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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes='default<O2>' -S < %s | FileCheck %s
define void @copy(ptr noalias %to, ptr noalias %from) {
; CHECK-LABEL: @copy(
; CHECK-NEXT: [[X:%.*]] = load i32, ptr [[FROM:%.*]], align 4
; CHECK-NEXT: store i32 [[X]], ptr [[TO:%.*]], align 4
; CHECK-NEXT: ret void
;
%x = load i32, ptr %from
store i32 %x, ptr %to
ret void
}
; Consider that %addr1 = %addr2 + 1, in which case %addr2i and %addr1i are
; noalias within one iteration, but may alias across iterations.
define void @pr39282(ptr %addr1, ptr %addr2) {
; CHECK-LABEL: @pr39282(
; CHECK-NEXT: start:
; CHECK-NEXT: call void @llvm.experimental.noalias.scope.decl
; CHECK-NEXT: call void @llvm.experimental.noalias.scope.decl
; CHECK-NEXT: [[X_I:%.*]] = load i32, ptr [[ADDR1:%.*]], align 4, !alias.scope !3, !noalias !0
; CHECK-NEXT: store i32 [[X_I]], ptr [[ADDR2:%.*]], align 4, !alias.scope !0, !noalias !3
; CHECK-NEXT: [[ADDR1I_1:%.*]] = getelementptr inbounds i32, ptr [[ADDR1]], i64 1
; CHECK-NEXT: [[ADDR2I_1:%.*]] = getelementptr inbounds i32, ptr [[ADDR2]], i64 1
; CHECK-NEXT: call void @llvm.experimental.noalias.scope.decl
; CHECK-NEXT: call void @llvm.experimental.noalias.scope.decl
; CHECK-NEXT: [[X_I_1:%.*]] = load i32, ptr [[ADDR1I_1]], align 4, !alias.scope !7, !noalias !5
; CHECK-NEXT: store i32 [[X_I_1]], ptr [[ADDR2I_1]], align 4, !alias.scope !5, !noalias !7
; CHECK-NEXT: call void @llvm.experimental.noalias.scope.decl
; CHECK-NEXT: call void @llvm.experimental.noalias.scope.decl
; CHECK-NEXT: [[X_I_2:%.*]] = load i32, ptr [[ADDR1]], align 4, !alias.scope !11, !noalias !9
; CHECK-NEXT: store i32 [[X_I_2]], ptr [[ADDR2]], align 4, !alias.scope !9, !noalias !11
; CHECK-NEXT: call void @llvm.experimental.noalias.scope.decl
; CHECK-NEXT: call void @llvm.experimental.noalias.scope.decl
; CHECK-NEXT: [[X_I_3:%.*]] = load i32, ptr [[ADDR1I_1]], align 4, !alias.scope !15, !noalias !13
; CHECK-NEXT: store i32 [[X_I_3]], ptr [[ADDR2I_1]], align 4, !alias.scope !13, !noalias !15
; CHECK-NEXT: ret void
;
start:
br label %body
body:
%i = phi i32 [ 0, %start ], [ %i.next, %body ]
%j = and i32 %i, 1
%addr1i = getelementptr inbounds i32, ptr %addr1, i32 %j
%addr2i = getelementptr inbounds i32, ptr %addr2, i32 %j
call void @copy(ptr %addr2i, ptr %addr1i)
%i.next = add i32 %i, 1
%cmp = icmp slt i32 %i.next, 4
br i1 %cmp, label %body, label %end
end:
ret void
}
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