1; RUN: opt < %s -basicaa -licm -S | FileCheck %s 2; RUN: opt -aa-pipeline=basic-aa -passes='require<aa>,require<targetir>,require<scalar-evolution>,loop(licm)' -S %s | FileCheck %s 3 4target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 5target triple = "x86_64-unknown-linux-gnu" 6 7; Make sure we don't hoist the store out of the loop; %a would 8; have the wrong value if f() unwinds 9 10define void @test1(i32* nocapture noalias %a, i1 zeroext %y) uwtable { 11entry: 12 br label %for.body 13 14for.body: 15 %i.03 = phi i32 [ 0, %entry ], [ %inc, %for.inc ] 16 %0 = load i32, i32* %a, align 4 17 %add = add nsw i32 %0, 1 18 store i32 %add, i32* %a, align 4 19 br i1 %y, label %if.then, label %for.inc 20 21; CHECK: define void @test1 22; CHECK: load i32, i32* 23; CHECK-NEXT: add 24; CHECK-NEXT: store i32 25 26if.then: 27 tail call void @f() 28 br label %for.inc 29 30for.inc: 31 %inc = add nuw nsw i32 %i.03, 1 32 %exitcond = icmp eq i32 %inc, 10000 33 br i1 %exitcond, label %for.cond.cleanup, label %for.body 34 35for.cond.cleanup: 36 ret void 37} 38 39; We can hoist the store out of the loop here; if f() unwinds, 40; the lifetime of %a ends. 41 42define void @test2(i1 zeroext %y) uwtable { 43entry: 44 %a = alloca i32 45 br label %for.body 46 47for.body: 48 %i.03 = phi i32 [ 0, %entry ], [ %inc, %for.inc ] 49 %0 = load i32, i32* %a, align 4 50 %add = add nsw i32 %0, 1 51 store i32 %add, i32* %a, align 4 52 br i1 %y, label %if.then, label %for.inc 53 54if.then: 55 tail call void @f() 56 br label %for.inc 57 58for.inc: 59 %inc = add nuw nsw i32 %i.03, 1 60 %exitcond = icmp eq i32 %inc, 10000 61 br i1 %exitcond, label %for.cond.cleanup, label %for.body 62 63for.cond.cleanup: 64 ret void 65 66; CHECK: define void @test2 67; CHECK: store i32 68; CHECK-NEXT: ret void 69 ret void 70} 71 72declare void @f() uwtable 73