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Propagate TBAA info in SelectionDAG::getIndexedLoad

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Patch by Pranav Bhandarkar.

llvm-svn: 279998
This commit is contained in:
Krzysztof Parzyszek 2016-08-29 19:50:15 +00:00
parent 0455dc465b
commit 0b67800907
2 changed files with 39 additions and 1 deletions
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3
lib/CodeGen/SelectionDAG/SelectionDAG.cpp
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@ -5146,7 +5146,8 @@ SDValue SelectionDAG::getIndexedLoad(SDValue OrigLoad, const SDLoc &dl,
LD->getMemOperand()->getFlags() & ~MachineMemOperand::MOInvariant;
return getLoad(AM, LD->getExtensionType(), OrigLoad.getValueType(), dl,
LD->getChain(), Base, Offset, LD->getPointerInfo(),
LD->getMemoryVT(), LD->getAlignment(), MMOFlags);
LD->getMemoryVT(), LD->getAlignment(), MMOFlags,
LD->getAAInfo());
}
SDValue SelectionDAG::getStore(SDValue Chain, const SDLoc &dl, SDValue Val,

37
test/CodeGen/Hexagon/post-inc-aa-metadata.ll Normal file
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@ -0,0 +1,37 @@
; RUN: llc -march=hexagon -debug-only=isel < %s 2>&1 | FileCheck %s
; REQUIRES: asserts
; Check that the generated post-increment load has TBAA information.
; CHECK-LABEL: Machine code for function fred:
; CHECK: = V6_vL32b_pi %vreg{{[0-9]+}}<tied1>, 64; mem:LD64[{{.*}}](tbaa=
target triple = "hexagon"
; Function Attrs: norecurse nounwind
define void @fred(<16 x i32>* nocapture %p, <16 x i32>* nocapture readonly %q, i32 %n) local_unnamed_addr #0 {
entry:
%tobool2 = icmp eq i32 %n, 0
br i1 %tobool2, label %while.end, label %while.body
while.body: ; preds = %entry, %while.body
%n.addr.05 = phi i32 [ %dec, %while.body ], [ %n, %entry ]
%q.addr.04 = phi <16 x i32>* [ %incdec.ptr, %while.body ], [ %q, %entry ]
%p.addr.03 = phi <16 x i32>* [ %incdec.ptr1, %while.body ], [ %p, %entry ]
%dec = add i32 %n.addr.05, -1
%incdec.ptr = getelementptr inbounds <16 x i32>, <16 x i32>* %q.addr.04, i32 1
%0 = load <16 x i32>, <16 x i32>* %q.addr.04, align 64, !tbaa !1
%incdec.ptr1 = getelementptr inbounds <16 x i32>, <16 x i32>* %p.addr.03, i32 1
store <16 x i32> %0, <16 x i32>* %p.addr.03, align 64, !tbaa !1
%tobool = icmp eq i32 %dec, 0
br i1 %tobool, label %while.end, label %while.body
while.end: ; preds = %while.body, %entry
ret void
}
attributes #0 = { norecurse nounwind "target-cpu"="hexagonv60" "target-features"="+hvx,-hvx-double" }
!1 = !{!2, !2, i64 0}
!2 = !{!"omnipotent char", !3, i64 0}
!3 = !{!"Simple C/C++ TBAA"}