forked from OSchip/llvm-project
74 lines
1.8 KiB
LLVM
74 lines
1.8 KiB
LLVM
; RUN: opt < %s -basicaa -aa-eval -print-all-alias-modref-info -disable-output \
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; RUN: |& grep {NoAlias: double\\* \[%\]a, double\\* \[%\]b\$} | count 4
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; BasicAA should detect NoAliases in PHIs and Selects.
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; Two PHIs in the same block.
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define void @foo(i1 %m, double* noalias %x, double* noalias %y) {
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entry:
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br i1 %m, label %true, label %false
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true:
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br label %exit
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false:
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br label %exit
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exit:
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%a = phi double* [ %x, %true ], [ %y, %false ]
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%b = phi double* [ %x, %false ], [ %y, %true ]
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volatile store double 0.0, double* %a
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volatile store double 1.0, double* %b
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ret void
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}
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; Two selects with the same condition.
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define void @bar(i1 %m, double* noalias %x, double* noalias %y) {
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entry:
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%a = select i1 %m, double* %x, double* %y
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%b = select i1 %m, double* %y, double* %x
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volatile store double 0.000000e+00, double* %a
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volatile store double 1.000000e+00, double* %b
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ret void
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}
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; Two PHIs with disjoint sets of inputs.
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define void @qux(i1 %m, double* noalias %x, double* noalias %y,
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i1 %n, double* noalias %v, double* noalias %w) {
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entry:
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br i1 %m, label %true, label %false
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true:
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br label %exit
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false:
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br label %exit
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exit:
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%a = phi double* [ %x, %true ], [ %y, %false ]
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br i1 %n, label %ntrue, label %nfalse
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ntrue:
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br label %nexit
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nfalse:
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br label %nexit
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nexit:
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%b = phi double* [ %v, %ntrue ], [ %w, %nfalse ]
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volatile store double 0.0, double* %a
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volatile store double 1.0, double* %b
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ret void
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}
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; Two selects with disjoint sets of arms.
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define void @fin(i1 %m, double* noalias %x, double* noalias %y,
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i1 %n, double* noalias %v, double* noalias %w) {
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entry:
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%a = select i1 %m, double* %x, double* %y
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%b = select i1 %n, double* %v, double* %w
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volatile store double 0.000000e+00, double* %a
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volatile store double 1.000000e+00, double* %b
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ret void
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}
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