| ; RUN: opt < %s -instcombine -globals-aa -licm -enable-new-pm=0 -S | FileCheck %s |
| ; RUN: opt < %s -aa-pipeline=basic-aa,globals-aa -passes='function(instcombine),require<globals-aa>,function(invalidate<aa>,loop(licm))' -S | FileCheck %s |
| |
| ; Make sure -globals-aa ignores dead uses of globals. |
| |
| @a = internal global i32 0, align 4 |
| @c = common global i32 0, align 4 |
| |
| ; Function Attrs: nounwind |
| define i32 @g() { |
| ; Make sure the load of @a is hoisted. |
| ; CHECK-LABEL: define i32 @g() |
| ; CHECK: entry: |
| ; CHECK-NEXT: load i32, i32* @a, align 4 |
| ; CHECK-NEXT: br label %for.cond |
| entry: |
| br label %for.cond |
| |
| for.cond: ; preds = %for.inc, %entry |
| %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.inc ] |
| %sum.0 = phi i32 [ 0, %entry ], [ %add, %for.inc ] |
| %cmp = icmp slt i32 %i.0, 1000 |
| br i1 %cmp, label %for.body, label %for.end |
| |
| for.body: ; preds = %for.cond |
| %0 = load i32, i32* @a, align 4 |
| %add = add nsw i32 %sum.0, %0 |
| call void @f() |
| br label %for.inc |
| |
| for.inc: ; preds = %for.body |
| %inc = add nsw i32 %i.0, 1 |
| br label %for.cond |
| |
| for.end: ; preds = %for.cond |
| ret i32 %sum.0 |
| } |
| |
| ; Function Attrs: nounwind |
| define internal void @f() { |
| entry: |
| %tobool = icmp ne i32 0, 0 |
| br i1 %tobool, label %if.then, label %if.end |
| |
| if.then: ; preds = %entry |
| store i32 ptrtoint (i32* @a to i32), i32* @c, align 4 |
| br label %if.end |
| |
| if.end: ; preds = %if.then, %entry |
| %0 = load i32, i32* @c, align 4 |
| %inc = add nsw i32 %0, 1 |
| store i32 %inc, i32* @c, align 4 |
| ret void |
| } |
| |