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; RUN: opt -S -passes=irce -irce-print-changed-loops=true < %s | FileCheck %s
; RUN: opt -S -passes='require<branch-prob>,irce' -irce-print-changed-loops=true < %s | FileCheck %s
; CHECK-NOT: irce
define void @bad_loop_structure_increasing(i64 %iv.start) {
entry:
br label %for.body
for.body:
%indvars.iv = phi i64 [ %iv.start, %entry ], [ %indvars.iv.next, %for.inc ]
%cmp = icmp ult i64 %indvars.iv, 100
br i1 %cmp, label %switch.lookup, label %for.inc
switch.lookup:
br label %for.inc
for.inc:
%indvars.iv.next = add nuw nsw i64 %indvars.iv, 1
%cmp55 = icmp slt i64 %indvars.iv.next, 11
br i1 %cmp55, label %for.body, label %for.end
for.end:
ret void
}
define void @bad_loop_structure_decreasing(i64 %iv.start) {
entry:
br label %for.body
for.body:
%indvars.iv = phi i64 [ %iv.start, %entry ], [ %indvars.iv.next, %for.inc ]
%cmp = icmp ult i64 %indvars.iv, 100
br i1 %cmp, label %switch.lookup, label %for.inc
switch.lookup:
br label %for.inc
for.inc:
%indvars.iv.next = add nuw nsw i64 %indvars.iv, -1
%cmp55 = icmp sgt i64 %indvars.iv.next, 11
br i1 %cmp55, label %for.body, label %for.end
for.end:
ret void
}
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