| ; 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 | |
| } |