1 ; RUN: opt -codegenprepare -S < %s | FileCheck %s 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 6 ; CHECK-LABEL: @test1( 7 ; objectsize should fold to a constant, which causes the branch to fold to an 8 ; uncond branch. Next, we fold the control flow alltogether. 9 ; rdar://8785296 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 16 ; CHECK: T: 17 ; CHECK-NOT: br label % 18 19 trap: ; preds = %0, %entry 20 tail call void @llvm.trap() noreturn nounwind 21 unreachable 22 23 T: 24 ; CHECK: ret i32 4 25 ret i32 4 26 } 27 28 declare i64 @llvm.objectsize.i64(i8*, i1) nounwind readonly 29 30 declare void @llvm.trap() nounwind 31
