Test Failure: Transforms/LoopUnroll/peel-last-iteration-with-variable-trip-count.ll

Test source: git

Log:

Source: /bitbucket/nlopes/llvm/llvm/test/Transforms/LoopUnroll/peel-last-iteration-with-variable-trip-count.ll
-- 1. ModuleToFunctionPassAdaptor
-- 1. PassManager<Function> : Skipping NOP
-- 2. LoopUnrollPass

----------------------------------------
declare void @foo(i32)

define i32 @peel_last_with_trip_count_check_lcssa_phi(i32 %n) {
entry:
  %sub = add i32 %n, 4294967295
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %c = icmp eq i32 %iv, %sub
  %sel = select i1 %c, i32 1, i32 2
  call void @foo(i32 %sel)
  %iv.next = add i32 %iv, 1
  %ec = icmp ne i32 %iv.next, %n
  br i1 %ec, label %loop, label %exit

exit:
  %sel.lcssa = phi i32 [ %sel, %loop ]
  ret i32 %sel.lcssa
}
Transformation seems to be correct! (syntactically equal)

-- 3. LoopUnrollPass

----------------------------------------
declare void @foo(i32)

define i32 @peel_last_with_trip_count_check_lcssa_phi(i32 %n) {
entry:
  %sub = add i32 %n, 4294967295
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry ], [ %iv.next, %loop ]
  %c = icmp eq i32 %iv, %sub
  %sel = select i1 %c, i32 1, i32 2
  call void @foo(i32 %sel)
  %iv.next = add i32 %iv, 1
  %ec = icmp ne i32 %iv.next, %n
  br i1 %ec, label %loop, label %exit

exit:
  %sel.lcssa = phi i32 [ %sel, %loop ]
  ret i32 %sel.lcssa
}
=>
declare void @foo(i32)

define i32 @peel_last_with_trip_count_check_lcssa_phi(i32 %n) {
entry:
  %sub = add i32 %n, 4294967295
  %#0 = icmp ne i32 %sub, 0
  br i1 %#0, label %entry.split, label %exit.peel.begin

entry.split:
  br label %loop

loop:
  %iv = phi i32 [ 0, %entry.split ], [ %iv.next, %loop ]
  call void @foo(i32 2)
  %iv.next = add nuw i32 %iv, 1
  %#1 = sub i32 %n, 1
  %ec = icmp ne i32 %iv.next, %#1
  br i1 %ec, label %loop, label %exit.peel.begin.loopexit

exit.peel.begin.loopexit:
  %.ph = phi i32 [ %iv.next, %loop ]
  br label %exit.peel.begin

exit.peel.begin:
  %#2 = phi i32 [ 0, %entry ], [ %.ph, %exit.peel.begin.loopexit ]
  br label %loop.peel

loop.peel:
  %c.peel = icmp eq i32 %#2, %sub
  %sel.peel = select i1 %c.peel, i32 1, i32 2
  call void @foo(i32 %sel.peel)
  %iv.next.peel = add i32 %#2, 1
  %ec.peel = icmp ne i32 %iv.next.peel, %n
  br i1 %ec.peel, label %exit.peel.next, label %exit.peel.next

exit.peel.next:
  br label %loop.peel.next

loop.peel.next:
  br label %exit

exit:
  ret i32 %sel.peel
}
Transformation doesn't verify! (unsound)
ERROR: Source is more defined than target

Example:
i32 %n = poison

Source:
i32 %sub = poison
  >> Jump to %loop
i32 %iv = #x00000000 (0)
i1 %c = poison
i32 %sel = poison
void = function did not return!

SOURCE MEMORY STATE
===================
NON-LOCAL BLOCKS:
Block 0 >	size: 0	align: 1	alloc type: 0	alive: false	address: 0
Block 1 >	size: 0	align: 1	alloc type: 0	alive: true	address: 1

Target:
i32 %sub = poison
i1 %#0 = poison
UB triggered on br


Pass: LoopUnrollPass
Command line: '/home/nlopes/llvm/build/bin/opt' '-load=/home/nlopes/alive2/build/tv/tv.so' '-load-pass-plugin=/home/nlopes/alive2/build/tv/tv.so' '-tv-exit-on-error' '-p' 'loop-unroll' '-unroll-full-max-count=0' '-S' '/bitbucket/nlopes/llvm/llvm/test/Transforms/LoopUnroll/peel-last-iteration-with-variable-trip-count.ll' '-tv-smt-to=20000' '-tv-report-dir=/home/nlopes/alive2/build/logs' '-tv-smt-stats'
Wrote bitcode to: "/home/nlopes/alive2/build/logs/peel-last-iteration-with-variable-trip-count_J3HbDJ9c_R4En.bc"


------------------- SMT STATS -------------------
Num queries: 19
Num invalid: 0
Num skips:   0
Num trivial: 1 (5.0%)
Num timeout: 0 (0.0%)
Num errors:  0 (0.0%)
Num SAT:     17 (89.5%)
Num UNSAT:   2 (10.5%)
Alive2: Transform doesn't verify; aborting!

stderr:

/home/nlopes/alive2/build/opt-alive.sh -p loop-unroll -unroll-full-max-count=0 -S /bitbucket/nlopes/llvm/llvm/test/Transforms/LoopUnroll/peel-last-iteration-with-variable-trip-count.ll | /bitbucket/nlopes/llvm/build/bin/FileCheck /bitbucket/nlopes/llvm/llvm/test/Transforms/LoopUnroll/peel-last-iteration-with-variable-trip-count.ll # RUN: at line 2
+ /home/nlopes/alive2/build/opt-alive.sh -p loop-unroll -unroll-full-max-count=0 -S /bitbucket/nlopes/llvm/llvm/test/Transforms/LoopUnroll/peel-last-iteration-with-variable-trip-count.ll
+ /bitbucket/nlopes/llvm/build/bin/FileCheck /bitbucket/nlopes/llvm/llvm/test/Transforms/LoopUnroll/peel-last-iteration-with-variable-trip-count.ll

FileCheck error: '<stdin>' is empty.
FileCheck command line:  /bitbucket/nlopes/llvm/build/bin/FileCheck /bitbucket/nlopes/llvm/llvm/test/Transforms/LoopUnroll/peel-last-iteration-with-variable-trip-count.ll

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