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Handle TargetData with const.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@80262 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Dan Gohman 2009-08-27 17:51:25 +00:00
parent 0aeed044d6
commit 846a2f2703
2 changed files with 7 additions and 6 deletions
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6
include/llvm/Analysis/ValueTracking.h
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@ -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

7
lib/Analysis/ValueTracking.cpp
View File

@ -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!");