| ; RUN: opt < %s -basicaa -licm -S | FileCheck %s |
| ; RUN: opt -aa-pipeline=basic-aa -passes='require<aa>,require<targetir>,require<scalar-evolution>,require<opt-remark-emit>,loop(licm)' -S %s | FileCheck %s |
| |
| target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128" |
| target triple = "x86_64-unknown-linux-gnu" |
| |
| ; Make sure we don't hoist the store out of the loop; %a would |
| ; have the wrong value if f() unwinds |
| |
| define void @test1(i32* nocapture noalias %a, i1 zeroext %y) uwtable { |
| entry: |
| br label %for.body |
| |
| for.body: |
| %i.03 = phi i32 [ 0, %entry ], [ %inc, %for.inc ] |
| %0 = load i32, i32* %a, align 4 |
| %add = add nsw i32 %0, 1 |
| store i32 %add, i32* %a, align 4 |
| br i1 %y, label %if.then, label %for.inc |
| |
| ; CHECK: define void @test1 |
| ; CHECK: load i32, i32* |
| ; CHECK-NEXT: add |
| ; CHECK-NEXT: store i32 |
| |
| if.then: |
| tail call void @f() |
| br label %for.inc |
| |
| for.inc: |
| %inc = add nuw nsw i32 %i.03, 1 |
| %exitcond = icmp eq i32 %inc, 10000 |
| br i1 %exitcond, label %for.cond.cleanup, label %for.body |
| |
| for.cond.cleanup: |
| ret void |
| } |
| |
| ; We can hoist the store out of the loop here; if f() unwinds, |
| ; the lifetime of %a ends. |
| |
| define void @test2(i1 zeroext %y) uwtable { |
| entry: |
| %a = alloca i32 |
| br label %for.body |
| |
| for.body: |
| %i.03 = phi i32 [ 0, %entry ], [ %inc, %for.inc ] |
| %0 = load i32, i32* %a, align 4 |
| %add = add nsw i32 %0, 1 |
| store i32 %add, i32* %a, align 4 |
| br i1 %y, label %if.then, label %for.inc |
| |
| if.then: |
| tail call void @f() |
| br label %for.inc |
| |
| for.inc: |
| %inc = add nuw nsw i32 %i.03, 1 |
| %exitcond = icmp eq i32 %inc, 10000 |
| br i1 %exitcond, label %for.cond.cleanup, label %for.body |
| |
| for.cond.cleanup: |
| ret void |
| |
| ; CHECK: define void @test2 |
| ; CHECK: store i32 |
| ; CHECK-NEXT: ret void |
| ret void |
| } |
| |
| declare void @f() uwtable |