| Dmitri Gribenko | b137c9e | 2012-12-30 01:28:40 +0000 | [diff] [blame] | 1 | ; RUN: opt -codegenprepare -S < %s | FileCheck %s |
| Chris Lattner | 1b93be5 | 2011-01-15 07:25:29 +0000 | [diff] [blame] | 2 | |
| 3 | target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64" |
| 4 | target triple = "x86_64-apple-darwin10.0.0" |
| 5 | |
| Stephen Lin | c1c7a13 | 2013-07-14 01:42:54 +0000 | [diff] [blame^] | 6 | ; CHECK-LABEL: @test1( |
| Chris Lattner | 8df83c4 | 2011-01-15 07:36:13 +0000 | [diff] [blame] | 7 | ; objectsize should fold to a constant, which causes the branch to fold to an |
| Nadav Rotem | 7040999 | 2012-08-14 05:19:07 +0000 | [diff] [blame] | 8 | ; uncond branch. Next, we fold the control flow alltogether. |
| Chris Lattner | 8df83c4 | 2011-01-15 07:36:13 +0000 | [diff] [blame] | 9 | ; rdar://8785296 |
| Chris Lattner | 1b93be5 | 2011-01-15 07:25:29 +0000 | [diff] [blame] | 10 | define i32 @test1(i8* %ptr) nounwind ssp noredzone align 2 { |
| 11 | entry: |
| 12 | %0 = tail call i64 @llvm.objectsize.i64(i8* %ptr, i1 false) |
| 13 | %1 = icmp ugt i64 %0, 3 |
| 14 | br i1 %1, label %T, label %trap |
| 15 | |
| Nadav Rotem | 7040999 | 2012-08-14 05:19:07 +0000 | [diff] [blame] | 16 | ; CHECK: T: |
| 17 | ; CHECK-NOT: br label % |
| Chris Lattner | af26390 | 2011-01-15 07:51:19 +0000 | [diff] [blame] | 18 | |
| Chris Lattner | 1b93be5 | 2011-01-15 07:25:29 +0000 | [diff] [blame] | 19 | trap: ; preds = %0, %entry |
| 20 | tail call void @llvm.trap() noreturn nounwind |
| 21 | unreachable |
| 22 | |
| 23 | T: |
| Cameron Zwarich | 338d362 | 2011-03-11 21:52:04 +0000 | [diff] [blame] | 24 | ; CHECK: ret i32 4 |
| Chris Lattner | 1b93be5 | 2011-01-15 07:25:29 +0000 | [diff] [blame] | 25 | ret i32 4 |
| 26 | } |
| 27 | |
| 28 | declare i64 @llvm.objectsize.i64(i8*, i1) nounwind readonly |
| 29 | |
| 30 | declare void @llvm.trap() nounwind |