; 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(i32* %ptr2, i32 %count, i32* %coeff) {
+define i32 @test_noalias_1(i32* %ptr2, i32 %count, i32* %coeff) {
entry:
- %ptr = getelementptr inbounds i32* %ptr2, i64 1
+ %ptr = getelementptr inbounds i32, i32* %ptr2, i64 1
br label %while.body
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
+ %0 = load i32, 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
+ %1 = load i32, i32* %coeff, align 4
+ %2 = load i32, 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
+ %ptr_inc = getelementptr inbounds i32, i32* %ptr_phi, i64 1
+ %ptr2_inc = getelementptr inbounds i32, 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, 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, i32* %ptr_phi, align 4
+ store i32 %0, i32* %ptr2_phi, align 4
+ %1 = load i32, i32* %coeff, align 4
+ %2 = load i32, 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, i32* %ptr_phi, i64 1
+ %ptr2_inc = getelementptr inbounds i32, i32* %ptr2_phi, i64 1
+ br i1 %tobool, label %outer.while.backedge, label %while.body
+
+outer.while.backedge:
+ %ptr_inc_outer = getelementptr inbounds i32, i32* %ptr_phi, i64 1
+ %ptr2_inc_outer = getelementptr inbounds i32, 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
+}