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llvm-project/llvm/test/Transforms/LoopIdiom/unordered-atomic-memcpy-noa...

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[Atomics][LoopIdiom] Recognize unordered atomic memcpy Summary: Expanding the loop idiom test for memcpy to also recognize unordered atomic memcpy. The only difference for recognizing an unordered atomic memcpy and instead of a normal memcpy is that the loads and/or stores involved are unordered atomic operations. Background: http://lists.llvm.org/pipermail/llvm-dev/2017-May/112779.html Patch by Daniel Neilson! Reviewers: reames, anna, skatkov Reviewed By: reames, anna Subscribers: llvm-commits, mzolotukhin Differential Revision: https://reviews.llvm.org/D33243 llvm-svn: 304806
2017-06-07 00:45:25 +08:00
; RUN: opt -basicaa -loop-idiom < %s -S | FileCheck %s
target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64"
;; memcpy.atomic formation (atomic load & store) -- element size 2
;; Will not create call due to a max element size of 0
define void @test1(i64 %Size) nounwind ssp {
; CHECK-LABEL: @test1(
[Atomics] Rename and change prototype for atomic memcpy intrinsic Summary: Background: http://lists.llvm.org/pipermail/llvm-dev/2017-May/112779.html This change is to alter the prototype for the atomic memcpy intrinsic. The prototype itself is being changed to more closely resemble the semantics and parameters of the llvm.memcpy intrinsic -- to ease later combination of the llvm.memcpy and atomic memcpy intrinsics. Furthermore, the name of the atomic memcpy intrinsic is being changed to make it clear that it is not a generic atomic memcpy, but specifically a memcpy is unordered atomic. Reviewers: reames, sanjoy, efriedma Reviewed By: reames Subscribers: mzolotukhin, anna, llvm-commits, skatkov Differential Revision: https://reviews.llvm.org/D33240 llvm-svn: 305558
2017-06-16 22:43:59 +08:00
; CHECK-NOT: call void @llvm.memcpy.element.unordered.atomic
[Atomics][LoopIdiom] Recognize unordered atomic memcpy Summary: Expanding the loop idiom test for memcpy to also recognize unordered atomic memcpy. The only difference for recognizing an unordered atomic memcpy and instead of a normal memcpy is that the loads and/or stores involved are unordered atomic operations. Background: http://lists.llvm.org/pipermail/llvm-dev/2017-May/112779.html Patch by Daniel Neilson! Reviewers: reames, anna, skatkov Reviewed By: reames, anna Subscribers: llvm-commits, mzolotukhin Differential Revision: https://reviews.llvm.org/D33243 llvm-svn: 304806
2017-06-07 00:45:25 +08:00
; CHECK: store
; CHECK: ret void
bb.nph:
%Base = alloca i16, i32 10000
%Dest = alloca i16, i32 10000
br label %for.body
for.body: ; preds = %bb.nph, %for.body
%indvar = phi i64 [ 0, %bb.nph ], [ %indvar.next, %for.body ]
%I.0.014 = getelementptr i16, i16* %Base, i64 %indvar
%DestI = getelementptr i16, i16* %Dest, i64 %indvar
%V = load atomic i16, i16* %I.0.014 unordered, align 2
store atomic i16 %V, i16* %DestI unordered, align 2
%indvar.next = add i64 %indvar, 1
%exitcond = icmp eq i64 %indvar.next, %Size
br i1 %exitcond, label %for.end, label %for.body
for.end: ; preds = %for.body, %entry
ret void
}