1; RUN: opt < %s -aa-pipeline=basic-aa,globals-aa -passes='function(instcombine),require<globals-aa>,function(invalidate<aa>,loop-mssa(licm))' -S | FileCheck %s 2 3; Make sure -globals-aa ignores dead uses of globals. 4 5@a = internal global i32 0, align 4 6@c = common global i32 0, align 4 7 8; Function Attrs: nounwind 9define i32 @g() { 10; Make sure the load of @a is hoisted. 11; CHECK-LABEL: define i32 @g() 12; CHECK: entry: 13; CHECK-NEXT: load i32, ptr @a, align 4 14; CHECK-NEXT: br label %for.cond 15entry: 16 br label %for.cond 17 18for.cond: ; preds = %for.inc, %entry 19 %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ] 20 %sum.0 = phi i32 [ 0, %entry ], [ %add, %for.inc ] 21 %cmp = icmp slt i32 %i.0, 1000 22 br i1 %cmp, label %for.body, label %for.end 23 24for.body: ; preds = %for.cond 25 %0 = load i32, ptr @a, align 4 26 %add = add nsw i32 %sum.0, %0 27 call void @f() 28 br label %for.inc 29 30for.inc: ; preds = %for.body 31 %inc = add nsw i32 %i.0, 1 32 br label %for.cond 33 34for.end: ; preds = %for.cond 35 ret i32 %sum.0 36} 37 38; Function Attrs: nounwind 39define internal void @f() { 40entry: 41 %tobool = icmp ne i32 0, 0 42 br i1 %tobool, label %if.then, label %if.end 43 44if.then: ; preds = %entry 45 store i32 ptrtoint (ptr @a to i32), ptr @c, align 4 46 br label %if.end 47 48if.end: ; preds = %if.then, %entry 49 %0 = load i32, ptr @c, align 4 50 %inc = add nsw i32 %0, 1 51 store i32 %inc, ptr @c, align 4 52 ret void 53} 54 55