Test Failure: Transforms/InstCombine/vec_gep_scalar_arg.ll

Test source: git

Log:

Source: <stdin>

----------------------------------------
define <4 x *> @PR41270(* %x) {
%0:
  %ins = insertelement <4 x *> undef, * %x, i32 0
  %splat = shufflevector <4 x *> %ins, <4 x *> undef, 0, 0, 0, 0
  %t2 = gep inbounds <4 x *> %splat, 8 x i32 0, 2 x i32 3
  %t3 = extractelement <4 x *> %t2, i32 3
  %ins2 = insertelement <4 x *> undef, * %t3, i32 0
  ret <4 x *> %ins2
}
=>
define <4 x *> @PR41270(* %x) {
%0:
  %1 = insertelement <4 x *> undef, * %x, i32 0
  %2 = gep inbounds <4 x *> %1, 8 x i64 0, 2 x i64 3
  ret <4 x *> %2
}
Transformation doesn't verify!
ERROR: Target is more poisonous than source

Example:
* %x = undef

Source:
<4 x *> %ins = < undef, undef, undef, undef >
<4 x *> %splat = < undef, undef, undef, undef >
<4 x *> %t2 = < poison, poison, poison, poison >
* %t3 = poison
<4 x *> %ins2 = < poison, undef, undef, undef >

SOURCE MEMORY STATE
===================
NON-LOCAL BLOCKS:
Block 0 >	size: 0	align: 64	alloc type: 0
Block 1 >	align: 4	alloc type: 0

Target:
<4 x *> %1 = < undef, pointer(non-local, block_id=0, offset=-3), null, pointer(non-local, block_id=0, offset=-7) >
<4 x *> %2 = < poison, poison, poison, poison >
Source value: < poison, undef, undef, undef >
Target value: < poison, poison, poison, poison >


------------------- SMT STATS -------------------
Num queries: 18
Num invalid: 0
Num skips:   0
Num trivial: 2 (10.0%)
Num timeout: 0 (0.0%)
Num errors:  0 (0.0%)
Num SAT:     2 (11.1%)
Num UNSAT:   16 (88.9%)

stderr:

+ : 'RUN: at line 2'
+ /home/nlopes/alive2/scripts/opt-alive.sh -instcombine -S
+ /home/nlopes/llvm/build/bin/FileCheck /home/nlopes/llvm/llvm/test/Transforms/InstCombine/vec_gep_scalar_arg.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/InstCombine/vec_gep_scalar_arg.ll

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