Test Failure: Transforms/SLPVectorizer/X86/minbw-node-used-twice.ll

Test source: git

Log:

Source: <stdin>
-- 1. ModuleToFunctionPassAdaptor
-- 1. PassManager<Function> : Skipping NOP
-- 2. SLPVectorizerPass

----------------------------------------
define i8 @test() {
entry:
  %conv4.i.i = zext i16 0 to i32
  %conv7.i.i = sext i16 0 to i32
  %cmp8.i.i = icmp slt i32 %conv7.i.i, %conv4.i.i
  %conv9.i.i = zext i1 %cmp8.i.i to i32
  %or10.i.i = or i32 %conv9.i.i, %conv4.i.i
  %cmp11.i.i = icmp eq i32 %or10.i.i, %conv4.i.i
  %sub.i.i79.peel.i = sub i16 0, 1
  %xor5.i81.peel.i = zext i16 %sub.i.i79.peel.i to i32
  %conv7.i84.peel.i = sext i16 0 to i32
  %cmp8.i85.peel.i = icmp slt i32 %conv7.i84.peel.i, %xor5.i81.peel.i
  %conv9.i86.peel.i = zext i1 %cmp8.i85.peel.i to i32
  %or10.i87.peel.i = or i32 %conv9.i86.peel.i, %xor5.i81.peel.i
  %cmp11.i88.peel.i = icmp eq i32 %or10.i87.peel.i, %xor5.i81.peel.i
  %conv13.i89.peel.i = zext i1 %cmp8.i85.peel.i to i8
  ret i8 %conv13.i89.peel.i
}
Transformation seems to be correct! (syntactically equal)

-- 3. SLPVectorizerPass

----------------------------------------
define i8 @test() {
entry:
  %sub.i.i79.peel.i = sub i16 0, 1
  %xor5.i81.peel.i = zext i16 %sub.i.i79.peel.i to i32
  %conv7.i84.peel.i = sext i16 0 to i32
  %cmp8.i85.peel.i = icmp slt i32 %conv7.i84.peel.i, %xor5.i81.peel.i
  %conv13.i89.peel.i = zext i1 %cmp8.i85.peel.i to i8
  ret i8 %conv13.i89.peel.i
}
=>
define i8 @test() {
entry:
  %conv13.i89.peel.i = zext i1 0 to i8
  ret i8 %conv13.i89.peel.i
}
Transformation doesn't verify! (unsound)
ERROR: Value mismatch

NOTE: The counterexample is unique.

Example:

Source:
i16 %sub.i.i79.peel.i = #xffff (65535, -1)
i32 %xor5.i81.peel.i = #x0000ffff (65535)
i32 %conv7.i84.peel.i = #x00000000 (0)
i1 %cmp8.i85.peel.i = #x1 (1)
i8 %conv13.i89.peel.i = #x01 (1)

Target:
i8 %conv13.i89.peel.i = #x00 (0)
Source value: #x01 (1)
Target value: #x00 (0)

Pass: SLPVectorizerPass
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' '-S' '--passes=slp-vectorizer' '-mtriple=x86_64-unknown-linux' '-tv-smt-to=20000' '-tv-report-dir=/home/nlopes/alive2/build/logs' '-tv-smt-stats'

Wrote bitcode to: "/home/nlopes/alive2/build/logs/in_RYLUqgp1_1HQu.bc"

------------------- SMT STATS -------------------
Num queries: 4
Num invalid: 0
Num skips:   0
Num trivial: 13 (76.5%)
Num timeout: 0 (0.0%)
Num errors:  0 (0.0%)
Num SAT:     4 (100.0%)
Num UNSAT:   0 (0.0%)
Alive2: Transform doesn't verify; aborting!

stderr:

Transforms/SLPVectorizer/X86/minbw-node-used-twice.ll' FAILED ********************
Exit Code: 2

Command Output (stdout):
--
# RUN: at line 2
/home/nlopes/alive2/build/opt-alive.sh -S --passes=slp-vectorizer -mtriple=x86_64-unknown-linux < /bitbucket/nlopes/llvm/llvm/test/Transforms/SLPVectorizer/X86/minbw-node-used-twice.ll | /bitbucket/nlopes/llvm/build/bin/FileCheck /bitbucket/nlopes/llvm/llvm/test/Transforms/SLPVectorizer/X86/minbw-node-used-twice.ll
# executed command: /home/nlopes/alive2/build/opt-alive.sh -S --passes=slp-vectorizer -mtriple=x86_64-unknown-linux
# .---command stderr------------
# `-----------------------------
# error: command failed with exit status: 1
# executed command: /bitbucket/nlopes/llvm/build/bin/FileCheck /bitbucket/nlopes/llvm/llvm/test/Transforms/SLPVectorizer/X86/minbw-node-used-twice.ll
# .---command stderr------------
# | FileCheck error: '<stdin>' is empty.
# | FileCheck command line:  /bitbucket/nlopes/llvm/build/bin/FileCheck /bitbucket/nlopes/llvm/llvm/test/Transforms/SLPVectorizer/X86/minbw-node-used-twice.ll
# `-----------------------------
# error: command failed with exit status: 2

--

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