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-rw-r--r--compiler/optimizing/intrinsics_arm_vixl.cc76
-rw-r--r--compiler/utils/arm/assembler_arm_vixl.cc19
-rw-r--r--compiler/utils/arm/jni_macro_assembler_arm_vixl.cc10
3 files changed, 61 insertions, 44 deletions
diff --git a/compiler/optimizing/intrinsics_arm_vixl.cc b/compiler/optimizing/intrinsics_arm_vixl.cc
index 1d8ea092a4..99b8b5df74 100644
--- a/compiler/optimizing/intrinsics_arm_vixl.cc
+++ b/compiler/optimizing/intrinsics_arm_vixl.cc
@@ -1458,30 +1458,38 @@ void IntrinsicLocationsBuilderARMVIXL::VisitStringCompareTo(HInvoke* invoke) {
locations->SetOut(Location::RequiresRegister(), Location::kOutputOverlap);
}
+// Forward declaration.
+//
+// ART build system imposes a size limit (deviceFrameSizeLimit) on the stack frames generated
+// by the compiler for every C++ function, and if this function gets inlined in
+// IntrinsicCodeGeneratorARMVIXL::VisitStringCompareTo, the limit will be exceeded, resulting in a
+// build failure. That is the reason why NO_INLINE attribute is used.
+static void NO_INLINE GenerateStringCompareToLoop(ArmVIXLAssembler* assembler,
+ HInvoke* invoke,
+ vixl32::Label* end,
+ vixl32::Label* different_compression);
+
void IntrinsicCodeGeneratorARMVIXL::VisitStringCompareTo(HInvoke* invoke) {
ArmVIXLAssembler* assembler = GetAssembler();
LocationSummary* locations = invoke->GetLocations();
- vixl32::Register str = InputRegisterAt(invoke, 0);
- vixl32::Register arg = InputRegisterAt(invoke, 1);
- vixl32::Register out = OutputRegister(invoke);
+ const vixl32::Register str = InputRegisterAt(invoke, 0);
+ const vixl32::Register arg = InputRegisterAt(invoke, 1);
+ const vixl32::Register out = OutputRegister(invoke);
- vixl32::Register temp0 = RegisterFrom(locations->GetTemp(0));
- vixl32::Register temp1 = RegisterFrom(locations->GetTemp(1));
- vixl32::Register temp2 = RegisterFrom(locations->GetTemp(2));
+ const vixl32::Register temp0 = RegisterFrom(locations->GetTemp(0));
+ const vixl32::Register temp1 = RegisterFrom(locations->GetTemp(1));
+ const vixl32::Register temp2 = RegisterFrom(locations->GetTemp(2));
vixl32::Register temp3;
if (mirror::kUseStringCompression) {
temp3 = RegisterFrom(locations->GetTemp(3));
}
- vixl32::Label loop;
- vixl32::Label find_char_diff;
vixl32::Label end;
vixl32::Label different_compression;
// Get offsets of count and value fields within a string object.
const int32_t count_offset = mirror::String::CountOffset().Int32Value();
- const int32_t value_offset = mirror::String::ValueOffset().Int32Value();
// Note that the null check must have been done earlier.
DCHECK(!invoke->CanDoImplicitNullCheckOn(invoke->InputAt(0)));
@@ -1546,6 +1554,38 @@ void IntrinsicCodeGeneratorARMVIXL::VisitStringCompareTo(HInvoke* invoke) {
__ add(ne, temp0, temp0, temp0);
}
+
+ GenerateStringCompareToLoop(assembler, invoke, &end, &different_compression);
+
+ __ Bind(&end);
+
+ if (can_slow_path) {
+ __ Bind(slow_path->GetExitLabel());
+ }
+}
+
+static void GenerateStringCompareToLoop(ArmVIXLAssembler* assembler,
+ HInvoke* invoke,
+ vixl32::Label* end,
+ vixl32::Label* different_compression) {
+ LocationSummary* locations = invoke->GetLocations();
+
+ const vixl32::Register str = InputRegisterAt(invoke, 0);
+ const vixl32::Register arg = InputRegisterAt(invoke, 1);
+ const vixl32::Register out = OutputRegister(invoke);
+
+ const vixl32::Register temp0 = RegisterFrom(locations->GetTemp(0));
+ const vixl32::Register temp1 = RegisterFrom(locations->GetTemp(1));
+ const vixl32::Register temp2 = RegisterFrom(locations->GetTemp(2));
+ vixl32::Register temp3;
+ if (mirror::kUseStringCompression) {
+ temp3 = RegisterFrom(locations->GetTemp(3));
+ }
+
+ vixl32::Label loop;
+ vixl32::Label find_char_diff;
+
+ const int32_t value_offset = mirror::String::ValueOffset().Int32Value();
// Store offset of string value in preparation for comparison loop.
__ Mov(temp1, value_offset);
@@ -1577,12 +1617,12 @@ void IntrinsicCodeGeneratorARMVIXL::VisitStringCompareTo(HInvoke* invoke) {
// With string compression, we have compared 8 bytes, otherwise 4 chars.
__ Subs(temp0, temp0, (mirror::kUseStringCompression ? 8 : 4));
__ B(hi, &loop, /* far_target */ false);
- __ B(&end);
+ __ B(end);
__ Bind(&find_char_diff_2nd_cmp);
if (mirror::kUseStringCompression) {
__ Subs(temp0, temp0, 4); // 4 bytes previously compared.
- __ B(ls, &end, /* far_target */ false); // Was the second comparison fully beyond the end?
+ __ B(ls, end, /* far_target */ false); // Was the second comparison fully beyond the end?
} else {
// Without string compression, we can start treating temp0 as signed
// and rely on the signed comparison below.
@@ -1610,7 +1650,7 @@ void IntrinsicCodeGeneratorARMVIXL::VisitStringCompareTo(HInvoke* invoke) {
// the remaining string data, so just return length diff (out).
// The comparison is unsigned for string compression, otherwise signed.
__ Cmp(temp0, Operand(temp1, vixl32::LSR, (mirror::kUseStringCompression ? 3 : 4)));
- __ B((mirror::kUseStringCompression ? ls : le), &end, /* far_target */ false);
+ __ B((mirror::kUseStringCompression ? ls : le), end, /* far_target */ false);
// Extract the characters and calculate the difference.
if (mirror::kUseStringCompression) {
@@ -1637,8 +1677,8 @@ void IntrinsicCodeGeneratorARMVIXL::VisitStringCompareTo(HInvoke* invoke) {
temps.Release(temp_reg);
if (mirror::kUseStringCompression) {
- __ B(&end);
- __ Bind(&different_compression);
+ __ B(end);
+ __ Bind(different_compression);
// Comparison for different compression style.
const size_t c_char_size = DataType::Size(DataType::Type::kInt8);
@@ -1680,7 +1720,7 @@ void IntrinsicCodeGeneratorARMVIXL::VisitStringCompareTo(HInvoke* invoke) {
__ B(ne, &different_compression_diff, /* far_target */ false);
__ Subs(temp0, temp0, 2);
__ B(hi, &different_compression_loop, /* far_target */ false);
- __ B(&end);
+ __ B(end);
// Calculate the difference.
__ Bind(&different_compression_diff);
@@ -1698,12 +1738,6 @@ void IntrinsicCodeGeneratorARMVIXL::VisitStringCompareTo(HInvoke* invoke) {
__ it(cc);
__ rsb(cc, out, out, 0);
}
-
- __ Bind(&end);
-
- if (can_slow_path) {
- __ Bind(slow_path->GetExitLabel());
- }
}
// The cut off for unrolling the loop in String.equals() intrinsic for const strings.
diff --git a/compiler/utils/arm/assembler_arm_vixl.cc b/compiler/utils/arm/assembler_arm_vixl.cc
index 34849cd58d..d6b24da407 100644
--- a/compiler/utils/arm/assembler_arm_vixl.cc
+++ b/compiler/utils/arm/assembler_arm_vixl.cc
@@ -483,13 +483,9 @@ void ArmVIXLMacroAssembler::CompareAndBranchIfNonZero(vixl32::Register rn,
void ArmVIXLMacroAssembler::B(vixl32::Label* label) {
if (!label->IsBound()) {
- // Try to use 16-bit T2 encoding of B instruction.
+ // Try to use a 16-bit encoding of the B instruction.
DCHECK(OutsideITBlock());
- ExactAssemblyScope guard(this,
- k16BitT32InstructionSizeInBytes,
- CodeBufferCheckScope::kMaximumSize);
- b(al, Narrow, label);
- AddBranchLabel(label);
+ BPreferNear(label);
return;
}
MacroAssembler::B(label);
@@ -497,18 +493,11 @@ void ArmVIXLMacroAssembler::B(vixl32::Label* label) {
void ArmVIXLMacroAssembler::B(vixl32::Condition cond, vixl32::Label* label, bool is_far_target) {
if (!label->IsBound() && !is_far_target) {
- // Try to use 16-bit T2 encoding of B instruction.
+ // Try to use a 16-bit encoding of the B instruction.
DCHECK(OutsideITBlock());
- ExactAssemblyScope guard(this,
- k16BitT32InstructionSizeInBytes,
- CodeBufferCheckScope::kMaximumSize);
- b(cond, Narrow, label);
- AddBranchLabel(label);
+ BPreferNear(cond, label);
return;
}
- // To further reduce the Bcc encoding size and use 16-bit T1 encoding,
- // we can provide a hint to this function: i.e. far_target=false.
- // By default this function uses 'EncodingSizeType::Best' which generates 32-bit T3 encoding.
MacroAssembler::B(cond, label);
}
diff --git a/compiler/utils/arm/jni_macro_assembler_arm_vixl.cc b/compiler/utils/arm/jni_macro_assembler_arm_vixl.cc
index 0bae4d4b69..2b3e979606 100644
--- a/compiler/utils/arm/jni_macro_assembler_arm_vixl.cc
+++ b/compiler/utils/arm/jni_macro_assembler_arm_vixl.cc
@@ -624,14 +624,8 @@ void ArmVIXLJNIMacroAssembler::ExceptionPoll(ManagedRegister m_scratch, size_t s
Thread::ExceptionOffset<kArmPointerSize>().Int32Value());
___ Cmp(scratch.AsVIXLRegister(), 0);
- {
- ExactAssemblyScope guard(asm_.GetVIXLAssembler(),
- vixl32::kMaxInstructionSizeInBytes,
- CodeBufferCheckScope::kMaximumSize);
- vixl32::Label* label = exception_blocks_.back()->Entry();
- ___ b(ne, Narrow, label);
- ___ AddBranchLabel(label);
- }
+ vixl32::Label* label = exception_blocks_.back()->Entry();
+ ___ BPreferNear(ne, label);
// TODO: think about using CBNZ here.
}
generated by cgit v1.2.3-59-g8ed1b (git 2.39.0) at 2025-12-16 04:01:07 +0000