[SR-12650] Add type mangling for @noDerivative parameters

[dan-zheng]

Previous ID	SR-12650
Radar	None
Original Reporter	@dan-zheng
Type	Bug
Status	Closed
Resolution	Done

Additional Detail from JIRA

Votes	0
Component/s	Compiler
Labels	Bug, AutoDiff
Assignee	@dan-zheng
Priority	Medium

md5: 0138d915a8f5fba2978215c741cdafeb

Issue Description:

import _Differentiation
func id(_ x: Float, _ y: Float) -> Float { x }
let transformed: @differentiable (Float, @noDerivative Float) -> Float = id

IRGenDebugInfo crashes without @noDerivative parameter type mangling.

$ swiftc -g noderiv.swift
Incorrect reconstructed type for $sS3fIedgyyd_D
Original type:
(sil_function_type type=@differentiable @callee_guaranteed (Float, @noDerivative Float) -> Float
  (input=struct_type decl=Swift.(file).Float)
  (input=struct_type decl=Swift.(file).Float)
  (result=struct_type decl=Swift.(file).Float)
  (substitution_map generic_signature=<nullptr>)
  (substitution_map generic_signature=<nullptr>))
Reconstructed type:
(sil_function_type type=@differentiable @callee_guaranteed (Float, Float) -> Float
  (input=struct_type decl=Swift.(file).Float)
  (input=struct_type decl=Swift.(file).Float)
  (result=struct_type decl=Swift.(file).Float)
  (substitution_map generic_signature=<nullptr>)
  (substitution_map generic_signature=<nullptr>))
Stack dump:
...
1.  Swift version 5.3-dev (LLVM 803d1b184d, Swift 477af9f90d)
2.  While evaluating request IRGenSourceFileRequest(IR Generation for file "noderiv.swift")
0  swift                    0x00000001104c7ae8 llvm::sys::PrintStackTrace(llvm::raw_ostream&) + 40
1  swift                    0x00000001104c6a68 llvm::sys::RunSignalHandlers() + 248
2  swift                    0x00000001104c80dd SignalHandler(int) + 285
3  libsystem_platform.dylib 0x00007fff718335fd _sigtramp + 29
4  libsystem_platform.dylib 000000000000000000 _sigtramp + 18446603338611739168
5  libsystem_c.dylib        0x00007fff71709808 abort + 120
6  swift                    0x0000000110604152 (anonymous namespace)::IRGenDebugInfoImpl::getOrCreateType(swift::irgen::DebugTypeInfo) (.cold.20) + 146
7  swift                    0x000000010c24ab1e (anonymous namespace)::IRGenDebugInfoImpl::getOrCreateType(swift::irgen::DebugTypeInfo) + 3614
8  swift                    0x000000010c245437 swift::irgen::IRGenDebugInfo::emitGlobalVariableDeclaration(llvm::GlobalVariable*, llvm::StringRef, llvm::StringRef, swift::irgen::DebugTypeInfo, bool, bool, llvm::Optional<swift::SILLocation>) + 167

[dan-zheng]

Done in #31201