Test Failure: Transforms/InstCombine/ffs-1.ll

Test source: git

Log:

Source: <stdin>

----------------------------------------
define i32 @test_simplify1() {
%0:
  %ret = ffs i32 0
  ret i32 %ret
}
=>
define i32 @test_simplify1() {
%0:
  ret i32 0
}
Transformation seems to be correct!


----------------------------------------
define i32 @test_simplify4() {
%0:
  %ret = ffs i32 1
  ret i32 %ret
}
=>
define i32 @test_simplify4() {
%0:
  ret i32 1
}
Transformation seems to be correct!


----------------------------------------
define i32 @test_simplify5() {
%0:
  %ret = ffs i32 2048
  ret i32 %ret
}
=>
define i32 @test_simplify5() {
%0:
  ret i32 12
}
Transformation seems to be correct!


----------------------------------------
define i32 @test_simplify6() {
%0:
  %ret = ffs i32 65536
  ret i32 %ret
}
=>
define i32 @test_simplify6() {
%0:
  ret i32 17
}
Transformation seems to be correct!


----------------------------------------
define i32 @test_simplify13(i32 %x) {
%0:
  %ret = ffs i32 %x
  ret i32 %ret
}
=>
define i32 @test_simplify13(i32 %x) {
%0:
  %cttz = cttz i32 %x, 1
  %range_l#0%cttz = icmp sge i32 %cttz, 0
  %range_h#0%cttz = icmp slt i32 %cttz, 33
  %range#0%cttz = and i1 %range_l#0%cttz, %range_h#0%cttz
  assume_non_poison i1 %range#0%cttz
  %1 = add nsw nuw i32 %cttz, 1
  %.not = icmp eq i32 %x, 0
  %2 = select i1 %.not, i32 0, i32 %1
  ret i32 %2
}
Transformation doesn't verify!
ERROR: Target is more poisonous than source

Example:
i32 %x = undef

Source:
i32 %ret = #x00000000 (0)	[based on undef value]

Target:
i32 %cttz = #x00000000 (0)
i1 %range_l#0%cttz = #x1 (1)
i1 %range_h#0%cttz = #x1 (1)
i1 %range#0%cttz = #x1 (1)
i32 %1 = poison
i1 %.not = #x0 (0)
i32 %2 = poison
Source value: #x00000000 (0)
Target value: poison


------------------- SMT STATS -------------------
Num queries: 8
Num invalid: 0
Num skips:   0
Num trivial: 33 (80.5%)
Num timeout: 0 (0.0%)
Num errors:  0 (0.0%)
Num SAT:     7 (87.5%)
Num UNSAT:   1 (12.5%)
Alive2: Transform doesn't verify; aborting!

stderr:

+ : 'RUN: at line 3'
+ /home/nlopes/alive2/build/opt-alive.sh -instcombine -S
+ /home/nlopes/llvm/build/bin/FileCheck /home/nlopes/llvm/llvm/test/Transforms/InstCombine/ffs-1.ll --check-prefix=ALL --check-prefix=GENERIC

FileCheck error: '<stdin>' is empty.
FileCheck command line:  /home/nlopes/llvm/build/bin/FileCheck /home/nlopes/llvm/llvm/test/Transforms/InstCombine/ffs-1.ll --check-prefix=ALL --check-prefix=GENERIC

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

<-- Back