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; RUN: opt -S -loop-rotate < %s | FileCheck %s
; RUN: opt -S -loop-rotate -enable-mssa-loop-dependency=true -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
}
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