1; RUN: llc < %s -mtriple=thumbv7-apple-ios -arm-atomic-cfg-tidy=0 | FileCheck %s
2
3; If ARMBaseInstrInfo::AnalyzeBlocks returns the wrong value, which was possible
4; for blocks with indirect branches, the IfConverter could end up deleting
5; blocks that were the destinations of indirect branches, leaving branches to
6; nowhere.
7; <rdar://problem/14464830>
8
9define i32 @preserve_blocks(i32 %x) {
10; preserve_blocks:
11; CHECK: Block address taken
12; CHECK: movs r0, #2
13; CHECK: movs r0, #1
14; CHECK-NOT: Address of block that was removed by CodeGen
15entry:
16  %c2 = icmp slt i32 %x, 3
17  %blockaddr = select i1 %c2, i8* blockaddress(@preserve_blocks, %ibt1), i8* blockaddress(@preserve_blocks, %ibt2)
18  %c1 = icmp eq i32 %x, 0
19  br i1 %c1, label %pre_ib, label %nextblock
20
21nextblock:
22  ret i32 3
23
24ibt1:
25  ret i32 2
26
27ibt2:
28  ret i32 1
29
30pre_ib:
31  indirectbr i8* %blockaddr, [ label %ibt1, label %ibt2 ]
32}
33