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Imported Upstream version 6.4.0.137

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Former-commit-id: 943baa9f16a098c33e129777827f3a9d20da00d6
This commit is contained in:
Xamarin Public Jenkins (auto-signing)
2019-07-26 19:53:28 +00:00
parent e9207cf623
commit ef583813eb
2712 changed files with 74169 additions and 40587 deletions
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11
external/llvm/lib/Transforms/Scalar/DivRemPairs.cpp vendored
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@ -13,6 +13,8 @@
//===----------------------------------------------------------------------===//
#include "llvm/Transforms/Scalar/DivRemPairs.h"
#include "llvm/ADT/DenseMap.h"
#include "llvm/ADT/MapVector.h"
#include "llvm/ADT/Statistic.h"
#include "llvm/Analysis/GlobalsModRef.h"
#include "llvm/Analysis/TargetTransformInfo.h"
@ -48,7 +50,10 @@ static bool optimizeDivRem(Function &F, const TargetTransformInfo &TTI,
// Insert all divide and remainder instructions into maps keyed by their
// operands and opcode (signed or unsigned).
DenseMap<DivRemMapKey, Instruction *> DivMap, RemMap;
DenseMap<DivRemMapKey, Instruction *> DivMap;
// Use a MapVector for RemMap so that instructions are moved/inserted in a
// deterministic order.
MapVector<DivRemMapKey, Instruction *> RemMap;
for (auto &BB : F) {
for (auto &I : BB) {
if (I.getOpcode() == Instruction::SDiv)
@ -67,14 +72,14 @@ static bool optimizeDivRem(Function &F, const TargetTransformInfo &TTI,
// rare than division.
for (auto &RemPair : RemMap) {
// Find the matching division instruction from the division map.
Instruction *DivInst = DivMap[RemPair.getFirst()];
Instruction *DivInst = DivMap[RemPair.first];
if (!DivInst)
continue;
// We have a matching pair of div/rem instructions. If one dominates the
// other, hoist and/or replace one.
NumPairs++;
Instruction *RemInst = RemPair.getSecond();
Instruction *RemInst = RemPair.second;
bool IsSigned = DivInst->getOpcode() == Instruction::SDiv;
bool HasDivRemOp = TTI.hasDivRemOp(DivInst->getType(), IsSigned);