57d57b1afd
With opaque pointers, we cannot use the pointer element type to determine the LocationSize for the AA query. Instead, -aa-eval tests are now required to have an explicit load or store for any pointer they want to compute alias results for, and the load/store types are used to determine the location size. This may affect ordering of results, and sorting within one result, as the type is not considered part of the sorted string anymore. To somewhat minimize the churn, printing still uses faux typed pointer notation.
209 lines
6.6 KiB
LLVM
209 lines
6.6 KiB
LLVM
target datalayout =
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"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"
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; RUN: opt < %s -aa-pipeline=basic-aa -passes=aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s
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; ptr_phi and ptr2_phi do not alias.
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; CHECK: test_noalias_1
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; CHECK: NoAlias: i32* %ptr2_phi, i32* %ptr_phi
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; CHECK: NoAlias: i32* %ptr2_inc, i32* %ptr_inc
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define i32 @test_noalias_1(i32* %ptr2, i32 %count, i32* %coeff) {
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entry:
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%ptr = getelementptr inbounds i32, i32* %ptr2, i64 1
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br label %while.body
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while.body:
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%num = phi i32 [ %count, %entry ], [ %dec, %while.body ]
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%ptr_phi = phi i32* [ %ptr, %entry ], [ %ptr_inc, %while.body ]
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%ptr2_phi = phi i32* [ %ptr2, %entry ], [ %ptr2_inc, %while.body ]
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%result.09 = phi i32 [ 0 , %entry ], [ %add, %while.body ]
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%dec = add nsw i32 %num, -1
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%0 = load i32, i32* %ptr_phi, align 4
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store i32 %0, i32* %ptr2_phi, align 4
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%1 = load i32, i32* %coeff, align 4
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%2 = load i32, i32* %ptr_phi, align 4
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%mul = mul nsw i32 %1, %2
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%add = add nsw i32 %mul, %result.09
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%tobool = icmp eq i32 %dec, 0
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%ptr_inc = getelementptr inbounds i32, i32* %ptr_phi, i64 1
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%ptr2_inc = getelementptr inbounds i32, i32* %ptr2_phi, i64 1
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load i32, i32* %ptr_inc
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load i32, i32* %ptr2_inc
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br i1 %tobool, label %the_exit, label %while.body
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the_exit:
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ret i32 %add
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}
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; CHECK: test_noalias_2
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; CHECK-DAG: NoAlias: i32* %ptr_outer_phi, i32* %ptr_outer_phi2
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; CHECK-DAG: NoAlias: i32* %ptr2_inc_outer, i32* %ptr_inc_outer
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; CHECK-DAG: NoAlias: i32* %ptr2_phi, i32* %ptr_phi
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; CHECK-DAG: NoAlias: i32* %ptr2_inc, i32* %ptr_inc
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define i32 @test_noalias_2(i32* %ptr2, i32 %count, i32* %coeff) {
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entry:
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%ptr = getelementptr inbounds i32, i32* %ptr2, i64 1
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br label %outer.while.header
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outer.while.header:
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%ptr_outer_phi = phi i32* [%ptr_inc_outer, %outer.while.backedge], [ %ptr, %entry]
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%ptr_outer_phi2 = phi i32* [%ptr2_inc_outer, %outer.while.backedge], [ %ptr2, %entry]
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%num.outer = phi i32 [ %count, %entry ], [ %dec.outer, %outer.while.backedge ]
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%ignore1 = load i32, i32* %ptr_outer_phi
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%ignore2 = load i32, i32* %ptr_outer_phi2
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br label %while.body
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while.body:
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%num = phi i32 [ %count, %outer.while.header ], [ %dec, %while.body ]
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%ptr_phi = phi i32* [ %ptr_outer_phi, %outer.while.header ], [ %ptr_inc, %while.body ]
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%ptr2_phi = phi i32* [ %ptr_outer_phi2, %outer.while.header ], [ %ptr2_inc, %while.body ]
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%result.09 = phi i32 [ 0 , %outer.while.header ], [ %add, %while.body ]
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%dec = add nsw i32 %num, -1
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%0 = load i32, i32* %ptr_phi, align 4
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store i32 %0, i32* %ptr2_phi, align 4
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%1 = load i32, i32* %coeff, align 4
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%2 = load i32, i32* %ptr_phi, align 4
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%mul = mul nsw i32 %1, %2
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%add = add nsw i32 %mul, %result.09
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%tobool = icmp eq i32 %dec, 0
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%ptr_inc = getelementptr inbounds i32, i32* %ptr_phi, i64 1
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%ptr2_inc = getelementptr inbounds i32, i32* %ptr2_phi, i64 1
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load i32, i32* %ptr_inc
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load i32, i32* %ptr2_inc
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br i1 %tobool, label %outer.while.backedge, label %while.body
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outer.while.backedge:
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%ptr_inc_outer = getelementptr inbounds i32, i32* %ptr_phi, i64 1
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%ptr2_inc_outer = getelementptr inbounds i32, i32* %ptr2_phi, i64 1
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load i32, i32* %ptr_inc_outer
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load i32, i32* %ptr2_inc_outer
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%dec.outer = add nsw i32 %num.outer, -1
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%br.cond = icmp eq i32 %dec.outer, 0
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br i1 %br.cond, label %the_exit, label %outer.while.header
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the_exit:
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ret i32 %add
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}
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; CHECK: test_noalias_3
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; CHECK: MayAlias: i8* %ptr2_phi, i8* %ptr_phi
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define i32 @test_noalias_3(i8* noalias %x, i8* noalias %y, i8* noalias %z,
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i32 %count) {
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entry:
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br label %while.body
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while.body:
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%num = phi i32 [ %count, %entry ], [ %dec, %while.body ]
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%ptr_phi = phi i8* [ %x, %entry ], [ %z, %while.body ]
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%ptr2_phi = phi i8* [ %y, %entry ], [ %ptr_phi, %while.body ]
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load i8, i8* %ptr_phi
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load i8, i8* %ptr2_phi
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%dec = add nsw i32 %num, -1
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%tobool = icmp eq i32 %dec, 0
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br i1 %tobool, label %the_exit, label %while.body
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the_exit:
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ret i32 1
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}
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; CHECK-LABEL: test_different_stride_noalias
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; CHECK: NoAlias: i8* %x.base, i16* %y.base
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; CHECK: NoAlias: i8* %x, i16* %y
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; CHECK: NoAlias: i8* %x.next, i16* %y.next
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define void @test_different_stride_noalias(i1 %c, i8* noalias %x.base, i16* noalias %y.base) {
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entry:
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load i8, i8* %x.base
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load i16, i16* %y.base
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br label %loop
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loop:
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%x = phi i8* [ %x.base, %entry ], [ %x.next, %loop ]
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%y = phi i16* [ %y.base, %entry ], [ %y.next, %loop ]
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load i8, i8* %x
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load i16, i16* %y
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%x.next = getelementptr i8, i8* %x, i64 1
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%y.next = getelementptr i16, i16* %y, i64 1
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load i8, i8* %x.next
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load i16, i16* %y.next
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br i1 %c, label %loop, label %exit
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exit:
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ret void
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}
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; CHECK-LABEL: test_no_loop_mustalias
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; CHECK: MustAlias: i16* %z16, i8* %z8
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define void @test_no_loop_mustalias(i1 %c, i8* noalias %x8, i8* noalias %y8) {
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br i1 %c, label %if, label %else
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if:
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%x16 = bitcast i8* %x8 to i16*
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br label %end
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else:
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%y16 = bitcast i8* %y8 to i16*
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br label %end
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end:
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%z8 = phi i8* [ %x8, %if ], [ %y8, %else ]
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%z16 = phi i16* [ %x16, %if ], [ %y16, %else ]
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load i8, i8* %z8
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load i16, i16* %z16
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ret void
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}
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; CHECK-LABEL: test_same_stride_mustalias
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; CHECK: MustAlias: i8* %x.base, i4* %y.base
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; CHECK: MayAlias: i8* %x, i4* %y
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; CHECK: MayAlias: i8* %x.next, i4* %y.next
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; TODO: (x, y) could be MustAlias
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define void @test_same_stride_mustalias(i1 %c, i8* noalias %x.base) {
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entry:
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%y.base = bitcast i8* %x.base to i4*
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load i8, i8* %x.base
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load i4, i4* %y.base
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br label %loop
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loop:
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%x = phi i8* [ %x.base, %entry ], [ %x.next, %loop ]
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%y = phi i4* [ %y.base, %entry ], [ %y.next, %loop ]
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load i8, i8* %x
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load i4, i4* %y
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%x.next = getelementptr i8, i8* %x, i64 1
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%y.next = getelementptr i4, i4* %y, i64 1
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load i8, i8* %x.next
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load i4, i4* %y.next
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br i1 %c, label %loop, label %exit
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exit:
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ret void
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}
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; CHECK-LABEL: test_different_stride_mustalias
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; CHECK: MustAlias: i8* %x.base, i16* %y.base
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; CHECK: MayAlias: i8* %x, i16* %y
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; CHECK: MayAlias: i8* %x.next, i16* %y.next
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; Even though the base pointers MustAlias, the different strides don't preserve
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; this property across iterations.
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define void @test_different_stride_mustalias(i1 %c, i8* noalias %x.base) {
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entry:
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%y.base = bitcast i8* %x.base to i16*
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load i8, i8* %x.base
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load i16, i16* %y.base
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br label %loop
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loop:
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%x = phi i8* [ %x.base, %entry ], [ %x.next, %loop ]
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%y = phi i16* [ %y.base, %entry ], [ %y.next, %loop ]
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load i8, i8* %x
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load i16, i16* %y
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%x.next = getelementptr i8, i8* %x, i64 1
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%y.next = getelementptr i16, i16* %y, i64 1
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load i8, i8* %x.next
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load i16, i16* %y.next
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br i1 %c, label %loop, label %exit
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exit:
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ret void
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}
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