From 846a2f2703f6bb894098274964faf5dce0b68c4d Mon Sep 17 00:00:00 2001
From: Dan Gohman <gohman@apple.com>
Date: Thu, 27 Aug 2009 17:51:25 +0000
Subject: [PATCH] Handle TargetData with const.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80262 91177308-0d34-0410-b5e6-96231b3b80d8
---
 include/llvm/Analysis/ValueTracking.h | 6 +++---
 lib/Analysis/ValueTracking.cpp        | 7 ++++---
 2 files changed, 7 insertions(+), 6 deletions(-)

diff --git a/include/llvm/Analysis/ValueTracking.h b/include/llvm/Analysis/ValueTracking.h
index 1ebd9c26c4a..6bb3b3c98e8 100644
--- a/include/llvm/Analysis/ValueTracking.h
+++ b/include/llvm/Analysis/ValueTracking.h
@@ -30,14 +30,14 @@ namespace llvm {
   /// bit sets.  This code only analyzes bits in Mask, in order to short-circuit
   /// processing.
   void ComputeMaskedBits(Value *V, const APInt &Mask, APInt &KnownZero,
-                         APInt &KnownOne, TargetData *TD = 0,
+                         APInt &KnownOne, const TargetData *TD = 0,
                          unsigned Depth = 0);
   
   /// MaskedValueIsZero - Return true if 'V & Mask' is known to be zero.  We use
   /// this predicate to simplify operations downstream.  Mask is known to be
   /// zero for bits that V cannot have.
   bool MaskedValueIsZero(Value *V, const APInt &Mask, 
-                         TargetData *TD = 0, unsigned Depth = 0);
+                         const TargetData *TD = 0, unsigned Depth = 0);
 
   
   /// ComputeNumSignBits - Return the number of times the sign bit of the
@@ -48,7 +48,7 @@ namespace llvm {
   ///
   /// 'Op' must have a scalar integer type.
   ///
-  unsigned ComputeNumSignBits(Value *Op, TargetData *TD = 0,
+  unsigned ComputeNumSignBits(Value *Op, const TargetData *TD = 0,
                               unsigned Depth = 0);
 
   /// CannotBeNegativeZero - Return true if we can prove that the specified FP 
diff --git a/lib/Analysis/ValueTracking.cpp b/lib/Analysis/ValueTracking.cpp
index 2042d2e0a1e..cb2d624a909 100644
--- a/lib/Analysis/ValueTracking.cpp
+++ b/lib/Analysis/ValueTracking.cpp
@@ -37,7 +37,7 @@ using namespace llvm;
 /// this won't lose us code quality.
 void llvm::ComputeMaskedBits(Value *V, const APInt &Mask,
                              APInt &KnownZero, APInt &KnownOne,
-                             TargetData *TD, unsigned Depth) {
+                             const TargetData *TD, unsigned Depth) {
   const unsigned MaxDepth = 6;
   assert(V && "No Value?");
   assert(Depth <= MaxDepth && "Limit Search Depth");
@@ -609,7 +609,7 @@ void llvm::ComputeMaskedBits(Value *V, const APInt &Mask,
 /// this predicate to simplify operations downstream.  Mask is known to be zero
 /// for bits that V cannot have.
 bool llvm::MaskedValueIsZero(Value *V, const APInt &Mask,
-                             TargetData *TD, unsigned Depth) {
+                             const TargetData *TD, unsigned Depth) {
   APInt KnownZero(Mask.getBitWidth(), 0), KnownOne(Mask.getBitWidth(), 0);
   ComputeMaskedBits(V, Mask, KnownZero, KnownOne, TD, Depth);
   assert((KnownZero & KnownOne) == 0 && "Bits known to be one AND zero?"); 
@@ -626,7 +626,8 @@ bool llvm::MaskedValueIsZero(Value *V, const APInt &Mask,
 ///
 /// 'Op' must have a scalar integer type.
 ///
-unsigned llvm::ComputeNumSignBits(Value *V, TargetData *TD, unsigned Depth) {
+unsigned llvm::ComputeNumSignBits(Value *V, const TargetData *TD,
+                                  unsigned Depth) {
   assert((TD || V->getType()->isIntOrIntVector()) &&
          "ComputeNumSignBits requires a TargetData object to operate "
          "on non-integer values!");