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| ; RUN: opt -loop-simplify -S < %s | FileCheck %s
; CHECK-LABEL: @test1
define void @test1(i32 %n) {
entry:
br label %while.cond
while.cond: ; preds = %if.then, %if.else, %entry
%count.0 = phi i32 [ 0, %entry ], [ %add, %if.then ], [ %add2, %if.else ]
%cmp = icmp ugt i32 %count.0, %n
br i1 %cmp, label %while.end, label %while.body
while.body: ; preds = %while.cond
%rem = and i32 %count.0, 1
%cmp1 = icmp eq i32 %rem, 0
br i1 %cmp1, label %if.then, label %if.else
if.then: ; preds = %while.body
%add = add i32 %count.0, 1
br label %while.cond, !llvm.loop !0
if.else: ; preds = %while.body
%add2 = add i32 %count.0, 2
br label %while.cond, !llvm.loop !0
while.end: ; preds = %while.cond
ret void
}
; CHECK: if.then
; CHECK-NOT: br {{.*}}!llvm.loop{{.*}}
; CHECK: while.cond.backedge:
; CHECK: br label %while.cond, !llvm.loop !0
; CHECK: if.else
; CHECK-NOT: br {{.*}}!llvm.loop{{.*}}
; CHECK-LABEL: @test2
; CHECK: for.body:
; CHECK: br i1 %{{.*}}, label %for.body, label %cleanup.loopexit, !llvm.loop !0
define void @test2(i32 %k) {
entry:
%cmp9 = icmp sgt i32 %k, 0
br i1 %cmp9, label %for.body.preheader, label %cleanup
for.body.preheader: ; preds = %entry
br label %for.body
for.cond: ; preds = %for.body
%cmp = icmp slt i32 %inc, %k
br i1 %cmp, label %for.body, label %cleanup.loopexit, !llvm.loop !0
for.body: ; preds = %for.body.preheader, %for.cond
%i.010 = phi i32 [ %inc, %for.cond ], [ 0, %for.body.preheader ]
%cmp3 = icmp sgt i32 %i.010, 3
%inc = add nsw i32 %i.010, 1
br i1 %cmp3, label %cleanup.loopexit, label %for.cond
cleanup.loopexit: ; preds = %for.body, %for.cond
br label %cleanup
cleanup: ; preds = %cleanup.loopexit, %entry
ret void
}
!0 = distinct !{!0, !1}
!1 = !{!"llvm.loop.distribute.enable", i1 true}
; CHECK: !0 = distinct !{!0, !1}
; CHECK: !1 = !{!"llvm.loop.distribute.enable", i1 true}
|