[llvm] 77a6b35 - [Attributor][NFCI] Do not track unnecessary dependences
Johannes Doerfert via llvm-commits
llvm-commits at lists.llvm.org
Sat Nov 2 13:33:21 PDT 2019
Author: Johannes Doerfert
Date: 2019-11-02T15:26:30-05:00
New Revision: 77a6b358b51f363d0f1626579720e654ca5aae9a
URL: https://github.com/llvm/llvm-project/commit/77a6b358b51f363d0f1626579720e654ca5aae9a
DIFF: https://github.com/llvm/llvm-project/commit/77a6b358b51f363d0f1626579720e654ca5aae9a.diff
LOG: [Attributor][NFCI] Do not track unnecessary dependences
If we do not look at assumed information there is no need to track
dependences.
Added:
Modified:
llvm/lib/Transforms/IPO/Attributor.cpp
Removed:
################################################################################
diff --git a/llvm/lib/Transforms/IPO/Attributor.cpp b/llvm/lib/Transforms/IPO/Attributor.cpp
index 08c682dfcd6d..b7471a32faf4 100644
--- a/llvm/lib/Transforms/IPO/Attributor.cpp
+++ b/llvm/lib/Transforms/IPO/Attributor.cpp
@@ -1685,7 +1685,10 @@ static int64_t getKnownNonNullAndDerefBytesForUse(
unsigned ArgNo = ICS.getArgumentNo(U);
IRPosition IRP = IRPosition::callsite_argument(ICS, ArgNo);
- auto &DerefAA = A.getAAFor<AADereferenceable>(QueryingAA, IRP);
+ // As long as we only use known information there is no need to track
+ // dependences here.
+ auto &DerefAA = A.getAAFor<AADereferenceable>(QueryingAA, IRP,
+ /* TrackDependence */ false);
IsNonNull |= DerefAA.isKnownNonNull();
return DerefAA.getKnownDereferenceableBytes();
}
@@ -1718,8 +1721,10 @@ static int64_t getKnownNonNullAndDerefBytesForUse(
GetPointerBaseWithConstantOffset(UseV, Offset, DL,
/*AllowNonInbounds*/ false)) {
if (Base == &AssociatedValue) {
- auto &DerefAA =
- A.getAAFor<AADereferenceable>(QueryingAA, IRPosition::value(*Base));
+ // As long as we only use known information there is no need to track
+ // dependences here.
+ auto &DerefAA = A.getAAFor<AADereferenceable>(
+ QueryingAA, IRPosition::value(*Base), /* TrackDependence */ false);
IsNonNull |= (!NullPointerIsDefined && DerefAA.isKnownNonNull());
IsNonNull |= (!NullPointerIsDefined && (Offset != 0));
int64_t DerefBytes = DerefAA.getKnownDereferenceableBytes();
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