01 11:13:02 +00:00
ahaas
de369129d2 [wasm] Detect unrepresentability in the float32-to-int32 conversion correctly on arm.
In the current implementation of wasm an unrepresentable input of the
float32-to-int32 conversion is detected by first truncating the input, then
converting the truncated input to int32 and back to float32, and then checking
whether the result is the same as the truncated input.

This input check does not work on arm and arm64 for an input of (INT32_MAX + 1)
because on these platforms the float32-to-int32 conversion results in INT32_MAX
if the input is greater than INT32_MAX.  When INT32_MAX is converted back to
float32, then the result is (INT32_MAX + 1) again because INT32_MAX cannot be
represented precisely as float32, and rounding-to-nearest results in (INT32_MAX
+ 1). Since (INT32_MAX + 1) equals the truncated input value, the input appears
to be representable.

With the changes in this CL, the result of the float32-to-int32 conversion is
incremented by 1 if the original result was INT32_MAX. Thereby the detection of
unrepresenable inputs in wasm works. Note that since INT32_MAX cannot be
represented precisely in float32, it can also never be a valid result of the
float32-to-int32 conversion.

@v8-mips-ports, can you do a similar implementation for mips?

R=titzer@chromium.org, Rodolph.Perfetta@arm.com

Review-Url: https://codereview.chromium.org/2105313002
Cr-Commit-Position: refs/heads/master@{#37448}
2016-06-30 14:30:44 +00:00
mvstanton
cede9ce5e1 [builtins] Unify Cosh, Sinh and Tanh as exports from flibm
BUG=v8:5086

Review-Url: https://codereview.chromium.org/2083573002
Cr-Commit-Position: refs/heads/master@{#37424}
2016-06-30 08:44:46 +00:00
jgruber
5febc27b5d [builtins] New frame type for exits to C++ builtins
Prior to this commit, calls to C++ builtins created standard exit
frames, which are skipped when constructing JS stack traces. In order to
show these calls on traces, we introduce a new builtin exit frame type.

Builtin exit frames contain target and new.target on the stack and are
not skipped during stack trace construction.

BUG=v8:4815
R=bmeurer@chromium.org, yangguo@chromium.org
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel;tryserver.v8:v8_linux_nosnap_dbg

Committed: https://crrev.com/3c60c6b105f39344f93a8407f41534e5e60cf19a
Review-Url: https://codereview.chromium.org/2090723005
Cr-Original-Commit-Position: refs/heads/master@{#37384}
Cr-Commit-Position: refs/heads/master@{#37416}
2016-06-30 06:58:23 +00:00
georgia.kouveli
317dc0578f [arm64] Generate adds/ands.
Perform the following transformation:

    | Before           | After               |
    |------------------+---------------------|
    | add w2, w0, w1   | adds w2, w0, w1     |
    | cmp w2, #0x0     | b.<cond'> <addr>    |
    | b.<cond> <addr>  |                     |
    |------------------+---------------------|
    | add w2, w0, w1   | adds w2, w0, w1     |
    | cmp #0x0, w2     | b.<cond'> <addr>    |
    | b.<cond> <addr>  |                     |

and the same for and instructions instead of add.  When the result of the
add/and is not used, generate cmn/tst instead. We need to take care with which
conditions we can handle and what new condition we map them to.

BUG=

Review-Url: https://codereview.chromium.org/2065243005
Cr-Commit-Position: refs/heads/master@{#37400}
2016-06-29 14:57:49 +00:00
bmeurer
5927deaaf1 Revert of [builtins] New frame type for exits to C++ builtins (patchset #5 id:80001 of https://codereview.chromium.org/2090723005/ )
Reason for revert:
Looks like this breaks on nosnap: http://build.chromium.org/p/client.v8/builders/V8%20Linux%20-%20nosnap%20-%20debug/builds/7626

Original issue's description:
> [builtins] New frame type for exits to C++ builtins
>
> Prior to this commit, calls to C++ builtins created standard exit
> frames, which are skipped when constructing JS stack traces. In order to
> show these calls on traces, we introduce a new builtin exit frame type.
>
> Builtin exit frames contain target and new.target on the stack and are
> not skipped during stack trace construction.
>
> BUG=v8:4815
> R=bmeurer@chromium.org, yangguo@chromium.org
> CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
>
> Committed: https://crrev.com/3c60c6b105f39344f93a8407f41534e5e60cf19a
> Cr-Commit-Position: refs/heads/master@{#37384}

TBR=yangguo@chromium.org,jgruber@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:4815

Review-Url: https://codereview.chromium.org/2106113002
Cr-Commit-Position: refs/heads/master@{#37394}
2016-06-29 12:39:36 +00:00
bmeurer
e0c87cfce6 [turbofan] Don't eagerly introduce machine operators in JSTypedLowering.
This functionality is duplicated with the same functionality in
SimplifiedLowering, which is kinda premature and doesn't seem to
be useful.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2103323003
Cr-Commit-Position: refs/heads/master@{#37386}
2016-06-29 11:13:31 +00:00
jgruber
3c60c6b105 [builtins] New frame type for exits to C++ builtins
Prior to this commit, calls to C++ builtins created standard exit
frames, which are skipped when constructing JS stack traces. In order to
show these calls on traces, we introduce a new builtin exit frame type.

Builtin exit frames contain target and new.target on the stack and are
not skipped during stack trace construction.

BUG=v8:4815
R=bmeurer@chromium.org, yangguo@chromium.org
CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel

Review-Url: https://codereview.chromium.org/2090723005
Cr-Commit-Position: refs/heads/master@{#37384}
2016-06-29 11:10:27 +00:00
bmeurer
6f920d7d59 [turbofan] Disallow typing for change/checked operators.
There are no useful typing rules for Change and Checked operators, so we
better make sure we don't run them through the Typer at all.

R=jarin@chromium.org

Review-Url: https://codereview.chromium.org/2107783004
Cr-Commit-Position: refs/heads/master@{#37382}
2016-06-29 10:32:19 +00:00
bmeurer
e607e12ea0 [turbofan] Introduce Float64Pow and NumberPow operators.
Introduce a new machine operator Float64Pow that for now is backed by
the existing MathPowStub to start the unification of Math.pow, and at
the same time address the main performance issue that TurboFan still has
with the imaging-darkroom benchmark in Kraken.

Also migrate the Math.pow builtin itself to a TurboFan builtin and
remove a few hundred lines of hand-written platform code for special
handling of the fullcodegen Math.pow version.

BUG=v8:3599,v8:5086,v8:5157

Review-Url: https://codereview.chromium.org/2103733003
Cr-Commit-Position: refs/heads/master@{#37323}
2016-06-28 10:26:10 +00:00
bbudge
257336d26a [RegisterConfiguration] Streamline access to arch defaults, simplify Registers.
Replaces ArchDefault method with Crankshaft and Turbofan getters.
Eliminates IsAllocated method on Register, FloatRegister, DoubleRegister.
Eliminates ToString method too.
Changes call sites to access appropriate arch default RegisterConfiguration.

LOG=N
BUG=

Review-Url: https://codereview.chromium.org/2092413002
Cr-Commit-Position: refs/heads/master@{#37297}
2016-06-27 15:31:31 +00:00
bbudge
a933b7044a [Turbofan] Add the concept of aliasing to RegisterConfiguration.
- Adds the concept of FP register aliasing to RegisterConfiguration.
- Changes RegisterAllocator to distinguish between FP representations
when allocating.
- Changes LinearScanAllocator to detect interference when FP register
aliasing is combining, as on ARM.
- Changes ARM code generation to allow all registers s0 - s31 to be
accessed.
- Adds unit tests for RegisterConfiguration, mostly to test aliasing
calculations.

LOG=N
BUG=v8:4124

Review-Url: https://codereview.chromium.org/2086653003
Cr-Commit-Position: refs/heads/master@{#37251}
2016-06-24 12:45:05 +00:00
balazs.kilvady
5cda2db7d3 Fix '[tests] Don't test moves between different reps in test-gap-resolver.cc'
Port fc59eb8a7a

Original commit message:
Moves between operands with different representations shouldn't happen,
so don't test them. This makes it easier to modify canonicalization to
differentiate between floating point types, which is needed to support
floating point register aliasing for ARM and MIPS.

This change also expands tests to include explicit FP moves (both register and stack slot).

LOG=N
BUG=v8:4124
BUG=chromium:622619

Review-Url: https://codereview.chromium.org/2090993002
Cr-Commit-Position: refs/heads/master@{#37241}
2016-06-24 08:26:36 +00:00
bmeurer
488d6e5f84 [turbofan] x - y < 0 is not equivalent to x < y.
We cannot change x - y < 0 to x < y, because it would only be safe if
x - y cannot overflow, which we don't know in general.

R=jarin@chromium.org
BUG=v8:5129

Review-Url: https://codereview.chromium.org/2090493002
Cr-Commit-Position: refs/heads/master@{#37164}
2016-06-22 05:38:36 +00:00
bmeurer
c87168bc8c [builtins] Introduce proper Float64Tan operator.
Import base::ieee754::tan() from fdlibm and introduce Float64Tan TurboFan
operator based on that, similar to what we do for Float64Cos and Float64Sin.
Rewrite Math.tan() as TurboFan builtin and use those operators to also
inline Math.tan() into optimized TurboFan functions.

Drive-by-fix: Kill the %_ConstructDouble intrinsics, and provide only
the %ConstructDouble runtime entry for writing tests.

BUG=v8:5086,v8:5126
R=yangguo@chromium.org

Review-Url: https://codereview.chromium.org/2083453002
Cr-Commit-Position: refs/heads/master@{#37087}
2016-06-20 05:51:52 +00:00
bmeurer
c781e83194 [builtins] Introduce proper Float64Cos and Float64Sin.
Import base::ieee754::cos() and base::ieee754::sin() from fdlibm and
introduce Float64Cos and Float64Sin TurboFan operator based on that,
similar to what we do for Float64Log. Rewrite Math.cos() and Math.sin()
as TurboFan builtins and use those operators to also inline Math.cos()
and Math.sin() into optimized TurboFan functions.

CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
R=mvstanton@chromium.org
BUG=v8:5086,v8:5118

Review-Url: https://codereview.chromium.org/2073123002
Cr-Commit-Position: refs/heads/master@{#37072}
2016-06-17 15:24:15 +00:00
ishell
6955c55321 [turbofan] CodeAssembler is now able to generate calls of JavaScript objects.
... and a drive-by-fix of a comment generation in CodeAssembler.

Review-Url: https://codereview.chromium.org/2076953002
Cr-Commit-Position: refs/heads/master@{#37070}
2016-06-17 13:51:12 +00:00
ishell
b98e3949a3 [test] Move CodeAssembler tests to a separate file.
Review-Url: https://codereview.chromium.org/2072813003
Cr-Commit-Position: refs/heads/master@{#37069}
2016-06-17 13:23:14 +00:00
mvstanton
4d4eb61111 [builtins] Unify Atanh, Cbrt and Expm1 as exports from flibm.
BUG=v8:5103

Review-Url: https://codereview.chromium.org/2068743002
Cr-Commit-Position: refs/heads/master@{#37058}
2016-06-17 09:14:38 +00:00
bmeurer
d5f2ac5e33 [builtins] Introduce proper Float64Exp operator.
Import base::ieee754::exp() from FreeBSD msun and introduce a Float64Exp
TurboFan operator based on that, similar to what we do for Float64Log.
Rewrite Math.exp() as TurboFan builtin and use that operator to also
inline Math.exp() into optimized TurboFan functions.

CQ_INCLUDE_TRYBOTS=tryserver.chromium.linux:linux_chromium_rel_ng;tryserver.blink:linux_blink_rel
BUG=v8:3266,v8:3468,v8:3493,v8:5086,v8:5108,chromium:620786
R=mvstanton@chromium.org

Committed: https://crrev.com/93e26314afc9da9b5b8bd998688262444ed73260
Review-Url: https://codereview.chromium.org/2077533002
Cr-Original-Commit-Position: refs/heads/master@{#37037}
Cr-Commit-Position: refs/heads/master@{#37047}
2016-06-17 05:20:59 +00:00
machenbach
789b0ad77a Revert of [builtins] Introduce proper Float64Exp operator. (patchset #5 id:80001 of https://codereview.chromium.org/2077533002/ )
Reason for revert:
[Sheriff] Leads to some different rounding as it seems in some audio layout tests. Please rebase upstream first if intended:
https://build.chromium.org/p/client.v8.fyi/builders/V8-Blink%20Linux%2064/builds/7508

Original issue's description:
> [builtins] Introduce proper Float64Exp operator.
>
> Import base::ieee754::exp() from FreeBSD msun and introduce a Float64Exp
> TurboFan operator based on that, similar to what we do for Float64Log.
> Rewrite Math.exp() as TurboFan builtin and use that operator to also
> inline Math.exp() into optimized TurboFan functions.
>
> BUG=v8:3266,v8:3468,v8:3493,v8:5086,v8:5108
> R=mvstanton@chromium.org
>
> Committed: https://crrev.com/93e26314afc9da9b5b8bd998688262444ed73260
> Cr-Commit-Position: refs/heads/master@{#37037}

TBR=mvstanton@chromium.org,ahaas@chromium.org,bmeurer@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:3266,v8:3468,v8:3493,v8:5086,v8:5108

Review-Url: https://codereview.chromium.org/2070813002
Cr-Commit-Position: refs/heads/master@{#37039}
2016-06-16 12:49:53 +00:00
bmeurer
93e26314af [builtins] Introduce proper Float64Exp operator.
Import base::ieee754::exp() from FreeBSD msun and introduce a Float64Exp
TurboFan operator based on that, similar to what we do for Float64Log.
Rewrite Math.exp() as TurboFan builtin and use that operator to also
inline Math.exp() into optimized TurboFan functions.

BUG=v8:3266,v8:3468,v8:3493,v8:5086,v8:5108
R=mvstanton@chromium.org

Review-Url: https://codereview.chromium.org/2077533002
Cr-Commit-Position: refs/heads/master@{#37037}
2016-06-16 12:10:27 +00:00
mvstanton
d9bf520a22 [builtins] Introduce proper Float64Log2 and Float64Log10 operators.
BUG=v8:5095

Review-Url: https://codereview.chromium.org/2063693002
Cr-Commit-Position: refs/heads/master@{#37035}
2016-06-16 11:25:06 +00:00
jarin
a49c4b0a47 [turbofan] Type feedback for numeric comparisons.
Review-Url: https://codereview.chromium.org/2035383003
Cr-Commit-Position: refs/heads/master@{#37024}
2016-06-16 06:37:31 +00:00
bbudge
fc59eb8a7a [tests] Don't test moves between different reps in test-gap-resolver.cc
Moves between operands with different representations shouldn't happen,
so don't test them. This makes it easier to modify canonicalization to
differentiate between floating point types, which is needed to support
floating point register aliasing for ARM and MIPS.

This change also expands tests to include explicit FP moves (both register and stack slot).

LOG=N
BUG=v8:4124

Review-Url: https://codereview.chromium.org/2060273003
Cr-Commit-Position: refs/heads/master@{#36963}
2016-06-14 12:27:51 +00:00
cbruni
dc2e3069e7 Reland of place all remaining Oddball checks with new function (patchset #1 id:1 of https://codereview.chromium.org/2060213002/ )
Reason for revert:
Cannot reproduce gc-stress failures locally.

Original issue's description:
> Revert of Replace all remaining Oddball checks with new function (patchset #10 id:180001 of https://codereview.chromium.org/2043183003/ )
>
> Reason for revert:
> failing tests
>
> Original issue's description:
> > Replace all remaining Oddball checks with new function
> >
> > This CL removes the IsUndefined() and Co. methods from Object and HeapObject.
> > The new method all take the isolate as parameter.
> >
> > BUG=
> >
> > Committed: https://crrev.com/ccefb3ae5fe967288d568013fb04e8761eafebc5
> > Cr-Commit-Position: refs/heads/master@{#36921}
>
> TBR=mstarzinger@chromium.org,verwaest@chromium.org,yangguo@chromium.org,ahaas@chromium.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=
>
> Committed: https://crrev.com/33b8bc24a12fb062100c0be84456faeb0b9fa5d1
> Cr-Commit-Position: refs/heads/master@{#36923}

TBR=mstarzinger@chromium.org,verwaest@chromium.org,yangguo@chromium.org,ahaas@chromium.org
BUG=

Review-Url: https://codereview.chromium.org/2059173002
Cr-Commit-Position: refs/heads/master@{#36957}
2016-06-14 10:09:38 +00:00
cbruni
33b8bc24a1 Revert of Replace all remaining Oddball checks with new function (patchset #10 id:180001 of https://codereview.chromium.org/2043183003/ )
Reason for revert:
failing tests

Original issue's description:
> Replace all remaining Oddball checks with new function
>
> This CL removes the IsUndefined() and Co. methods from Object and HeapObject.
> The new method all take the isolate as parameter.
>
> BUG=
>
> Committed: https://crrev.com/ccefb3ae5fe967288d568013fb04e8761eafebc5
> Cr-Commit-Position: refs/heads/master@{#36921}

TBR=mstarzinger@chromium.org,verwaest@chromium.org,yangguo@chromium.org,ahaas@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

Review-Url: https://codereview.chromium.org/2060213002
Cr-Commit-Position: refs/heads/master@{#36923}
2016-06-13 11:40:35 +00:00
cbruni
ccefb3ae5f Replace all remaining Oddball checks with new function
This CL removes the IsUndefined() and Co. methods from Object and HeapObject.
The new method all take the isolate as parameter.

BUG=

Review-Url: https://codereview.chromium.org/2043183003
Cr-Commit-Position: refs/heads/master@{#36921}
2016-06-13 10:21:02 +00:00
bmeurer
89d8c57b9c [builtins] Introduce proper Float64Atan and Float64Atan2 operators.
Import base::ieee754::atan() and base::ieee754::atan2() from fdlibm and
introduce Float64Atan and Float64Atan2 TurboFan operators based on those,
similar to what we already did for Float64Log and Float64Log1p. Rewrite
Math.atan() and Math.atan2() as TurboFan builtin and use the operators
to also inline Math.atan() and Math.atan2() into optimized TurboFan functions.

R=yangguo@chromium.org
BUG=v8:5086,v8:5095

Review-Url: https://codereview.chromium.org/2065503002
Cr-Commit-Position: refs/heads/master@{#36916}
2016-06-13 07:08:17 +00:00
bmeurer
7ceed92ac0 [builtins] Introduce proper Float64Log1p operator.
Import base::ieee754::log1p() from fdlibm and introduce a Float64Log1p
TurboFan operator based on that, similar to what we do for Float64Log.
Rewrite Math.log1p() as TurboFan builtin and use that operator to also
inline Math.log1p() into optimized TurboFan functions.

Also unify the handling of the special IEEE 754 functions somewhat in
the TurboFan backends. At some point we can hopefully express this
completely in the InstructionSelector (once we have an idea what to do
with the ST(0) return issue on IA-32/X87).

Drive-by-fix: Add some more test coverage for the log function.

R=yangguo@chromium.org
BUG=v8:5086,v8:5092

Review-Url: https://codereview.chromium.org/2060743002
Cr-Commit-Position: refs/heads/master@{#36914}
2016-06-13 05:48:02 +00:00
jarin
2890137bdc [turbofan] Introduce PlainPrimitiveToNumber.
This should solve the problem with missing checkpoints after JSToNumber
(PlainPrimitiveToNumber is marked no-write, so the frame-state
propagation should see through it.)

Unfortunately, this also duplicates the word32- and float64-truncation
magic that we have for JSToNumber in "simplified lowering".

Review-Url: https://codereview.chromium.org/2059653002
Cr-Commit-Position: refs/heads/master@{#36881}
2016-06-10 07:45:23 +00:00
bmeurer
d0c7775d7c [builtins] Introduce proper base::ieee754::log.
This switches Math.log to use an fdlibm based version of log, imported
as base::ieee754::log, and use that consistently everywhere, i.e. change
the Float64Log TurboFan operators on Intel to use the C++ implementation
as well (same for Crankshaft).

R=yangguo@chromium.org
BUG=v8:5065,v8:5086

Review-Url: https://codereview.chromium.org/2053893003
Cr-Commit-Position: refs/heads/master@{#36880}
2016-06-10 05:54:12 +00:00
jarin
406146ff5c [stubs] ToNumberStub --> ToNumber builtin.
This makes sure we do not compile ToNumber stub on demand. This makes it
easier to use during concurrent compilation.

Review-Url: https://codereview.chromium.org/2051113002
Cr-Commit-Position: refs/heads/master@{#36870}
2016-06-09 15:38:21 +00:00
neis
6ddd8314a5 [compiler] Deal with some old TODOs in the typer.
This is mostly about DCHECKs. Enabling some requires a few
changes to tests that were not careful about types.

BUG=

Review-Url: https://codereview.chromium.org/2033703002
Cr-Commit-Position: refs/heads/master@{#36734}
2016-06-06 09:18:30 +00:00
bmeurer
f2da19fe39 [builtins] Migrate Math.log to TurboFan.
Introduce a dedicated Float64Log machine operator, that is either
implemented by a direct C call or by platform specific code, i.e.
using the FPU on x64 and ia32.

This operator is used to implement Math.log as a proper TurboFan
builtin on top of the CodeStubAssembler.

Also introduce a NumberLog simplified operator on top of Float64Log
and use that for the fast inline path of Math.log inside TurboFan
optimized code.

BUG=v8:5065

Review-Url: https://codereview.chromium.org/2029413005
Cr-Commit-Position: refs/heads/master@{#36703}
2016-06-03 09:48:25 +00:00
ishell
3c4f903e56 [stubs] Extend HasProperty stub with dictionary-mode, string wrapper and double-elements objects support.
This CL also replaces some Branch() usages with GotoIf/GotoUnless.

(This is a reland after fixing issues that prevented this CL from landing in other CLs).

BUG=v8:2743
LOG=Y

Committed: https://crrev.com/24066b6df4259b302edfa1db884c479008776a7e
Cr-Commit-Position: refs/heads/master@{#36657}

Review-Url: https://codereview.chromium.org/1995453002
Cr-Commit-Position: refs/heads/master@{#36686}
2016-06-02 15:02:58 +00:00
ishell
5a5c115efd Move test/cctest/compiler/test-code-stub-assembler.cc to test/cctest directory.
... since CodeStubAssembler does not belong to v8::internal::compiler namespace anymore.

Review-Url: https://codereview.chromium.org/2035533003
Cr-Commit-Position: refs/heads/master@{#36683}
2016-06-02 14:10:00 +00:00
jarin
216bcf9fb3 [turbofan] Initial version of number type feedback.
This introduces optimized number operations based on type feedback.

Summary of changes:

1. Typed lowering produces SpeculativeNumberAdd/Subtract for JSAdd/Subtract if
   there is suitable feedback. The speculative nodes are connected to both the
   effect chain and the control chain and they retain the eager frame state.

2. Simplified lowering now executes in three phases:
  a. Propagation phase computes truncations by traversing the graph from uses to
     definitions until checkpoint is reached. It also records type-check decisions
     for later typing phase, and computes representation.
  b. The typing phase computes more precise types base on the speculative types (and recomputes
     representation for affected nodes).
  c. The lowering phase performs lowering and inserts representation changes and/or checks.

3. Effect-control linearization lowers the checks to machine graphs.

Notes:

- SimplifiedLowering will be refactored to have handling of each operation one place and
  with clearer input/output protocol for each sub-phase. I would prefer to do this once
  we have more operations implemented, and the pattern is clearer.

- The check operations (Checked<A>To<B>) should have some flags that would affect
  the kind of truncations that they can handle. E.g., if we know that a node produces
  a number, we can omit the oddball check in the CheckedTaggedToFloat64 lowering.

- In future, we want the typer to reuse the logic from OperationTyper.

BUG=v8:4583
LOG=n

Review-Url: https://codereview.chromium.org/1921563002
Cr-Commit-Position: refs/heads/master@{#36674}
2016-06-02 09:23:13 +00:00
ishell
9b4f836a2d Revert of Extend HasProperty stub with dictionary-mode and double-elements objects support. (patchset #8 id:280001 of https://codereview.chromium.org/1995453002/ )
Reason for revert:
There are crashes on Win32 and Win64 bots.

Original issue's description:
> Extend HasProperty stub with dictionary-mode, string wrapper and double-elements objects support.
>
> This CL also replaces some Branch() usages with GotoIf/GotoUnless.
>
> BUG=v8:2743
> LOG=Y
>
> Committed: https://crrev.com/24066b6df4259b302edfa1db884c479008776a7e
> Cr-Commit-Position: refs/heads/master@{#36657}

TBR=verwaest@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=v8:2743

Review-Url: https://codereview.chromium.org/2028333002
Cr-Commit-Position: refs/heads/master@{#36659}
2016-06-01 21:10:13 +00:00
ishell
24066b6df4 Extend HasProperty stub with dictionary-mode, string wrapper and double-elements objects support.
This CL also replaces some Branch() usages with GotoIf/GotoUnless.

BUG=v8:2743
LOG=Y

Review-Url: https://codereview.chromium.org/1995453002
Cr-Commit-Position: refs/heads/master@{#36657}
2016-06-01 20:00:20 +00:00
bbudge
817b59c8ad Turbofan: Modify WASM linkage to store floats using only 4 bytes.
Adds instructions for ARM to push floats.

LOG=N
BUG=v8:4124

Review-Url: https://codereview.chromium.org/2024443002
Cr-Commit-Position: refs/heads/master@{#36654}
2016-06-01 17:43:45 +00:00
jarin
5e96f47bc8 [turbofan] Distinguish between change- and truncate-tagged-to-float64.
This prevents the compiler from optimizing
  f64-to-tagged(tagged-to-f64(x)) ==> x
for non-number x (such as undefined).

Review-Url: https://codereview.chromium.org/2027593002
Cr-Commit-Position: refs/heads/master@{#36613}
2016-05-31 12:01:40 +00:00
georgia.kouveli
612bad1d22 [arm] [arm64] Add optional operators Float32Neg and Float64Neg.
Adding optional operators for FNeg for WebAssembly, as the current implementation was significantly suboptimal for ARM.

Review-Url: https://codereview.chromium.org/2011303002
Cr-Commit-Position: refs/heads/master@{#36544}
2016-05-27 11:22:07 +00:00
franzih
8c31bd81f2 [builtins] Rewrite uri.js as builtin functions.
Rewrite decodeURI and decodeURIComponent as builtin functions
and install them in the bootstrapper.

Delete unused runtime functions:
 - TruncateString
 - NewString
 - OneByteSeqStringGetChar
 - OneByteSeqStringSetChar
 - TwoByteSeqStringGetChar
 - TwoByteSeqStringSetChar

Add regression test for decoding large strings. Clusterfuzz detected
a problem with %TruncateString, see
https://bugs.chromium.org/p/chromium/issues/detail?id=612109#c6
This is automatically fixed by this rewrite because %TruncateString
is deleted anyways.

Crude benchmark on 585 decodeURI and decodeURIComponent tests
averaged over five runs:

* builtin functions
real	0m9.69s
user	2m39.8816s
sys    	0m12.6398s

* JS functions calling into the runtime e.g., for %TruncateString
real	0m11.0598s
user	3m6.7026s
sys	0m13.5756s

By running:
$  time tools/run-tests.py   --arch=x64  --mode=Release --buildbot
  test262/built-ins/decodeURI* mjsunit/uri
>>> Running tests for x64.Release

BUG=v8:4912, chromium:612109
R=yangguo@chromium.org, bmeurer@chromium.org

Review-Url: https://codereview.chromium.org/1994733003
Cr-Commit-Position: refs/heads/master@{#36543}
2016-05-27 09:57:07 +00:00
bmeurer
b2fd2ded16 [runtime] Remove the obsolete %_StringCharAt intrinsic.
This intrinsic (and the matching runtime entry) are no longer used by
now and can thereby be removed.

BUG=v8:5049

Review-Url: https://codereview.chromium.org/2016993003
Cr-Commit-Position: refs/heads/master@{#36540}
2016-05-27 08:52:32 +00:00