Update the comments on default subtargets based on feedback.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@309041 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/AArch64/AArch64TargetMachine.h b/lib/Target/AArch64/AArch64TargetMachine.h
index 85de02e..a2a0a7a 100644 (file)
--- a/lib/Target/AArch64/AArch64TargetMachine.h
+++ b/lib/Target/AArch64/AArch64TargetMachine.h
@@ -36,8 +36,9 @@ public:
 
   ~AArch64TargetMachine() override;
   const AArch64Subtarget *getSubtargetImpl(const Function &F) const override;
-  // The no argument getSubtargetImpl, while it exists on some, targets is
-  // deprecated and should not be used.
+  // DO NOT IMPLEMENT: There is no such thing as a valid default subtarget,
+  // subtargets are per-function entities based on the target-specific
+  // attributes of each function.
   const AArch64Subtarget *getSubtargetImpl() const = delete;
 
   // Pass Pipeline Configuration

diff --git a/lib/Target/ARM/ARMTargetMachine.h b/lib/Target/ARM/ARMTargetMachine.h
index 22ce949..bc4c751 100644 (file)
--- a/lib/Target/ARM/ARMTargetMachine.h
+++ b/lib/Target/ARM/ARMTargetMachine.h
@@ -47,8 +47,9 @@ public:
   ~ARMBaseTargetMachine() override;
 
   const ARMSubtarget *getSubtargetImpl(const Function &F) const override;
-  // The no argument getSubtargetImpl, while it exists on some targets, is
-  // deprecated and should not be used.
+  // DO NOT IMPLEMENT: There is no such thing as a valid default subtarget,
+  // subtargets are per-function entities based on the target-specific
+  // attributes of each function.
   const ARMSubtarget *getSubtargetImpl() const = delete;
   bool isLittleEndian() const { return isLittle; }
 

diff --git a/lib/Target/PowerPC/PPCTargetMachine.h b/lib/Target/PowerPC/PPCTargetMachine.h
index be70550..81b5ef2 100644 (file)
--- a/lib/Target/PowerPC/PPCTargetMachine.h
+++ b/lib/Target/PowerPC/PPCTargetMachine.h
@@ -41,8 +41,9 @@ public:
   ~PPCTargetMachine() override;
 
   const PPCSubtarget *getSubtargetImpl(const Function &F) const override;
-  // The no argument getSubtargetImpl, while it exists on some targets, is
-  // deprecated and should not be used.
+  // DO NOT IMPLEMENT: There is no such thing as a valid default subtarget,
+  // subtargets are per-function entities based on the target-specific
+  // attributes of each function.
   const PPCSubtarget *getSubtargetImpl() const = delete;
 
   // Pass Pipeline Configuration

diff --git a/lib/Target/X86/X86TargetMachine.h b/lib/Target/X86/X86TargetMachine.h
index c162079..617cec2 100644 (file)
--- a/lib/Target/X86/X86TargetMachine.h
+++ b/lib/Target/X86/X86TargetMachine.h
@@ -40,8 +40,9 @@ public:
   ~X86TargetMachine() override;
 
   const X86Subtarget *getSubtargetImpl(const Function &F) const override;
-  // The no argument getSubtargetImpl, while it exists on some targets, is
-  // deprecated and should not be used.
+  // DO NOT IMPLEMENT: There is no such thing as a valid default subtarget,
+  // subtargets are per-function entities based on the target-specific
+  // attributes of each function.
   const X86Subtarget *getSubtargetImpl() const = delete;
 
   TargetIRAnalysis getTargetIRAnalysis() override;