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Unified Diff: src/arm/lithium-codegen-arm.cc

Issue 295913009: Allow specifying base offset when constructing Keyed hydrogen instructions (Closed) Base URL: https://v8.googlecode.com/svn/branches/bleeding_edge
Patch Set: Remove more unnecessary code Created 6 years, 7 months ago
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Index: src/arm/lithium-codegen-arm.cc
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index 623a9dca452d8195ab26de7d5060f1a905978282..d2e665e58cbb8a22218235ce1ac45594b225055b 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -3168,17 +3168,13 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
int element_size_shift = ElementsKindToShiftSize(elements_kind);
int shift_size = (instr->hydrogen()->key()->representation().IsSmi())
? (element_size_shift - kSmiTagSize) : element_size_shift;
- int additional_offset = IsFixedTypedArrayElementsKind(elements_kind)
- ? FixedTypedArrayBase::kDataOffset - kHeapObjectTag
- : 0;
-
+ int base_offset = instr->base_offset();
if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
elements_kind == FLOAT32_ELEMENTS ||
elements_kind == EXTERNAL_FLOAT64_ELEMENTS ||
elements_kind == FLOAT64_ELEMENTS) {
- int base_offset =
- (instr->additional_index() << element_size_shift) + additional_offset;
+ int base_offset = instr->base_offset();
DwVfpRegister result = ToDoubleRegister(instr->result());
Operand operand = key_is_constant
? Operand(constant_key << element_size_shift)
@@ -3188,15 +3184,14 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
elements_kind == FLOAT32_ELEMENTS) {
__ vldr(double_scratch0().low(), scratch0(), base_offset);
__ vcvt_f64_f32(result, double_scratch0().low());
- } else { // loading doubles, not floats.
+ } else { // i.e. elements_kind == EXTERNAL_DOUBLE_ELEMENTS
__ vldr(result, scratch0(), base_offset);
}
} else {
Register result = ToRegister(instr->result());
MemOperand mem_operand = PrepareKeyedOperand(
key, external_pointer, key_is_constant, constant_key,
- element_size_shift, shift_size,
- instr->additional_index(), additional_offset);
+ element_size_shift, shift_size, base_offset);
switch (elements_kind) {
case EXTERNAL_INT8_ELEMENTS:
case INT8_ELEMENTS:
@@ -3256,15 +3251,13 @@ void LCodeGen::DoLoadKeyedFixedDoubleArray(LLoadKeyed* instr) {
int element_size_shift = ElementsKindToShiftSize(FAST_DOUBLE_ELEMENTS);
- int base_offset =
- FixedDoubleArray::kHeaderSize - kHeapObjectTag +
- (instr->additional_index() << element_size_shift);
+ int base_offset = instr->base_offset();
if (key_is_constant) {
int constant_key = ToInteger32(LConstantOperand::cast(instr->key()));
if (constant_key & 0xF0000000) {
Abort(kArrayIndexConstantValueTooBig);
}
- base_offset += constant_key << element_size_shift;
+ base_offset += constant_key * kDoubleSize;
}
__ add(scratch, elements, Operand(base_offset));
@@ -3290,12 +3283,11 @@ void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) {
Register result = ToRegister(instr->result());
Register scratch = scratch0();
Register store_base = scratch;
- int offset = 0;
+ int offset = instr->base_offset();
if (instr->key()->IsConstantOperand()) {
LConstantOperand* const_operand = LConstantOperand::cast(instr->key());
- offset = FixedArray::OffsetOfElementAt(ToInteger32(const_operand) +
- instr->additional_index());
+ offset += ToInteger32(const_operand) * kPointerSize;
store_base = elements;
} else {
Register key = ToRegister(instr->key());
@@ -3308,9 +3300,8 @@ void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) {
} else {
__ add(scratch, elements, Operand(key, LSL, kPointerSizeLog2));
}
- offset = FixedArray::OffsetOfElementAt(instr->additional_index());
}
- __ ldr(result, FieldMemOperand(store_base, offset));
+ __ ldr(result, MemOperand(store_base, offset));
// Check for the hole value.
if (instr->hydrogen()->RequiresHoleCheck()) {
@@ -3343,32 +3334,12 @@ MemOperand LCodeGen::PrepareKeyedOperand(Register key,
int constant_key,
int element_size,
int shift_size,
- int additional_index,
- int additional_offset) {
- int base_offset = (additional_index << element_size) + additional_offset;
+ int base_offset) {
if (key_is_constant) {
- return MemOperand(base,
- base_offset + (constant_key << element_size));
+ return MemOperand(base, (constant_key << element_size) + base_offset);
}
- if (additional_offset != 0) {
- __ mov(scratch0(), Operand(base_offset));
- if (shift_size >= 0) {
- __ add(scratch0(), scratch0(), Operand(key, LSL, shift_size));
- } else {
- ASSERT_EQ(-1, shift_size);
- // key can be negative, so using ASR here.
- __ add(scratch0(), scratch0(), Operand(key, ASR, 1));
- }
- return MemOperand(base, scratch0());
- }
-
- if (additional_index != 0) {
- additional_index *= 1 << (element_size - shift_size);
- __ add(scratch0(), key, Operand(additional_index));
- }
-
- if (additional_index == 0) {
+ if (base_offset == 0) {
if (shift_size >= 0) {
return MemOperand(base, key, LSL, shift_size);
} else {
@@ -3378,10 +3349,12 @@ MemOperand LCodeGen::PrepareKeyedOperand(Register key,
}
if (shift_size >= 0) {
- return MemOperand(base, scratch0(), LSL, shift_size);
+ __ add(scratch0(), base, Operand(key, LSL, shift_size));
+ return MemOperand(scratch0(), base_offset);
} else {
ASSERT_EQ(-1, shift_size);
- return MemOperand(base, scratch0(), LSR, 1);
+ __ add(scratch0(), base, Operand(key, ASR, 1));
+ return MemOperand(scratch0(), base_offset);
}
}
@@ -4211,16 +4184,12 @@ void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
int element_size_shift = ElementsKindToShiftSize(elements_kind);
int shift_size = (instr->hydrogen()->key()->representation().IsSmi())
? (element_size_shift - kSmiTagSize) : element_size_shift;
- int additional_offset = IsFixedTypedArrayElementsKind(elements_kind)
- ? FixedTypedArrayBase::kDataOffset - kHeapObjectTag
- : 0;
+ int base_offset = instr->base_offset();
if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
elements_kind == FLOAT32_ELEMENTS ||
elements_kind == EXTERNAL_FLOAT64_ELEMENTS ||
elements_kind == FLOAT64_ELEMENTS) {
- int base_offset =
- (instr->additional_index() << element_size_shift) + additional_offset;
Register address = scratch0();
DwVfpRegister value(ToDoubleRegister(instr->value()));
if (key_is_constant) {
@@ -4245,7 +4214,7 @@ void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
MemOperand mem_operand = PrepareKeyedOperand(
key, external_pointer, key_is_constant, constant_key,
element_size_shift, shift_size,
- instr->additional_index(), additional_offset);
+ base_offset);
switch (elements_kind) {
case EXTERNAL_UINT8_CLAMPED_ELEMENTS:
case EXTERNAL_INT8_ELEMENTS:
@@ -4292,6 +4261,7 @@ void LCodeGen::DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr) {
Register scratch = scratch0();
DwVfpRegister double_scratch = double_scratch0();
bool key_is_constant = instr->key()->IsConstantOperand();
+ int base_offset = instr->base_offset();
// Calculate the effective address of the slot in the array to store the
// double value.
@@ -4302,13 +4272,11 @@ void LCodeGen::DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr) {
Abort(kArrayIndexConstantValueTooBig);
}
__ add(scratch, elements,
- Operand((constant_key << element_size_shift) +
- FixedDoubleArray::kHeaderSize - kHeapObjectTag));
+ Operand((constant_key << element_size_shift) + base_offset));
} else {
int shift_size = (instr->hydrogen()->key()->representation().IsSmi())
? (element_size_shift - kSmiTagSize) : element_size_shift;
- __ add(scratch, elements,
- Operand(FixedDoubleArray::kHeaderSize - kHeapObjectTag));
+ __ add(scratch, elements, Operand(base_offset));
__ add(scratch, scratch,
Operand(ToRegister(instr->key()), LSL, shift_size));
}
@@ -4321,10 +4289,9 @@ void LCodeGen::DoStoreKeyedFixedDoubleArray(LStoreKeyed* instr) {
__ Assert(ne, kDefaultNaNModeNotSet);
}
__ VFPCanonicalizeNaN(double_scratch, value);
- __ vstr(double_scratch, scratch,
- instr->additional_index() << element_size_shift);
+ __ vstr(double_scratch, scratch, 0);
} else {
- __ vstr(value, scratch, instr->additional_index() << element_size_shift);
+ __ vstr(value, scratch, 0);
}
}
@@ -4336,14 +4303,13 @@ void LCodeGen::DoStoreKeyedFixedArray(LStoreKeyed* instr) {
: no_reg;
Register scratch = scratch0();
Register store_base = scratch;
- int offset = 0;
+ int offset = instr->base_offset();
// Do the store.
if (instr->key()->IsConstantOperand()) {
ASSERT(!instr->hydrogen()->NeedsWriteBarrier());
LConstantOperand* const_operand = LConstantOperand::cast(instr->key());
- offset = FixedArray::OffsetOfElementAt(ToInteger32(const_operand) +
- instr->additional_index());
+ offset += ToInteger32(const_operand) * kPointerSize;
store_base = elements;
} else {
// Even though the HLoadKeyed instruction forces the input
@@ -4355,16 +4321,15 @@ void LCodeGen::DoStoreKeyedFixedArray(LStoreKeyed* instr) {
} else {
__ add(scratch, elements, Operand(key, LSL, kPointerSizeLog2));
}
- offset = FixedArray::OffsetOfElementAt(instr->additional_index());
}
- __ str(value, FieldMemOperand(store_base, offset));
+ __ str(value, MemOperand(store_base, offset));
if (instr->hydrogen()->NeedsWriteBarrier()) {
SmiCheck check_needed =
instr->hydrogen()->value()->IsHeapObject()
? OMIT_SMI_CHECK : INLINE_SMI_CHECK;
// Compute address of modified element and store it into key register.
- __ add(key, store_base, Operand(offset - kHeapObjectTag));
+ __ add(key, store_base, Operand(offset));
__ RecordWrite(elements,
key,
value,
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