| Eric Christopher | cee313d | 2019-04-17 04:52:47 +0000 | [diff] [blame] | 1 | ; THis testcase caused an assertion failure because a PHI node did not have |
| 2 | ; entries for it's postdominator. But I think this can only happen when the |
| 3 | ; PHI node is dead, so we just avoid patching up dead PHI nodes. |
| 4 | |
| 5 | ; RUN: opt < %s -adce -S | FileCheck %s |
| 6 | ; RUN: opt < %s -adce -adce-remove-loops -S | FileCheck %s |
| 7 | |
| 8 | target datalayout = "e-p:32:32" |
| 9 | |
| 10 | define void @dead_test8() { |
| 11 | entry: |
| 12 | br label %loopentry |
| 13 | |
| 14 | loopentry: ; preds = %endif, %entry |
| 15 | %k.1 = phi i32 [ %k.0, %endif ], [ 0, %entry ] ; <i32> [#uses=1] |
| 16 | br i1 false, label %no_exit, label %return |
| 17 | |
| 18 | no_exit: ; preds = %loopentry |
| 19 | ; CHECK: br label %then |
| 20 | br i1 false, label %then, label %else |
| 21 | |
| 22 | then: ; preds = %no_exit |
| 23 | br label %endif |
| 24 | |
| 25 | else: ; preds = %no_exit |
| 26 | %dec = add i32 %k.1, -1 ; <i32> [#uses=1] |
| 27 | br label %endif |
| 28 | |
| 29 | endif: ; preds = %else, %then |
| 30 | %k.0 = phi i32 [ %dec, %else ], [ 0, %then ] ; <i32> [#uses=1] |
| 31 | store i32 2, i32* null |
| 32 | br label %loopentry |
| 33 | |
| 34 | return: ; preds = %loopentry |
| 35 | ret void |
| 36 | } |
| 37 | |