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Revert of MIPS: Fix '[turbofan] Prevent storing signalling NaNs into holey double arrays.' (patchset #2 id:20001 of https://codereview.chromium.org/2171303002/ )

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Reason for revert:
This bug has an error in the toolchain.gypi file, the conditions clause is repeated. This has broken the DrMemory builder - see first failing chromium build https://build.chromium.org/p/chromium.memory.fyi/builders/Chromium%20Windows%20Builder%20%28DrMemory%29/builds/17857 which included a v8 roll.

For reference the errors are:
gyp: Key 'conditions' repeated at level 11 with key path 'target_defaults.conditions.6.1.target_conditions.0.1.conditions.0.1' while reading C:\b\build\slave\drm-cr\build\src\v8\gypfiles\toolchain.gypi while reading includes of C:\b\build\slave\drm-cr\build\src\v8\src\d8.gyp

gyp: Key 'conditions' repeated at level 11 with key path 'target_defaults.conditions.6.1.target_conditions.0.1.conditions.0.1' while reading C:\b\build\slave\drm-cr\build\src\v8\gypfiles\toolchain.gypi while reading includes of C:\b\build\slave\drm-cr\build\src\v8\src\v8.gyp

gyp: Key 'conditions' repeated at level 11 with key path 'target_defaults.conditions.6.1.target_conditions.0.1.conditions.0.1' while reading C:\b\build\slave\drm-cr\build\src\v8\gypfiles\toolchain.gypi while reading includes of C:\b\build\slave\drm-cr\build\src\v8\samples\samples.gyp

Original issue's description:
> MIPS: Fix '[turbofan] Prevent storing signalling NaNs into holey double arrays.'
>
> Port 6470ddadf9
>
> On MIPS different signaling NaN values must be used for hardware and simulator targets, even at snapshot generation when always simulator is used.
>
> Original commit message:
> This introduces SilenceNaN operator, which makes sure that we only
> store quiet NaNs into holey arrays. We omit the NaN silencing code
> at instruction selection time if the input is an operation that
> cannot possibly produce signalling NaNs.
>
> BUG=
>
> Committed: https://crrev.com/52f2ceb052f63324050c7a098e4398f510b54763
> Cr-Commit-Position: refs/heads/master@{#38030}

TBR=jarin@chromium.org,machenbach@google.com,akos.palfi@mattakis.com,ivica.bogosavljevic@imgtec.com,marija.antic@imgtec.com,ilija.pavlovic.imgtec@gmail.com,akos.palfi@imgtec.com,machenbach@chromium.org,balazs.kilvady@imgtec.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=

TBR=machenbach

Review-Url: https://codereview.chromium.org/2184573002
Cr-Commit-Position: refs/heads/master@{#38037}
This commit is contained in:
benwells 2016-07-25 23:31:06 -07:00 committed by Commit bot
parent 38764eac0b
commit 73a5db9d06
3 changed files with 31 additions and 44 deletions
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55
gypfiles/toolchain.gypi
View File

@ -364,49 +364,28 @@
],
'cflags': ['-march=i586'],
}], # v8_target_arch=="x87"
['v8_target_arch=="mips" or v8_target_arch=="mipsel" \
or v8_target_arch=="mips64" or v8_target_arch=="mips64el"', {
['(v8_target_arch=="mips" or v8_target_arch=="mipsel" \
or v8_target_arch=="mips64" or v8_target_arch=="mips64el") \
and v8_target_arch==target_arch', {
'target_conditions': [
['_toolset=="target"', {
# Target built with a Mips CXX compiler.
'variables': {
'ldso_path%': '<!(/bin/echo -n $LDSO_PATH)',
'ld_r_path%': '<!(/bin/echo -n $LD_R_PATH)',
},
'conditions': [
['v8_target_arch==target_arch', {
# Target built with a Mips CXX compiler.
'conditions': [
],
'variables': {
'ldso_path%': '<!(/bin/echo -n $LDSO_PATH)',
'ld_r_path%': '<!(/bin/echo -n $LD_R_PATH)',
},
'conditions': [
['ldso_path!=""', {
'ldflags': ['-Wl,--dynamic-linker=<(ldso_path)'],
}],
['ld_r_path!=""', {
'ldflags': ['-Wl,--rpath=<(ld_r_path)'],
}],
[ 'clang==1', {
'cflags': ['-integrated-as'],
}],
['OS!="mac"', {
'defines': ['_MIPS_TARGET_HW',],
}, {
'defines': ['_MIPS_TARGET_SIMULATOR',],
}],
],
}, {
'defines': ['_MIPS_TARGET_SIMULATOR',],
['ldso_path!=""', {
'ldflags': ['-Wl,--dynamic-linker=<(ldso_path)'],
}],
['ld_r_path!=""', {
'ldflags': ['-Wl,--rpath=<(ld_r_path)'],
}],
[ 'clang==1', {
'cflags': ['-integrated-as'],
}],
],
}], #'_toolset=="target"
['_toolset=="host"', {
'conditions': [
['v8_target_arch==target_arch and OS!="mac"', {
'defines': ['_MIPS_TARGET_HW',],
}, {
'defines': ['_MIPS_TARGET_SIMULATOR',],
}],
],
}], #'_toolset=="host"
}],
],
}],
['v8_target_arch=="mips"', {

14
src/compiler/mips/code-generator-mips.cc
View File

@ -1335,9 +1335,19 @@ CodeGenerator::CodeGenResult CodeGenerator::AssembleArchInstruction(
case kMipsFloat64InsertHighWord32:
__ FmoveHigh(i.OutputDoubleRegister(), i.InputRegister(1));
break;
case kMipsFloat64SilenceNaN:
__ FPUCanonicalizeNaN(i.OutputDoubleRegister(), i.InputDoubleRegister(0));
case kMipsFloat64SilenceNaN: {
FPURegister value = i.InputDoubleRegister(0);
FPURegister result = i.OutputDoubleRegister();
Register scratch0 = i.TempRegister(0);
Label is_nan, not_nan;
__ BranchF(NULL, &is_nan, eq, value, value);
__ Branch(&not_nan);
__ bind(&is_nan);
__ LoadRoot(scratch0, Heap::kNanValueRootIndex);
__ ldc1(result, FieldMemOperand(scratch0, HeapNumber::kValueOffset));
__ bind(&not_nan);
break;
}
// ... more basic instructions ...

6
src/globals.h
View File

@ -843,10 +843,8 @@ enum ScopeType {
// Use mips sNaN which is a not used qNaN in x87 port as sNaN to workaround this
// issue
// for some test cases.
#if (V8_TARGET_ARCH_MIPS && !defined(_MIPS_ARCH_MIPS32R6) && \
(!defined(USE_SIMULATOR) || !defined(_MIPS_TARGET_SIMULATOR))) || \
(V8_TARGET_ARCH_MIPS64 && !defined(_MIPS_ARCH_MIPS64R6) && \
(!defined(USE_SIMULATOR) || !defined(_MIPS_TARGET_SIMULATOR))) || \
#if (V8_TARGET_ARCH_MIPS && !defined(_MIPS_ARCH_MIPS32R6)) || \
(V8_TARGET_ARCH_MIPS64 && !defined(_MIPS_ARCH_MIPS64R6)) || \
(V8_TARGET_ARCH_X87)
const uint32_t kHoleNanUpper32 = 0xFFFF7FFF;
const uint32_t kHoleNanLower32 = 0xFFFF7FFF;