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Sink store based on alias analysis

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- by Ella Bolshinsky
The alias analysis is used define whether the given instruction
is a barrier for store sinking. For 2 identical stores, following
instructions are checked in the both basic blocks, to determine
whether they are sinking barriers.

http://reviews.llvm.org/D6420



git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@224247 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Elena Demikhovsky
2014-12-15 14:09:53 +00:00
parent 299e0d4c24
commit 2f6d42351a
4 changed files with 62 additions and 62 deletions
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25
include/llvm/Analysis/AliasAnalysis.h
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@@ -502,7 +502,7 @@ public:
///
/// canBasicBlockModify - Return true if it is possible for execution of the
/// specified basic block to modify the value pointed to by Ptr.
/// specified basic block to modify the location Loc.
bool canBasicBlockModify(const BasicBlock &BB, const Location &Loc);
/// canBasicBlockModify - A convenience wrapper.
@@ -510,17 +510,20 @@ public:
return canBasicBlockModify(BB, Location(P, Size));
}
/// canInstructionRangeModify - Return true if it is possible for the
/// execution of the specified instructions to modify the value pointed to by
/// Ptr. The instructions to consider are all of the instructions in the
/// range of [I1,I2] INCLUSIVE. I1 and I2 must be in the same basic block.
bool canInstructionRangeModify(const Instruction &I1, const Instruction &I2,
const Location &Loc);
/// canInstructionRangeModRef - Return true if it is possible for the
/// execution of the specified instructions to mod\ref (according to the
/// mode) the location Loc. The instructions to consider are all
/// of the instructions in the range of [I1,I2] INCLUSIVE.
/// I1 and I2 must be in the same basic block.
bool canInstructionRangeModRef(const Instruction &I1,
const Instruction &I2, const Location &Loc,
const ModRefResult Mode);
/// canInstructionRangeModify - A convenience wrapper.
bool canInstructionRangeModify(const Instruction &I1, const Instruction &I2,
const Value *Ptr, uint64_t Size) {
return canInstructionRangeModify(I1, I2, Location(Ptr, Size));
/// canInstructionRangeModRef - A convenience wrapper.
bool canInstructionRangeModRef(const Instruction &I1,
const Instruction &I2, const Value *Ptr,
uint64_t Size, const ModRefResult Mode) {
return canInstructionRangeModRef(I1, I2, Location(Ptr, Size), Mode);
}
//===--------------------------------------------------------------------===//