| ; RUN: opt < %s -basic-aa -aa-eval -print-all-alias-modref-info -disable-output 2>&1 | FileCheck %s |
| |
| ; BasicAA should detect NoAliases in PHIs and Selects. |
| |
| ; CHECK: Function: foo |
| ; CHECK: NoAlias: double* %a, double* %b |
| ; CHECK: Function: bar |
| ; CHECK: NoAlias: double* %a, double* %b |
| ; CHECK: Function: qux |
| ; CHECK: NoAlias: double* %a, double* %b |
| ; CHECK: Function: fin |
| ; CHECK: NoAlias: double* %a, double* %b |
| ; CHECK: ===== Alias Analysis Evaluator Report ===== |
| |
| ; Two PHIs in the same block. |
| define void @foo(i1 %m, double* noalias %x, double* noalias %y) { |
| entry: |
| br i1 %m, label %true, label %false |
| |
| true: |
| br label %exit |
| |
| false: |
| br label %exit |
| |
| exit: |
| %a = phi double* [ %x, %true ], [ %y, %false ] |
| %b = phi double* [ %x, %false ], [ %y, %true ] |
| store volatile double 0.0, double* %a |
| store volatile double 1.0, double* %b |
| ret void |
| } |
| |
| ; Two selects with the same condition. |
| define void @bar(i1 %m, double* noalias %x, double* noalias %y) { |
| entry: |
| %a = select i1 %m, double* %x, double* %y |
| %b = select i1 %m, double* %y, double* %x |
| store volatile double 0.000000e+00, double* %a |
| store volatile double 1.000000e+00, double* %b |
| ret void |
| } |
| |
| ; Two PHIs with disjoint sets of inputs. |
| define void @qux(i1 %m, double* noalias %x, double* noalias %y, |
| i1 %n, double* noalias %v, double* noalias %w) { |
| entry: |
| br i1 %m, label %true, label %false |
| |
| true: |
| br label %exit |
| |
| false: |
| br label %exit |
| |
| exit: |
| %a = phi double* [ %x, %true ], [ %y, %false ] |
| br i1 %n, label %ntrue, label %nfalse |
| |
| ntrue: |
| br label %nexit |
| |
| nfalse: |
| br label %nexit |
| |
| nexit: |
| %b = phi double* [ %v, %ntrue ], [ %w, %nfalse ] |
| store volatile double 0.0, double* %a |
| store volatile double 1.0, double* %b |
| ret void |
| } |
| |
| ; Two selects with disjoint sets of arms. |
| define void @fin(i1 %m, double* noalias %x, double* noalias %y, |
| i1 %n, double* noalias %v, double* noalias %w) { |
| entry: |
| %a = select i1 %m, double* %x, double* %y |
| %b = select i1 %n, double* %v, double* %w |
| store volatile double 0.000000e+00, double* %a |
| store volatile double 1.000000e+00, double* %b |
| ret void |
| } |