forked from OSchip/llvm-project
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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