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 4 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" 5 target 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 10 define void @test1(i32* nocapture noalias %a, i1 zeroext %y) uwtable { 11 entry: 12 br label %for.body 13 14 for.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 26 if.then: 27 tail call void @f() 28 br label %for.inc 29 30 for.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 35 for.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 42 define void @test2(i1 zeroext %y) uwtable { 43 entry: 44 %a = alloca i32 45 br label %for.body 46 47 for.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 54 if.then: 55 tail call void @f() 56 br label %for.inc 57 58 for.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 63 for.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 72 declare void @f() uwtable 73
