[IRGen] Collect metadata from like type and add type information when GEPing into raw layouts

[Azoy]

Previously, we weren't collecting the metadata from the like or count type so something generic over say a Mutex would cause a compiler crash because it wouldn't know where to find some metadata. Additionally, we weren't typing the addresses used when handling takes and destroys of raw layout causing some issues with certain like types because they would require long chains of GEPs to get the underlying value where previously we would exhaust the storage type (because it was in terms of the raw layout's storage type).

Resolves: rdar://134365415 and rdar://132358675

[Azoy]

@swift-ci please test

[Azoy]

@swift-ci please test

[kateinoigakukun]

Hi @Azoy, could you take a look at the test failure of test/IRGen/stdlib/Mutex.swift on wasm32? 🙏
Should we just make getelementptr inbounds i32, ptr [[MUTEX]], i{{32|64}} 7 into getelementptr inbounds i32, ptr [[MUTEX]], i{{32 4|||64 7}}?

https://ci.swift.org/job/oss-swift-pr-test-crosscompile-wasm-ubuntu-20_04/1491/console

--
Exit Code: 1

Command Output (stderr):
--
/home/build-user/build/buildbot_linux/wasmstdlib-linux-x86_64/test-wasi-wasm32/IRGen/stdlib/Output/Mutex.swift.tmp/Mutex.swift:36:11: error: CHECK: expected string not found in input
// CHECK: [[DEST_MUTEX_VALUE_OFFSET_PTR:%.*]] = getelementptr inbounds i32, ptr [[MUTEX]], i{{32|64}} 7
          ^
<stdin>:717:96: note: scanning from here
 call void @llvm.memcpy.p0.p0.i32(ptr align 4 %.handle, ptr align 4 %.handle3, i32 4, i1 false)
                                                                                               ^
<stdin>:717:96: note: with "MUTEX" equal to "%\"Mutex<Awaitable<Value, Failure>\\.State>\""
 call void @llvm.memcpy.p0.p0.i32(ptr align 4 %.handle, ptr align 4 %.handle3, i32 4, i1 false)
                                                                                               ^
<stdin>:720:2: note: possible intended match here
 %4 = getelementptr inbounds i8, ptr %1, i32 %3
 ^

Input file: <stdin>
Check file: /home/build-user/build/buildbot_linux/wasmstdlib-linux-x86_64/test-wasi-wasm32/IRGen/stdlib/Output/Mutex.swift.tmp/Mutex.swift

-dump-input=help explains the following input dump.

Input was:
<<<<<<
            .
            .
            .
          712:  %Failure2 = alloca ptr, align 4 
          713:  store ptr %Value, ptr %Value1, align 4 
          714:  store ptr %Failure, ptr %Failure2, align 4 
          715:  %.handle = getelementptr inbounds %T15Synchronization5MutexV, ptr %1, i32 0, i32 0 
          716:  %.handle3 = getelementptr inbounds %T15Synchronization5MutexV, ptr %0, i32 0, i32 0 
          717:  call void @llvm.memcpy.p0.p0.i32(ptr align 4 %.handle, ptr align 4 %.handle3, i32 4, i1 false) 
check:36'0                                                                                                    X error: no match found
check:36'1                                                                                                      with "MUTEX" equal to "%\"Mutex<Awaitable<Value, Failure>\\.State>\""
          718:  %2 = getelementptr inbounds i32, ptr %"Mutex<Awaitable<Value, Failure>.State>", i32 4 
check:36'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          719:  %3 = load i32, ptr %2, align 4 
check:36'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          720:  %4 = getelementptr inbounds i8, ptr %1, i32 %3 
check:36'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
check:36'2      ?                                               possible intended match
          721:  %5 = getelementptr inbounds i32, ptr %"Mutex<Awaitable<Value, Failure>.State>", i32 4 
check:36'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          722:  %6 = load i32, ptr %5, align 4 
check:36'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          723:  %7 = getelementptr inbounds i8, ptr %0, i32 %6 
check:36'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          724:  %.pendingConsumers = getelementptr inbounds %T6stdlib9AwaitableC5StateV, ptr %4, i32 0, i32 0 
check:36'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
          725:  %.pendingConsumers4 = getelementptr inbounds %T6stdlib9AwaitableC5StateV, ptr %7, i32 0, i32 0 
check:36'0     ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
            .
            .
            .
>>>>>>

--