| ; The loop canonicalization pass should guarantee that there is one backedge |
| ; for all loops. This allows the -indvars pass to recognize the %IV |
| ; induction variable in this testcase. |
| |
| ; RUN: opt < %s -indvars -S | FileCheck %s |
| ; CHECK: Loop.backedge: |
| ; CHECK-NOT: br |
| ; CHECK: br label %Loop |
| |
| define i32 @test(i1 %C) { |
| ; <label>:0 |
| br label %Loop |
| Loop: ; preds = %BE2, %BE1, %0 |
| %IV = phi i32 [ 1, %0 ], [ %IV2, %BE1 ], [ %IV2, %BE2 ] ; <i32> [#uses=2] |
| store i32 %IV, i32* null |
| %IV2 = add i32 %IV, 2 ; <i32> [#uses=2] |
| br i1 %C, label %BE1, label %BE2 |
| BE1: ; preds = %Loop |
| br label %Loop |
| BE2: ; preds = %Loop |
| br label %Loop |
| } |
| |
