96 lines
2.4 KiB
LLVM
96 lines
2.4 KiB
LLVM
; RUN: opt < %s -passes=aa-eval -print-all-alias-modref-info 2>&1 | FileCheck %s
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@c = constant [8 x i32] zeroinitializer
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declare void @dummy()
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declare void @foo(ptr)
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; CHECK-LABEL: Function: basic
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; CHECK: NoModRef: Ptr: i32* @c <-> call void @dummy()
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define void @basic(ptr %p) {
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call void @dummy()
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load i32, ptr @c
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ret void
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}
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; CHECK-LABEL: Function: recphi
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; CHECK: NoModRef: Ptr: i32* %p <-> call void @dummy()
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define void @recphi() {
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entry:
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br label %loop
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loop:
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%p = phi ptr [ @c, %entry ], [ %p.next, %loop ]
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call void @dummy()
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load i32, ptr %p
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%p.next = getelementptr i32, ptr %p, i64 1
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%c = icmp ne ptr %p.next, getelementptr (i32, ptr @c, i64 8)
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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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; Tests that readonly noalias implies !Mod.
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;
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; CHECK-LABEL: Function: readonly_noalias
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; CHECK: Just Ref: Ptr: i32* %p <-> call void @foo(ptr %p)
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define void @readonly_noalias(ptr readonly noalias %p) {
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call void @foo(ptr %p)
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load i32, ptr %p
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ret void
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}
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; Tests that readnone noalias implies !Mod.
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;
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; CHECK-LABEL: Function: readnone_noalias
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; CHECK: Just Ref: Ptr: i32* %p <-> call void @foo(ptr %p)
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define void @readnone_noalias(ptr readnone noalias %p) {
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call void @foo(ptr %p)
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load i32, ptr %p
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ret void
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}
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; Tests that writeonly noalias doesn't imply !Ref (since it's still possible
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; to read from the object through other pointers if the pointer wasn't
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; written).
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;
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; CHECK-LABEL: Function: writeonly_noalias
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; CHECK: Both ModRef: Ptr: i32* %p <-> call void @foo(ptr %p)
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define void @writeonly_noalias(ptr writeonly noalias %p) {
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call void @foo(ptr %p)
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load i32, ptr %p
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ret void
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}
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; Tests that readonly doesn't imply !Mod without noalias.
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;
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; CHECK-LABEL: Function: just_readonly
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; CHECK: Both ModRef: Ptr: i32* %p <-> call void @foo(ptr %p)
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define void @just_readonly(ptr readonly %p) {
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call void @foo(ptr %p)
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load i32, ptr %p
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ret void
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}
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; Tests that readnone doesn't imply !Mod without noalias.
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;
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; CHECK-LABEL: Function: just_readnone
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; CHECK: Both ModRef: Ptr: i32* %p <-> call void @foo(ptr %p)
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define void @just_readnone(ptr readnone %p) {
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call void @foo(ptr %p)
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load i32, ptr %p
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ret void
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}
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; Tests that writeonly doesn't imply !Ref.
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;
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; CHECK-LABEL: Function: just_writeonly
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; CHECK: Both ModRef: Ptr: i32* %p <-> call void @foo(ptr %p)
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define void @just_writeonly(ptr writeonly %p) {
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call void @foo(ptr %p)
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load i32, ptr %p
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ret void
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}
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