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move isBytewiseValue out to ValueTracking.h/cpp

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@122565 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Chris Lattner
2010-12-26 20:15:01 +00:00
parent e6bb649ec6
commit bb89710ddd
3 changed files with 77 additions and 69 deletions
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8
include/llvm/Analysis/ValueTracking.h
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@@ -77,7 +77,13 @@ namespace llvm {
///
bool CannotBeNegativeZero(const Value *V, unsigned Depth = 0);
/// isBytewiseValue - If the specified value can be set by repeating the same
/// byte in memory, return the i8 value that it is represented with. This is
/// true for all i8 values obviously, but is also true for i32 0, i32 -1,
/// i16 0xF0F0, double 0.0 etc. If the value can't be handled with a repeated
/// byte store (e.g. i16 0x1234), return null.
Value *isBytewiseValue(Value *V);
/// FindInsertedValue - Given an aggregrate and an sequence of indices, see if
/// the scalar value indexed is already around as a register, for example if
/// it were inserted directly into the aggregrate.