Test Failure: Transforms/LoopUnroll/runtime-loop-multiple-exits.ll

Test source: git

Log:

Source: <stdin>

----------------------------------------
define void @test1(i64 %trip, i1 %cond) {
%entry:
  br label %loop_header

%loop_header:
  %iv = phi i64 [ 0, %entry ], [ %iv_next, %loop_latch ]
  br i1 %cond, label %loop_latch, label %loop_exiting_bb1

%loop_exiting_bb1:
  br i1 0, label %loop_exiting_bb2, label %exit1

%loop_exiting_bb2:
  br i1 0, label %loop_latch, label %exit3

%loop_latch:
  %iv_next = add i64 %iv, 1
  %cmp = icmp ne i64 %iv_next, %trip
  br i1 %cmp, label %loop_header, label %exit2.loopexit

%exit2.loopexit:
  ret void

%exit3:
  ret void

%exit1:
  ret void
}
=>
define void @test1(i64 %trip, i1 %cond) {
%entry:
  %0 = add i64 %trip, -1
  %xtraiter = and i64 %trip, 7
  %1 = icmp ult i64 %0, 7
  br i1 %1, label %exit2.loopexit.unr-lcssa, label %entry.new

%entry.new:
  %unroll_iter = sub i64 %trip, %xtraiter
  br label %loop_header

%loop_header:
  %iv = phi i64 [ 0, %entry.new ], [ %iv_next.7, %loop_latch.7 ]
  %niter = phi i64 [ %unroll_iter, %entry.new ], [ %niter.nsub.7, %loop_latch.7 ]
  br i1 %cond, label %loop_latch, label %loop_exiting_bb1

%loop_exiting_bb1:
  br i1 0, label %loop_exiting_bb2, label %exit1.loopexit

%loop_exiting_bb2:
  br i1 0, label %loop_latch, label %exit3.loopexit

%loop_latch:
  %iv_next = add nsw nuw i64 %iv, 1
  %niter.nsub = sub i64 %niter, 1
  br i1 %cond, label %loop_latch.1, label %loop_exiting_bb1.1

%loop_exiting_bb1.1:
  br i1 0, label %loop_exiting_bb2.1, label %exit1.loopexit

%loop_exiting_bb2.1:
  br i1 0, label %loop_latch.1, label %exit3.loopexit

%loop_latch.1:
  %iv_next.1 = add nsw nuw i64 %iv_next, 1
  %niter.nsub.1 = sub i64 %niter.nsub, 1
  br i1 %cond, label %loop_latch.2, label %loop_exiting_bb1.2

%loop_exiting_bb1.2:
  br i1 0, label %loop_exiting_bb2.2, label %exit1.loopexit

%loop_exiting_bb2.2:
  br i1 0, label %loop_latch.2, label %exit3.loopexit

%loop_latch.2:
  %iv_next.2 = add nsw nuw i64 %iv_next.1, 1
  %niter.nsub.2 = sub i64 %niter.nsub.1, 1
  br i1 %cond, label %loop_latch.3, label %loop_exiting_bb1.3

%loop_exiting_bb1.3:
  br i1 0, label %loop_exiting_bb2.3, label %exit1.loopexit

%loop_exiting_bb2.3:
  br i1 0, label %loop_latch.3, label %exit3.loopexit

%loop_latch.3:
  %iv_next.3 = add nsw nuw i64 %iv_next.2, 1
  %niter.nsub.3 = sub i64 %niter.nsub.2, 1
  br i1 %cond, label %loop_latch.4, label %loop_exiting_bb1.4

%loop_exiting_bb1.4:
  br i1 0, label %loop_exiting_bb2.4, label %exit1.loopexit

%loop_exiting_bb2.4:
  br i1 0, label %loop_latch.4, label %exit3.loopexit

%loop_latch.4:
  %iv_next.4 = add nsw nuw i64 %iv_next.3, 1
  %niter.nsub.4 = sub i64 %niter.nsub.3, 1
  br i1 %cond, label %loop_latch.5, label %loop_exiting_bb1.5

%loop_exiting_bb1.5:
  br i1 0, label %loop_exiting_bb2.5, label %exit1.loopexit

%loop_exiting_bb2.5:
  br i1 0, label %loop_latch.5, label %exit3.loopexit

%loop_latch.5:
  %iv_next.5 = add nsw nuw i64 %iv_next.4, 1
  %niter.nsub.5 = sub i64 %niter.nsub.4, 1
  br i1 %cond, label %loop_latch.6, label %loop_exiting_bb1.6

%loop_exiting_bb1.6:
  br i1 0, label %loop_exiting_bb2.6, label %exit1.loopexit

%loop_exiting_bb2.6:
  br i1 0, label %loop_latch.6, label %exit3.loopexit

%loop_latch.6:
  %iv_next.6 = add nsw nuw i64 %iv_next.5, 1
  %niter.nsub.6 = sub i64 %niter.nsub.5, 1
  br i1 %cond, label %loop_latch.7, label %loop_exiting_bb1.7

%loop_exiting_bb1.7:
  br i1 0, label %loop_exiting_bb2.7, label %exit1.loopexit

%loop_exiting_bb2.7:
  br i1 0, label %loop_latch.7, label %exit3.loopexit

%loop_latch.7:
  %iv_next.7 = add i64 %iv_next.6, 1
  %niter.nsub.7 = sub i64 %niter.nsub.6, 1
  %niter.ncmp.7 = icmp ne i64 %niter.nsub.7, 0
  br i1 %niter.ncmp.7, label %loop_header, label %exit2.loopexit.unr-lcssa.loopexit

%exit2.loopexit.unr-lcssa.loopexit:
  %iv.unr.ph = phi i64 [ %iv_next.7, %loop_latch.7 ]
  br label %exit2.loopexit.unr-lcssa

%exit3.loopexit:
  br label %exit3

%exit1.loopexit:
  br label %exit1

%exit2.loopexit.unr-lcssa:
  %iv.unr = phi i64 [ 0, %entry ], [ %iv.unr.ph, %exit2.loopexit.unr-lcssa.loopexit ]
  %lcmp.mod = icmp ne i64 %xtraiter, 0
  br i1 %lcmp.mod, label %loop_header.epil.preheader, label %exit2.loopexit

%loop_header.epil.preheader:
  br label %loop_header.epil

%loop_header.epil:
  %iv.epil = phi i64 [ %iv.unr, %loop_header.epil.preheader ], [ %iv_next.epil, %loop_latch.epil ]
  %epil.iter = phi i64 [ %xtraiter, %loop_header.epil.preheader ], [ %epil.iter.sub, %loop_latch.epil ]
  br i1 %cond, label %loop_latch.epil, label %loop_exiting_bb1.epil

%loop_exiting_bb1.epil:
  br i1 0, label %loop_exiting_bb2.epil, label %exit1.loopexit1

%loop_exiting_bb2.epil:
  br i1 0, label %loop_latch.epil, label %exit3.loopexit2

%loop_latch.epil:
  %iv_next.epil = add i64 %iv.epil, 1
  %cmp.epil = icmp ne i64 %iv_next.epil, %trip
  %epil.iter.sub = sub i64 %epil.iter, 1
  %epil.iter.cmp = icmp ne i64 %epil.iter.sub, 0
  br i1 %epil.iter.cmp, label %loop_header.epil, label %exit2.loopexit.epilog-lcssa

%exit2.loopexit.epilog-lcssa:
  br label %exit2.loopexit

%exit3.loopexit2:
  br label %exit3

%exit3:
  ret void

%exit1.loopexit1:
  br label %exit1

%exit1:
  ret void

%exit2.loopexit:
  ret void
}
Transformation doesn't verify!
ERROR: Source is more defined than target

Example:
i64 %trip = poison
i1 %cond = #x0 (0)

Source:
i64 %iv = #x0000000000000000 (0)
i64 %iv_next = #x0000000000000001 (1)
i1 %cmp = poison

Target:
i64 %0 = poison
i64 %xtraiter = poison
i1 %1 = poison
i64 %unroll_iter = poison
i64 %iv = #x0000000000000000 (0)
i64 %niter = poison
i64 %iv_next = #x0000000000000001 (1)
i64 %niter.nsub = poison
i64 %iv_next.1 = #x0000000000000002 (2)
i64 %niter.nsub.1 = poison
i64 %iv_next.2 = #x0000000000000003 (3)
i64 %niter.nsub.2 = poison
i64 %iv_next.3 = #x0000000000000004 (4)
i64 %niter.nsub.3 = poison
i64 %iv_next.4 = #x0000000000000005 (5)
i64 %niter.nsub.4 = poison
i64 %iv_next.5 = #x0000000000000006 (6)
i64 %niter.nsub.5 = poison
i64 %iv_next.6 = #x0000000000000007 (7)
i64 %niter.nsub.6 = poison
i64 %iv_next.7 = #x0000000000000008 (8)
i64 %niter.nsub.7 = poison
i1 %niter.ncmp.7 = poison
i64 %iv.unr.ph = #x0000000000000008 (8)
i64 %iv.unr = #x0000000000000000 (0)
i1 %lcmp.mod = poison
i64 %iv.epil = #x0000000000000000 (0)
i64 %epil.iter = #x0000000000000000 (0)
i64 %iv_next.epil = #x0000000000000001 (1)
i1 %cmp.epil = #x1 (1)
i64 %epil.iter.sub = #xffffffffffffffff (18446744073709551615, -1)
i1 %epil.iter.cmp = #x1 (1)



------------------- SMT STATS -------------------
Num queries: 2
Num invalid: 0
Num skips:   0
Num trivial: 20 (90.9%)
Num timeout: 0 (0.0%)
Num errors:  0 (0.0%)
Num SAT:     2 (100.0%)
Num UNSAT:   0 (0.0%)
Alive2: Transform doesn't verify; aborting!

stderr:

+ : 'RUN: at line 1'
+ /home/nlopes/alive2/build/opt-alive.sh -loop-unroll -unroll-runtime=true -unroll-runtime-epilog=true -unroll-runtime-multi-exit=true -verify-loop-lcssa -verify-dom-info -verify-loop-info -S
+ /home/nlopes/llvm/build/bin/FileCheck /home/nlopes/llvm/llvm/test/Transforms/LoopUnroll/runtime-loop-multiple-exits.ll -check-prefix=EPILOG-NO-IC

FileCheck error: '<stdin>' is empty.
FileCheck command line:  /home/nlopes/llvm/build/bin/FileCheck /home/nlopes/llvm/llvm/test/Transforms/LoopUnroll/runtime-loop-multiple-exits.ll -check-prefix=EPILOG-NO-IC

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