1*9880d681SAndroid Build Coastguard Worker; RUN: opt < %s -gvn -S | FileCheck %s 2*9880d681SAndroid Build Coastguard Worker 3*9880d681SAndroid Build Coastguard Workertarget datalayout = "e-p:32:32:32-i1:8:32-i8:8:32-i16:16:32-i32:32:32-i64:32:32-f32:32:32-f64:32:32-v64:64:64-v128:128:128-a0:0:32-n32" 4*9880d681SAndroid Build Coastguard Worker 5*9880d681SAndroid Build Coastguard Worker@p = external global i32 6*9880d681SAndroid Build Coastguard Worker 7*9880d681SAndroid Build Coastguard Workerdefine i32 @test(i32 %n) nounwind { 8*9880d681SAndroid Build Coastguard Worker; CHECK-LABEL: @test( 9*9880d681SAndroid Build Coastguard Workerentry: 10*9880d681SAndroid Build Coastguard Worker br label %for.cond 11*9880d681SAndroid Build Coastguard Worker 12*9880d681SAndroid Build Coastguard Worker; loads aligned greater than the memory should not be moved past conditionals 13*9880d681SAndroid Build Coastguard Worker; CHECK-NOT: load 14*9880d681SAndroid Build Coastguard Worker; CHECK: br i1 15*9880d681SAndroid Build Coastguard Worker 16*9880d681SAndroid Build Coastguard Workerfor.cond: 17*9880d681SAndroid Build Coastguard Worker %i.0 = phi i32 [ 0, %entry ], [ %indvar.next, %for.inc ] 18*9880d681SAndroid Build Coastguard Worker %cmp = icmp slt i32 %i.0, %n 19*9880d681SAndroid Build Coastguard Worker br i1 %cmp, label %for.body, label %for.cond.for.end_crit_edge 20*9880d681SAndroid Build Coastguard Worker 21*9880d681SAndroid Build Coastguard Workerfor.cond.for.end_crit_edge: 22*9880d681SAndroid Build Coastguard Worker; ...but PRE can still move the load out of for.end to here. 23*9880d681SAndroid Build Coastguard Worker; CHECK: for.cond.for.end_crit_edge: 24*9880d681SAndroid Build Coastguard Worker; CHECK-NEXT: load 25*9880d681SAndroid Build Coastguard Worker br label %for.end 26*9880d681SAndroid Build Coastguard Worker 27*9880d681SAndroid Build Coastguard Workerfor.body: 28*9880d681SAndroid Build Coastguard Worker %tmp3 = load i32, i32* @p, align 8 29*9880d681SAndroid Build Coastguard Worker %dec = add i32 %tmp3, -1 30*9880d681SAndroid Build Coastguard Worker store i32 %dec, i32* @p 31*9880d681SAndroid Build Coastguard Worker %cmp6 = icmp slt i32 %dec, 0 32*9880d681SAndroid Build Coastguard Worker br i1 %cmp6, label %for.body.for.end_crit_edge, label %for.inc 33*9880d681SAndroid Build Coastguard Worker 34*9880d681SAndroid Build Coastguard Workerfor.body.for.end_crit_edge: 35*9880d681SAndroid Build Coastguard Worker br label %for.end 36*9880d681SAndroid Build Coastguard Worker 37*9880d681SAndroid Build Coastguard Workerfor.inc: 38*9880d681SAndroid Build Coastguard Worker %indvar.next = add i32 %i.0, 1 39*9880d681SAndroid Build Coastguard Worker br label %for.cond 40*9880d681SAndroid Build Coastguard Worker 41*9880d681SAndroid Build Coastguard Workerfor.end: 42*9880d681SAndroid Build Coastguard Worker %tmp9 = load i32, i32* @p, align 8 43*9880d681SAndroid Build Coastguard Worker ret i32 %tmp9 44*9880d681SAndroid Build Coastguard Worker} 45