| ; RUN: opt < %s -simplifycfg -S | FileCheck %s | |
| ; Check that we can get rid of empty block leading to header | |
| ; if it does not introduce new edge. | |
| define i32 @test(i32 %c) { | |
| entry: | |
| br label %header | |
| header: | |
| %i = phi i32 [0, %entry], [%i.1, %backedge] | |
| %i.1 = add i32 %i, 1 | |
| %cmp = icmp slt i32 %i.1, %c | |
| br i1 %cmp, label %backedge, label %exit | |
| ; CHECK-NOT: backedge: | |
| backedge: | |
| br label %header | |
| exit: | |
| ret i32 %i | |
| } |