Test Failure: Transforms/GVN/PRE/rle-semidominated.ll

Test source: git

Log:

Source: <stdin>

----------------------------------------
define i32 @main(* %p, i32 %x, i32 %y) {
%block1:
  %z = load i32, * %p, align 4
  %cmp = icmp eq i32 %x, %y
  br i1 %cmp, label %block2, label %block3

%block3:
  %b = bitcast i32 0 to i32
  store i32 %b, * %p, align 4
  br label %block4

%block2:
  br label %block4

%block4:
  %DEAD = load i32, * %p, align 4
  ret i32 %DEAD
}
=>
define i32 @main(* %p, i32 %x, i32 %y) {
%block1:
  %cmp = icmp eq i32 %x, %y
  br i1 %cmp, label %block2, label %block3

%block3:
  store i32 0, * %p, align 4
  br label %block4

%block2:
  %DEAD.pre = load i32, * %p, align 4
  br label %block4

%block4:
  %DEAD = phi i32 [ 0, %block3 ], [ %DEAD.pre, %block2 ]
  ret i32 %DEAD
}
Transformation doesn't verify!
ERROR: Source is more defined than target

Example:
* %p = pointer(non-local, block_id=1, offset=0)
i32 %x = any
i32 %y = undef

Source:
i32 %z = poison
i1 %cmp = any
i32 %b = #x00000000 (0)
i32 %DEAD = poison

SOURCE MEMORY STATE
===================
NON-LOCAL BLOCKS:
Block 0 >	size: 0	align: 1	alloc type: 0
Block 1 >	size: 8	align: 4	alloc type: 0

Target:
i1 %cmp = any
i32 %DEAD.pre = poison
i32 %DEAD = poison



------------------- SMT STATS -------------------
Num queries: 5
Num invalid: 0
Num skips:   0
Num trivial: 0 (0.0%)
Num timeout: 0 (0.0%)
Num errors:  0 (0.0%)
Num SAT:     2 (40.0%)
Num UNSAT:   3 (60.0%)

stderr:

+ : 'RUN: at line 1'
+ /home/nlopes/alive2/scripts/opt-alive.sh -basic-aa -gvn -S
+ /home/nlopes/llvm/build/bin/FileCheck /home/nlopes/llvm/llvm/test/Transforms/GVN/PRE/rle-semidominated.ll

Alive2: Transform doesn't verify; aborting!
FileCheck error: '<stdin>' is empty.
FileCheck command line:  /home/nlopes/llvm/build/bin/FileCheck /home/nlopes/llvm/llvm/test/Transforms/GVN/PRE/rle-semidominated.ll

NOTE: This test would pass if undef didn't exist!

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