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[vm] Fix debug/arm64c build
On arm64 Address can assume certain load/store size depending on the value (alignment) of the offset. This may cause assertion failure "runtime/vm/compiler/assembler/assembler_arm64.h: 2750: error: expected: a.log2sz_ == -1 || a.log2sz_ == size". This change fixes build on arm64c in debug mode by using an unaligned offset. This is a follow-up to https://dart-review.googlesource.com/c/sdk/+/259920. TEST=Build on the vm-ffi-android-debug-arm64c bot. Issue: https://github.com/dart-lang/sdk/issues/49719 Change-Id: I2fef8c8b397e85b9092244ae701a5f7b24b8f6eb Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/260062 Auto-Submit: Alexander Markov <alexmarkov@google.com> Reviewed-by: Ryan Macnak <rmacnak@google.com> Commit-Queue: Ryan Macnak <rmacnak@google.com>
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@ -1139,8 +1139,7 @@ void StubCodeCompiler::GenerateAllocateRecordStub(Assembler* assembler) {
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#endif
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Label loop, done;
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__ AddImmediate(field_reg, result_reg,
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target::Record::field_offset(0) - kHeapObjectTag);
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__ AddImmediate(field_reg, result_reg, target::Record::field_offset(0));
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__ CompareRegisters(field_reg, new_top_reg);
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__ BranchIf(UNSIGNED_GREATER_EQUAL, &done, Assembler::kNearJump);
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@ -1148,7 +1147,7 @@ void StubCodeCompiler::GenerateAllocateRecordStub(Assembler* assembler) {
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for (intptr_t offset = 0; offset < target::kObjectAlignment;
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offset += target::kCompressedWordSize) {
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__ StoreCompressedIntoObjectNoBarrier(
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result_reg, Address(field_reg, offset), null_reg);
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result_reg, FieldAddress(field_reg, offset), null_reg);
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}
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// Safe to only check every kObjectAlignment bytes instead of each word.
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ASSERT(kAllocationRedZoneSize >= target::kObjectAlignment);
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