[PATCH] D61669: [ValueTracking] Look through ptrmask intrinsics during getUnderlyingObject.

[Florian Hahn via Phabricator via llvm-commits]

fhahn created this revision.
fhahn added reviewers: nlopes, efriedma, hfinkel, sanjoy.
Herald added a subscriber: hiraditya.
Herald added a project: LLVM.

Repository:
  rG LLVM Github Monorepo

https://reviews.llvm.org/D61669

Files:
  llvm/lib/Analysis/ValueTracking.cpp
  llvm/test/Analysis/BasicAA/ptrmask.ll


Index: llvm/test/Analysis/BasicAA/ptrmask.ll
===================================================================
--- /dev/null
+++ llvm/test/Analysis/BasicAA/ptrmask.ll
@@ -0,0 +1,25 @@
+; RUN: opt -basicaa -aa-eval -print-no-aliases -disable-output %s 2>&1 | FileCheck %s
+
+target datalayout = "e-m:o-i64:64-f80:128-n8:16:32:64-S128-p0:48:64:128-p1:56:64:64"
+
+%struct = type <{ [20 x i64] }>
+
+; CHECK-LABEL: Function: test1: 5 pointers, 2 call sites
+; CHECK-NEXT:   NoAlias: %struct** %loc, i64* %offset.addr
+; CHECK-NEXT:   NoAlias:  %struct* %addr, %struct** %loc
+; CHECK-NEXT:   NoAlias:  %struct* %addr.ptr, %struct** %loc
+; CHECK-NEXT:   NoAlias:  %struct** %loc, i64* %gep
+define void @test1(i64* %offset.addr) {
+entry:
+  %loc = alloca %struct*, align 8
+  call void @init(i64 0, %struct** %loc)
+  %addr = load %struct*, %struct** %loc, align 8
+  %addr.ptr = call %struct* @llvm.ptrmask.p0s_struct.p0s.struct.i64(%struct* %addr, i64 72057594037927928)
+  %offset = load i64, i64* %offset.addr, align 8
+  %gep = getelementptr inbounds %struct, %struct* %addr.ptr, i64 0, i32 0, i64 %offset
+  store i64 1, i64* %gep, align 8
+  ret void
+}
+
+declare %struct* @llvm.ptrmask.p0s_struct.p0s.struct.i64(%struct*, i64)
+declare void @init(i64, %struct**)
Index: llvm/lib/Analysis/ValueTracking.cpp
===================================================================
--- llvm/lib/Analysis/ValueTracking.cpp
+++ llvm/lib/Analysis/ValueTracking.cpp
@@ -3697,7 +3697,8 @@
 bool llvm::isIntrinsicReturningPointerAliasingArgumentWithoutCapturing(
     const CallBase *Call) {
   return Call->getIntrinsicID() == Intrinsic::launder_invariant_group ||
-         Call->getIntrinsicID() == Intrinsic::strip_invariant_group;
+         Call->getIntrinsicID() == Intrinsic::strip_invariant_group ||
+         Call->getIntrinsicID() == Intrinsic::ptrmask;
 }
 
 /// \p PN defines a loop-variant pointer to an object.  Check if the


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