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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-S128"
; RUN: opt < %s -basicaa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
; ptr_phi and ptr2_phi do not alias.
; CHECK: test_noalias_1
; CHECK: NoAlias: i32* %ptr2_phi, i32* %ptr_phi
define i32 @test_noalias_1(i32* %ptr2, i32 %count, i32* %coeff) {
entry:
%ptr = getelementptr inbounds i32* %ptr2, i64 1
br label %while.body
while.body:
%num = phi i32 [ %count, %entry ], [ %dec, %while.body ]
%ptr_phi = phi i32* [ %ptr, %entry ], [ %ptr_inc, %while.body ]
%ptr2_phi = phi i32* [ %ptr2, %entry ], [ %ptr2_inc, %while.body ]
%result.09 = phi i32 [ 0 , %entry ], [ %add, %while.body ]
%dec = add nsw i32 %num, -1
%0 = load i32* %ptr_phi, align 4
store i32 %0, i32* %ptr2_phi, align 4
%1 = load i32* %coeff, align 4
%2 = load i32* %ptr_phi, align 4
%mul = mul nsw i32 %1, %2
%add = add nsw i32 %mul, %result.09
%tobool = icmp eq i32 %dec, 0
%ptr_inc = getelementptr inbounds i32* %ptr_phi, i64 1
%ptr2_inc = getelementptr inbounds i32* %ptr2_phi, i64 1
br i1 %tobool, label %the_exit, label %while.body
the_exit:
ret i32 %add
}
; CHECK: test_noalias_2
; CHECK: NoAlias: i32* %ptr_outer_phi, i32* %ptr_outer_phi2
; CHECK: NoAlias: i32* %ptr2_phi, i32* %ptr_phi
define i32 @test_noalias_2(i32* %ptr2, i32 %count, i32* %coeff) {
entry:
%ptr = getelementptr inbounds i32* %ptr2, i64 1
br label %outer.while.header
outer.while.header:
%ptr_outer_phi = phi i32* [%ptr_inc_outer, %outer.while.backedge], [ %ptr, %entry]
%ptr_outer_phi2 = phi i32* [%ptr2_inc_outer, %outer.while.backedge], [ %ptr2, %entry]
%num.outer = phi i32 [ %count, %entry ], [ %dec.outer, %outer.while.backedge ]
br label %while.body
while.body:
%num = phi i32 [ %count, %outer.while.header ], [ %dec, %while.body ]
%ptr_phi = phi i32* [ %ptr_outer_phi, %outer.while.header ], [ %ptr_inc, %while.body ]
%ptr2_phi = phi i32* [ %ptr_outer_phi2, %outer.while.header ], [ %ptr2_inc, %while.body ]
%result.09 = phi i32 [ 0 , %outer.while.header ], [ %add, %while.body ]
%dec = add nsw i32 %num, -1
%0 = load i32* %ptr_phi, align 4
store i32 %0, i32* %ptr2_phi, align 4
%1 = load i32* %coeff, align 4
%2 = load i32* %ptr_phi, align 4
%mul = mul nsw i32 %1, %2
%add = add nsw i32 %mul, %result.09
%tobool = icmp eq i32 %dec, 0
%ptr_inc = getelementptr inbounds i32* %ptr_phi, i64 1
%ptr2_inc = getelementptr inbounds i32* %ptr2_phi, i64 1
br i1 %tobool, label %outer.while.backedge, label %while.body
outer.while.backedge:
%ptr_inc_outer = getelementptr inbounds i32* %ptr_phi, i64 1
%ptr2_inc_outer = getelementptr inbounds i32* %ptr2_phi, i64 1
%dec.outer = add nsw i32 %num.outer, -1
%br.cond = icmp eq i32 %dec.outer, 0
br i1 %br.cond, label %the_exit, label %outer.while.header
the_exit:
ret i32 %add
}
; CHECK: test_noalias_3
; CHECK: MayAlias: i8* %ptr2_phi, i8* %ptr_phi
define i32 @test_noalias_3(i8* noalias %x, i8* noalias %y, i8* noalias %z,
i32 %count) {
entry:
br label %while.body
while.body:
%num = phi i32 [ %count, %entry ], [ %dec, %while.body ]
%ptr_phi = phi i8* [ %x, %entry ], [ %z, %while.body ]
%ptr2_phi = phi i8* [ %y, %entry ], [ %ptr_phi, %while.body ]
%dec = add nsw i32 %num, -1
%tobool = icmp eq i32 %dec, 0
br i1 %tobool, label %the_exit, label %while.body
the_exit:
ret i32 1
}
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