| Eric Christopher | cee313d | 2019-04-17 04:52:47 +0000 | [diff] [blame] | 1 | ; RUN: opt < %s -lcssa -S | FileCheck %s |
| 2 | ; RUN: opt < %s -passes=lcssa -S | FileCheck %s |
| 3 | |
| 4 | declare i1 @c1() |
| 5 | |
| 6 | declare i1 @c2() |
| 7 | |
| 8 | define i32 @foo() { |
| 9 | ; CHECK-LABEL: @foo |
| 10 | entry: |
| 11 | br label %loop_begin |
| 12 | loop_begin: ; preds = %loop_body.2, %entry |
| 13 | br i1 true, label %loop_body.1, label %loop_exit2 |
| 14 | loop_body.1: ; preds = %loop_begin |
| 15 | %X.1 = add i32 0, 1 ; <i32> [#uses=1] |
| 16 | %rel.1 = call i1 @c1( ) ; <i1> [#uses=1] |
| 17 | br i1 %rel.1, label %loop_exit, label %loop_body.2 |
| 18 | loop_body.2: ; preds = %loop_body.1 |
| 19 | %rel.2 = call i1 @c2( ) ; <i1> [#uses=1] |
| 20 | br i1 %rel.2, label %loop_exit, label %loop_begin |
| 21 | loop_exit: ; preds = %loop_body.2, %loop_body.1 |
| 22 | ; CHECK: %X.1.lcssa = phi |
| 23 | ret i32 %X.1 |
| 24 | loop_exit2: ; preds = %loop_begin |
| 25 | ret i32 1 |
| 26 | ; CHECK-NOT: %X.1.lcssa1 |
| 27 | } |
| 28 | |