| ; RUN: opt -S -passes=loop-rotate -verify-memoryssa < %s | FileCheck %s |
| |
| @e = global i32 10 |
| |
| declare void @f1(i32) convergent |
| declare void @f2(i32) |
| |
| ; The call to f1 in the loop header shouldn't be duplicated (meaning, loop |
| ; rotation shouldn't occur), because f1 is convergent. |
| |
| ; CHECK: call void @f1 |
| ; CHECK-NOT: call void @f1 |
| |
| define void @test(i32 %x) { |
| entry: |
| br label %loop |
| |
| loop: |
| %n.phi = phi i32 [ %n, %loop.fin ], [ 0, %entry ] |
| call void @f1(i32 %n.phi) |
| %cond = icmp eq i32 %n.phi, %x |
| br i1 %cond, label %exit, label %loop.fin |
| |
| loop.fin: |
| %n = add i32 %n.phi, 1 |
| call void @f2(i32 %n) |
| br label %loop |
| |
| exit: |
| ret void |
| } |