r323814 - Revert "CodeGen: annotate ObjC ARC functions with ABI constraints"

[Akira Hatanaka via cfe-commits]

Author: ahatanak
Date: Tue Jan 30 12:19:34 2018
New Revision: 323814

URL: http://llvm.org/viewvc/llvm-project?rev=323814&view=rev
Log:
Revert "CodeGen: annotate ObjC ARC functions with ABI constraints"

This reverts commit r294872.

Although this patch is correct, it caused the objc_autoreleaseRValue/objc_retainAutoreleasedReturnValue

Modified:
    cfe/trunk/lib/CodeGen/CGObjC.cpp
    cfe/trunk/test/CodeGenObjC/arc.m

Modified: cfe/trunk/lib/CodeGen/CGObjC.cpp
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/lib/CodeGen/CGObjC.cpp?rev=323814&r1=323813&r2=323814&view=diff
==============================================================================
--- cfe/trunk/lib/CodeGen/CGObjC.cpp (original)
+++ cfe/trunk/lib/CodeGen/CGObjC.cpp Tue Jan 30 12:19:34 2018
@@ -1815,22 +1815,6 @@ void CodeGenFunction::EmitARCIntrinsicUs
 }
 
 
-static bool IsForwarding(StringRef Name) {
-  return llvm::StringSwitch<bool>(Name)
-      .Cases("objc_autoreleaseReturnValue",             // ARCInstKind::AutoreleaseRV
-             "objc_autorelease",                        // ARCInstKind::Autorelease
-             "objc_retainAutoreleaseReturnValue",       // ARCInstKind::FusedRetainAutoreleaseRV
-             "objc_retainAutoreleasedReturnValue",      // ARCInstKind::RetainRV
-             "objc_retainAutorelease",                  // ARCInstKind::FusedRetainAutorelease
-             "objc_retainedObject",                     // ARCInstKind::NoopCast
-             "objc_retain",                             // ARCInstKind::Retain
-             "objc_unretainedObject",                   // ARCInstKind::NoopCast
-             "objc_unretainedPointer",                  // ARCInstKind::NoopCast
-             "objc_unsafeClaimAutoreleasedReturnValue", // ARCInstKind::ClaimRV
-             true)
-      .Default(false);
-}
-
 static llvm::Constant *createARCRuntimeFunction(CodeGenModule &CGM,
                                                 llvm::FunctionType *FTy,
                                                 StringRef Name) {
@@ -1848,9 +1832,6 @@ static llvm::Constant *createARCRuntimeF
       // performance.
       F->addFnAttr(llvm::Attribute::NonLazyBind);
     }
-
-    if (IsForwarding(Name))
-      F->arg_begin()->addAttr(llvm::Attribute::Returned);
   }
 
   return RTF;

Modified: cfe/trunk/test/CodeGenObjC/arc.m
URL: http://llvm.org/viewvc/llvm-project/cfe/trunk/test/CodeGenObjC/arc.m?rev=323814&r1=323813&r2=323814&view=diff
==============================================================================
--- cfe/trunk/test/CodeGenObjC/arc.m (original)
+++ cfe/trunk/test/CodeGenObjC/arc.m Tue Jan 30 12:19:34 2018
@@ -7,30 +7,30 @@
 // RUN: %clang_cc1 -fobjc-runtime=macosx-10.7.0 -triple x86_64-apple-darwin11 -Wno-objc-root-class -Wno-incompatible-pointer-types -Wno-arc-unsafe-retained-assign -emit-llvm -fblocks -fobjc-arc -fobjc-runtime-has-weak -o - %s | FileCheck -check-prefix=ARC-NATIVE %s
 
 // ARC-ALIEN: declare extern_weak void @objc_storeStrong(i8**, i8*)
-// ARC-ALIEN: declare extern_weak i8* @objc_retain(i8* returned)
-// ARC-ALIEN: declare extern_weak i8* @objc_autoreleaseReturnValue(i8* returned)
+// ARC-ALIEN: declare extern_weak i8* @objc_retain(i8*)
+// ARC-ALIEN: declare extern_weak i8* @objc_autoreleaseReturnValue(i8*)
 // ARC-ALIEN: declare i8* @objc_msgSend(i8*, i8*, ...) [[NLB:#[0-9]+]]
 // ARC-ALIEN: declare extern_weak void @objc_release(i8*)
-// ARC-ALIEN: declare extern_weak i8* @objc_retainAutoreleasedReturnValue(i8* returned)
+// ARC-ALIEN: declare extern_weak i8* @objc_retainAutoreleasedReturnValue(i8*)
 // ARC-ALIEN: declare extern_weak i8* @objc_initWeak(i8**, i8*)
 // ARC-ALIEN: declare extern_weak i8* @objc_storeWeak(i8**, i8*)
 // ARC-ALIEN: declare extern_weak i8* @objc_loadWeakRetained(i8**)
 // ARC-ALIEN: declare extern_weak void @objc_destroyWeak(i8**)
-// declare extern_weak i8* @objc_autorelease(i8*)
-// ARC-ALIEN: declare extern_weak i8* @objc_retainAutorelease(i8* returned)
+// ARC-ALIEN: declare extern_weak i8* @objc_autorelease(i8*)
+// ARC-ALIEN: declare extern_weak i8* @objc_retainAutorelease(i8*)
 
 // ARC-NATIVE: declare void @objc_storeStrong(i8**, i8*)
-// ARC-NATIVE: declare i8* @objc_retain(i8* returned) [[NLB:#[0-9]+]]
-// ARC-NATIVE: declare i8* @objc_autoreleaseReturnValue(i8* returned)
+// ARC-NATIVE: declare i8* @objc_retain(i8*) [[NLB:#[0-9]+]]
+// ARC-NATIVE: declare i8* @objc_autoreleaseReturnValue(i8*)
 // ARC-NATIVE: declare i8* @objc_msgSend(i8*, i8*, ...) [[NLB]]
 // ARC-NATIVE: declare void @objc_release(i8*) [[NLB]]
-// ARC-NATIVE: declare i8* @objc_retainAutoreleasedReturnValue(i8* returned)
+// ARC-NATIVE: declare i8* @objc_retainAutoreleasedReturnValue(i8*)
 // ARC-NATIVE: declare i8* @objc_initWeak(i8**, i8*)
 // ARC-NATIVE: declare i8* @objc_storeWeak(i8**, i8*)
 // ARC-NATIVE: declare i8* @objc_loadWeakRetained(i8**)
 // ARC-NATIVE: declare void @objc_destroyWeak(i8**)
-// declare i8* @objc_autorelease(i8*)
-// ARC-NATIVE: declare i8* @objc_retainAutorelease(i8* returned)
+// ARC-NATIVE: declare i8* @objc_autorelease(i8*)
+// ARC-NATIVE: declare i8* @objc_retainAutorelease(i8*)
 
 // CHECK-LABEL: define void @test0
 void test0(id x) {
@@ -1504,9 +1504,7 @@ void test68(void) {
 // CHECK:      [[SELF:%.*]] = alloca [[TEST69:%.*]]*, align 8
 // CHECK:      [[T0:%.*]] = load [[TEST69]]*, [[TEST69]]** [[SELF]], align 8
 // CHECK-NEXT: [[T1:%.*]] = bitcast [[TEST69]]* [[T0]] to i8*
-// CHECK-NEXT: [[RETAIN:%.*]] = call i8* @objc_retain(i8* [[T1]])
-// CHECK-NEXT: [[AUTORELEASE:%.*]] = tail call i8* @objc_autoreleaseReturnValue(i8* [[RETAIN]])
-// CHECK-NEXT: ret i8* [[AUTORELEASE]]
+// CHECK-NEXT: ret i8* [[T1]]
 
 // rdar://problem/10907547
 void test70(id i) {