Test Failure: Transforms/InstSimplify/ctpop-pow2.ll

Test source: git

Log:

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

----------------------------------------
define i64 @ctpop_1_shl(i64 %x) {
%0:
  %v = shl i64 1, %x
  %cnt = ctpop i64 %v
  ret i64 %cnt
}
Transformation seems to be correct! (syntactically equal)

-- 3. InstSimplifyPass

----------------------------------------
define i64 @ctpop_1_shl(i64 %x) {
%0:
  %v = shl i64 1, %x
  %cnt = ctpop i64 %v
  ret i64 %cnt
}
=>
define i64 @ctpop_1_shl(i64 %x) {
%0:
  ret i64 1
}
Transformation seems to be correct!

-- 4. PassManager<Function> : Skipping NOP
-- 5. PassManager<Function> : Skipping NOP
-- 6. InstSimplifyPass

----------------------------------------
define i32 @ctpop_imin_lshr(i32 %x) {
%0:
  %v = lshr i32 2147483648, %x
  %cnt = ctpop i32 %v
  ret i32 %cnt
}
Transformation seems to be correct! (syntactically equal)

-- 7. InstSimplifyPass

----------------------------------------
define i32 @ctpop_imin_lshr(i32 %x) {
%0:
  %v = lshr i32 2147483648, %x
  %cnt = ctpop i32 %v
  ret i32 %cnt
}
=>
define i32 @ctpop_imin_lshr(i32 %x) {
%0:
  ret i32 1
}
Transformation seems to be correct!

-- 8. PassManager<Function> : Skipping NOP
-- 9. PassManager<Function> : Skipping NOP
-- 10. InstSimplifyPass

----------------------------------------
define i16 @ctpop_x_and_negx(i16 %x) {
%0:
  %v0 = sub i16 0, %x
  %v1 = and i16 %x, %v0
  %cnt = ctpop i16 %v1
  ret i16 %cnt
}
Transformation seems to be correct! (syntactically equal)

-- 11. InstSimplifyPass

----------------------------------------
define i16 @ctpop_x_and_negx(i16 %x) {
%0:
  %v0 = sub i16 0, %x
  %v1 = and i16 %x, %v0
  %cnt = ctpop i16 %v1
  ret i16 %cnt
}
Transformation seems to be correct! (syntactically equal)

-- 12. PassManager<Function> : Skipping NOP
-- 13. PassManager<Function> : Skipping NOP
-- 14. InstSimplifyPass

----------------------------------------
define i8 @ctpop_x_nz_and_negx(i8 %x) {
%0:
  %x1 = or i8 %x, 1
  %v0 = sub i8 0, %x1
  %v1 = and i8 %x1, %v0
  %cnt = ctpop i8 %v1
  ret i8 %cnt
}
Transformation seems to be correct! (syntactically equal)

-- 15. InstSimplifyPass

----------------------------------------
define i8 @ctpop_x_nz_and_negx(i8 %x) {
%0:
  %x1 = or i8 %x, 1
  %v0 = sub i8 0, %x1
  %v1 = and i8 %x1, %v0
  %cnt = ctpop i8 %v1
  ret i8 %cnt
}
=>
define i8 @ctpop_x_nz_and_negx(i8 %x) {
%0:
  %x1 = or i8 %x, 1
  %v0 = sub i8 0, %x1
  %v1 = and i8 %x1, %v0
  ret i8 %v1
}
Transformation doesn't verify! (unsound)
ERROR: Value mismatch

Example:
i8 %x = undef

Source:
i8 %x1 = #x01 (1)	[based on undef value]
i8 %v0 = #xff (255, -1)
i8 %v1 = #x01 (1)	[based on undef value]
i8 %cnt = #x01 (1)

Target:
i8 %x1 = #x01 (1)
i8 %v0 = #xff (255, -1)
i8 %v1 = #xff (255, -1)
Source value: #x01 (1)
Target value: #xff (255, -1)

Pass: InstSimplifyPass
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' '-passes=instsimplify' '-S' '-tv-smt-to=20000' '-tv-report-dir=/home/nlopes/alive2/build/logs' '-tv-smt-stats'
Wrote bitcode to: "/home/nlopes/alive2/build/logs/in_U9KMHyu1_aqlP.bc"


------------------- SMT STATS -------------------
Num queries: 13
Num invalid: 0
Num skips:   0
Num trivial: 23 (63.9%)
Num timeout: 0 (0.0%)
Num errors:  0 (0.0%)
Num SAT:     10 (76.9%)
Num UNSAT:   3 (23.1%)
Alive2: Transform doesn't verify; aborting!

stderr:

+ : 'RUN: at line 2'
+ /home/nlopes/alive2/build/opt-alive.sh -passes=instsimplify -S
+ /bitbucket/nlopes/llvm/build/bin/FileCheck /bitbucket/nlopes/llvm/llvm/test/Transforms/InstSimplify/ctpop-pow2.ll

FileCheck error: '<stdin>' is empty.
FileCheck command line:  /bitbucket/nlopes/llvm/build/bin/FileCheck /bitbucket/nlopes/llvm/llvm/test/Transforms/InstSimplify/ctpop-pow2.ll

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

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