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5661b7eb80
This extends any frame record created in the function to include that parameter, passed in X22. The new record looks like [X22, FP, LR] in memory, and FP is stored with 0b0001 in bits 63:60 (CodeGen assumes they are 0b0000 in normal operation). The effect of this is that tools walking the stack should expect to see one of three values there: * 0b0000 => a normal, non-extended record with just [FP, LR] * 0b0001 => the extended record [X22, FP, LR] * 0b1111 => kernel space, and a non-extended record. All other values are currently reserved. If compiling for arm64e this context pointer is address-discriminated with the discriminator 0xc31a and the DB (process-specific) key. There is also an "i8** @llvm.swift.async.context.addr()" intrinsic providing front-ends access to this slot (and forcing its creation initialized to nullptr if necessary). |
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| .. | ||
| CallLowering.cpp | ||
| CMakeLists.txt | ||
| Combiner.cpp | ||
| CombinerHelper.cpp | ||
| CSEInfo.cpp | ||
| CSEMIRBuilder.cpp | ||
| GISelChangeObserver.cpp | ||
| GISelKnownBits.cpp | ||
| GlobalISel.cpp | ||
| InlineAsmLowering.cpp | ||
| InstructionSelect.cpp | ||
| InstructionSelector.cpp | ||
| IRTranslator.cpp | ||
| LegalityPredicates.cpp | ||
| LegalizeMutations.cpp | ||
| Legalizer.cpp | ||
| LegalizerHelper.cpp | ||
| LegalizerInfo.cpp | ||
| Localizer.cpp | ||
| LostDebugLocObserver.cpp | ||
| MachineIRBuilder.cpp | ||
| RegBankSelect.cpp | ||
| RegisterBank.cpp | ||
| RegisterBankInfo.cpp | ||
| Utils.cpp | ||