IRGen: always execute the coroutine lowering pass

Do not gate the coroutine extension points on the LLVM passes. Without
running this pass, the generated IR cannot be used by the LLVM tooling.
This allows generating the LLVM IR to debug issues in the LLVM backend.

I encountered this when trying to isolate a debug info generation bug
which seems to be caused by the SRoA pass in LLVM. By allowing to emit
the LLVM IR without the LLVM optimizations, it is possible to isolate
the LLVM pass operation via `opt` from LLVM.

Author: compnerd

lib/IRGen/IRGen.cpp

@@ -221,7 +221,7 @@ void swift::performLLVMOptimizations(const IRGenOptions &Opts,
                            addSwiftContractPass);
   }
 
-  if (RunSwiftSpecificLLVMOptzns)
+  if (!Opts.DisableSwiftSpecificLLVMOptzns)
     addCoroutinePassesToExtensionPoints(PMBuilder);
 
   if (Opts.Sanitizers & SanitizerKind::Address) {

test/IRGen/modifyaccessor.swift

@@ -1,4 +1,4 @@
-// RUN: %target-swift-frontend -emit-ir -disable-llvm-optzns -primary-file %s | %FileCheck %s
+// RUN: %target-swift-frontend -emit-ir -disable-llvm-optzns -disable-swift-specific-llvm-optzns -primary-file %s | %FileCheck %s
 extension Dictionary {
   subscript(alternate key: Key) -> Value? {
     get {

test/IRGen/yield_once.sil

@@ -1,4 +1,4 @@
-// RUN: %target-swift-frontend -emit-ir -disable-llvm-optzns %s | %FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-%target-ptrsize --check-prefix=CHECK-%target-ptrsize-%target-ptrauth
+// RUN: %target-swift-frontend -emit-ir -disable-llvm-optzns -disable-swift-specific-llvm-optzns %s | %FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-%target-ptrsize --check-prefix=CHECK-%target-ptrsize-%target-ptrauth
 
 import Builtin
 

test/IRGen/yield_once_big.sil

@@ -1,4 +1,4 @@
-// RUN: %target-swift-frontend -emit-ir -disable-llvm-optzns %s | %FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-%target-ptrsize --check-prefix=CHECK-%target-ptrsize-%target-ptrauth -DINT=i%target-ptrsize
+// RUN: %target-swift-frontend -emit-ir -disable-llvm-optzns -disable-swift-specific-llvm-optzns %s | %FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-%target-ptrsize --check-prefix=CHECK-%target-ptrsize-%target-ptrauth -DINT=i%target-ptrsize
 
 import Builtin
 import Swift

test/IRGen/yield_once_biggish.sil

@@ -1,4 +1,4 @@
-// RUN: %target-swift-frontend -emit-ir -disable-llvm-optzns %s | %FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-%target-ptrsize --check-prefix=CHECK-%target-ptrsize-%target-ptrauth -DINT=i%target-ptrsize
+// RUN: %target-swift-frontend -emit-ir -disable-llvm-optzns -disable-swift-specific-llvm-optzns %s | %FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-%target-ptrsize --check-prefix=CHECK-%target-ptrsize-%target-ptrauth -DINT=i%target-ptrsize
 
 // i386 uses a scalar result count of 3 instead of 4, so this test would need
 // to be substantially different to test the functionality there.  It's easier

test/IRGen/yield_once_indirect.sil

@@ -1,4 +1,4 @@
-// RUN: %target-swift-frontend -emit-ir -disable-llvm-optzns %s | %FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-%target-ptrsize --check-prefix=CHECK-%target-ptrsize-%target-ptrauth -DINT=i%target-ptrsize
+// RUN: %target-swift-frontend -emit-ir -disable-llvm-optzns -disable-swift-specific-llvm-optzns %s | %FileCheck %s --check-prefix=CHECK --check-prefix=CHECK-%target-ptrsize --check-prefix=CHECK-%target-ptrsize-%target-ptrauth -DINT=i%target-ptrsize
 
 import Builtin
 import Swift