| David Majnemer | 0856653 | 2016-09-16 02:43:36 +0000 | [diff] [blame] | 1 | ; RUN: opt -S -simplifycfg < %s | FileCheck %s |
| 2 | target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| 3 | target triple = "x86_64-unknown-linux-gnu" |
| 4 | |
| 5 | declare i32* @fn1(i32* returned) |
| 6 | |
| 7 | define i32 @test1(i1 %B) { |
| 8 | entry: |
| 9 | br label %for.cond.us |
| 10 | |
| 11 | for.cond.us: ; preds = %for.cond.us, %entry |
| 12 | br i1 %B, label %for.cond4.preheader, label %for.cond.us |
| 13 | |
| 14 | for.cond4.preheader: ; preds = %for.cond.us |
| 15 | br i1 %B, label %for.cond4.preheader.split.us, label %for.cond4 |
| 16 | |
| 17 | for.cond4.preheader.split.us: ; preds = %for.cond4.preheader |
| 18 | unreachable |
| 19 | |
| 20 | for.cond4: ; preds = %for.end, %for.cond4.preheader |
| 21 | %phi = phi i32* [ %call, %for.end ], [ undef, %for.cond4.preheader ] |
| 22 | %call = call i32* @fn1(i32* %phi) |
| 23 | br label %for.cond5 |
| 24 | |
| 25 | for.cond5: ; preds = %for.cond5, %for.cond4 |
| 26 | br i1 %B, label %for.cond5, label %for.end |
| 27 | |
| 28 | for.end: ; preds = %for.cond5 |
| 29 | %load = load i32, i32* %call, align 4 |
| 30 | br label %for.cond4 |
| 31 | } |
| 32 | |
| 33 | ; CHECK-LABEL: define i32 @test1( |
| 34 | ; CHECK: br label %[[LABEL:.*]] |
| 35 | ; CHECK: [[LABEL]]: |
| 36 | ; CHECK: br label %[[LABEL]] |