From 22e911c8dd6b653bae6f24a5f86204ab8419a203 Mon Sep 17 00:00:00 2001
From: Sanjoy Das <sanjoy@playingwithpointers.com>
Date: Thu, 12 Nov 2015 20:51:52 +0000
Subject: [PATCH] Revert r243347 "Add TargetTransformInfo::isZExtFree."

r243347 was intended to support a change to LSR (r243348).  That change
to LSR has since had to be reverted (r243939) because it was buggy, and
now the code added in r243347 is untested and unexercised.  Given that,
I think it is appropriate to revert r243347 for now, with the intent of
adding it back in later if I get around to checking in a fixed version
of r243348.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@252948 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Analysis/TargetTransformInfo.h     | 9 ---------
 include/llvm/Analysis/TargetTransformInfoImpl.h | 2 --
 include/llvm/CodeGen/BasicTTIImpl.h             | 4 ----
 lib/Analysis/TargetTransformInfo.cpp            | 4 ----
 4 files changed, 19 deletions(-)

diff --git a/include/llvm/Analysis/TargetTransformInfo.h b/include/llvm/Analysis/TargetTransformInfo.h
index 1ebbaa03475..98458f1c3f3 100644
--- a/include/llvm/Analysis/TargetTransformInfo.h
+++ b/include/llvm/Analysis/TargetTransformInfo.h
@@ -337,11 +337,6 @@ public:
   /// by referencing its sub-register AX.
   bool isTruncateFree(Type *Ty1, Type *Ty2) const;
 
-  /// \brief Return true if it's free to zero extend a value of type Ty1 to type
-  /// Ty2. e.g. on x86-64, all instructions that define 32-bit values implicit
-  /// zero-extend the result out to 64 bits.
-  bool isZExtFree(Type *Ty1, Type *Ty2) const;
-
   /// \brief Return true if it is profitable to hoist instruction in the
   /// then/else to before if.
   bool isProfitableToHoist(Instruction *I) const;
@@ -581,7 +576,6 @@ public:
                                    int64_t BaseOffset, bool HasBaseReg,
                                    int64_t Scale, unsigned AddrSpace) = 0;
   virtual bool isTruncateFree(Type *Ty1, Type *Ty2) = 0;
-  virtual bool isZExtFree(Type *Ty1, Type *Ty2) = 0;
   virtual bool isProfitableToHoist(Instruction *I) = 0;
   virtual bool isTypeLegal(Type *Ty) = 0;
   virtual unsigned getJumpBufAlignment() = 0;
@@ -721,9 +715,6 @@ public:
   bool isTruncateFree(Type *Ty1, Type *Ty2) override {
     return Impl.isTruncateFree(Ty1, Ty2);
   }
-  bool isZExtFree(Type *Ty1, Type *Ty2) override {
-    return Impl.isZExtFree(Ty1, Ty2);
-  }
   bool isProfitableToHoist(Instruction *I) override {
     return Impl.isProfitableToHoist(I);
   }
diff --git a/include/llvm/Analysis/TargetTransformInfoImpl.h b/include/llvm/Analysis/TargetTransformInfoImpl.h
index 8d5d2a71e42..415a85e9906 100644
--- a/include/llvm/Analysis/TargetTransformInfoImpl.h
+++ b/include/llvm/Analysis/TargetTransformInfoImpl.h
@@ -228,8 +228,6 @@ public:
 
   bool isTruncateFree(Type *Ty1, Type *Ty2) { return false; }
 
-  bool isZExtFree(Type *Ty1, Type *Ty2) { return false; }
-
   bool isProfitableToHoist(Instruction *I) { return true; }
 
   bool isTypeLegal(Type *Ty) { return false; }
diff --git a/include/llvm/CodeGen/BasicTTIImpl.h b/include/llvm/CodeGen/BasicTTIImpl.h
index 3c01bcfbce5..6eb4bb26c9b 100644
--- a/include/llvm/CodeGen/BasicTTIImpl.h
+++ b/include/llvm/CodeGen/BasicTTIImpl.h
@@ -143,10 +143,6 @@ public:
     return getTLI()->isTruncateFree(Ty1, Ty2);
   }
 
-  bool isZExtFree(Type *Ty1, Type *Ty2) const {
-    return getTLI()->isZExtFree(Ty1, Ty2);
-  }
-
   bool isProfitableToHoist(Instruction *I) {
     return getTLI()->isProfitableToHoist(I);
   }
diff --git a/lib/Analysis/TargetTransformInfo.cpp b/lib/Analysis/TargetTransformInfo.cpp
index f82af757125..c2d5c88e641 100644
--- a/lib/Analysis/TargetTransformInfo.cpp
+++ b/lib/Analysis/TargetTransformInfo.cpp
@@ -144,10 +144,6 @@ bool TargetTransformInfo::isTruncateFree(Type *Ty1, Type *Ty2) const {
   return TTIImpl->isTruncateFree(Ty1, Ty2);
 }
 
-bool TargetTransformInfo::isZExtFree(Type *Ty1, Type *Ty2) const {
-  return TTIImpl->isZExtFree(Ty1, Ty2);
-}
-
 bool TargetTransformInfo::isProfitableToHoist(Instruction *I) const {
   return TTIImpl->isProfitableToHoist(I);
 }
-- 
2.11.0