Test Failure: Transforms/Scalarizer/scatter-order.ll

Test source: git

Log:

Source: /bitbucket/nlopes/llvm/llvm/test/Transforms/Scalarizer/scatter-order.ll
-- 1. ModuleToFunctionPassAdaptor
-- 1. PassManager<Function> : Skipping NOP
-- 2. ScalarizerPass

----------------------------------------
define <2 x i32> @test1(i1 %b, <2 x i32> %i, <2 x i32> %j) {
#0:
  %res = select i1 %b, <2 x i32> %i, <2 x i32> %j
  ret <2 x i32> %res
}
Transformation seems to be correct! (syntactically equal)

-- 3. ScalarizerPass

----------------------------------------
define <2 x i32> @test1(i1 %b, <2 x i32> %i, <2 x i32> %j) {
#0:
  %res = select i1 %b, <2 x i32> %i, <2 x i32> %j
  ret <2 x i32> %res
}
=>
define <2 x i32> @test1(i1 %b, <2 x i32> %i, <2 x i32> %j) {
#0:
  %i.i0 = extractelement <2 x i32> %i, i64 0
  %j.i0 = extractelement <2 x i32> %j, i64 0
  %res.i0 = select i1 %b, i32 %i.i0, i32 %j.i0
  %i.i1 = extractelement <2 x i32> %i, i64 1
  %j.i1 = extractelement <2 x i32> %j, i64 1
  %res.i1 = select i1 %b, i32 %i.i1, i32 %j.i1
  %res.upto0 = insertelement <2 x i32> poison, i32 %res.i0, i64 0
  %res = insertelement <2 x i32> %res.upto0, i32 %res.i1, i64 1
  ret <2 x i32> %res
}
Transformation doesn't verify! (unsound)
ERROR: Target is more poisonous than source

Example:
i1 %b = undef
<2 x i32> %i = < poison, #x00000000 (0)	[based on undef value] >
<2 x i32> %j = < #x00000000 (0)	[based on undef value], poison >

Source:
<2 x i32> %res = < poison, poison >

Target:
i32 %i.i0 = poison
i32 %j.i0 = #x00000000 (0)
i32 %res.i0 = poison
i32 %i.i1 = #x00000000 (0)
i32 %j.i1 = poison
i32 %res.i1 = poison
<2 x i32> %res.upto0 = < poison, poison >
<2 x i32> %res = < poison, poison >
Source value: < poison, poison >
Target value: < poison, poison >

Pass: ScalarizerPass
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' '/bitbucket/nlopes/llvm/llvm/test/Transforms/Scalarizer/scatter-order.ll' '-passes=function(scalarizer<load-store>)' '-S' '-tv-smt-to=20000' '-tv-report-dir=/home/nlopes/alive2/build/logs' '-tv-smt-stats'
Wrote bitcode to: "/home/nlopes/alive2/build/logs/scatter-order_Jw3U9ea5_9unE.bc"


------------------- SMT STATS -------------------
Num queries: 16
Num invalid: 0
Num skips:   0
Num trivial: 7 (30.4%)
Num timeout: 0 (0.0%)
Num errors:  0 (0.0%)
Num SAT:     12 (75.0%)
Num UNSAT:   4 (25.0%)
Alive2: Transform doesn't verify; aborting!

stderr:

RUN: at line 2: /home/nlopes/alive2/build/opt-alive.sh /bitbucket/nlopes/llvm/llvm/test/Transforms/Scalarizer/scatter-order.ll -passes='function(scalarizer<load-store>)' -S | /bitbucket/nlopes/llvm/build/bin/FileCheck /bitbucket/nlopes/llvm/llvm/test/Transforms/Scalarizer/scatter-order.ll
+ /home/nlopes/alive2/build/opt-alive.sh /bitbucket/nlopes/llvm/llvm/test/Transforms/Scalarizer/scatter-order.ll '-passes=function(scalarizer<load-store>)' -S
+ /bitbucket/nlopes/llvm/build/bin/FileCheck /bitbucket/nlopes/llvm/llvm/test/Transforms/Scalarizer/scatter-order.ll

FileCheck error: '<stdin>' is empty.
FileCheck command line:  /bitbucket/nlopes/llvm/build/bin/FileCheck /bitbucket/nlopes/llvm/llvm/test/Transforms/Scalarizer/scatter-order.ll

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

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