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Add a new interface to allow IR-level passes to access codegen-specific information.

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git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165665 91177308-0d34-0410-b5e6-96231b3b80d8
This commit is contained in:
Nadav Rotem
2012-10-10 22:04:55 +00:00
parent 3a55b64e5e
commit e3d0e86919
43 changed files with 811 additions and 317 deletions
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lib/Analysis/ScalarEvolutionExpander.cpp
+6 -6
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@@ -19,8 +19,8 @@
#include "llvm/LLVMContext.h"
#include "llvm/Support/Debug.h"
#include "llvm/DataLayout.h"
#include "llvm/Target/TargetLowering.h"
#include "llvm/ADT/STLExtras.h"
#include "llvm/TargetTransformInfo.h"
using namespace llvm;
@@ -1599,15 +1599,15 @@ static bool width_descending(Value *lhs, Value *rhs) {
/// This does not depend on any SCEVExpander state but should be used in
/// the same context that SCEVExpander is used.
unsigned SCEVExpander::replaceCongruentIVs(Loop *L, const DominatorTree *DT,
SmallVectorImpl<WeakVH> &DeadInsts,
const TargetLowering *TLI) {
SmallVectorImpl<WeakVH> &DeadInsts,
const ScalarTargetTransformInfo *STTI) {
// Find integer phis in order of increasing width.
SmallVector<PHINode*, 8> Phis;
for (BasicBlock::iterator I = L->getHeader()->begin();
PHINode *Phi = dyn_cast<PHINode>(I); ++I) {
Phis.push_back(Phi);
}
if (TLI)
if (STTI)
std::sort(Phis.begin(), Phis.end(), width_descending);
unsigned NumElim = 0;
@@ -1624,8 +1624,8 @@ unsigned SCEVExpander::replaceCongruentIVs(Loop *L, const DominatorTree *DT,
PHINode *&OrigPhiRef = ExprToIVMap[SE.getSCEV(Phi)];
if (!OrigPhiRef) {
OrigPhiRef = Phi;
if (Phi->getType()->isIntegerTy() && TLI
&& TLI->isTruncateFree(Phi->getType(), Phis.back()->getType())) {
if (Phi->getType()->isIntegerTy() && STTI &&
STTI->isTruncateFree(Phi->getType(), Phis.back()->getType())) {
// This phi can be freely truncated to the narrowest phi type. Map the
// truncated expression to it so it will be reused for narrow types.
const SCEV *TruncExpr =