Test Failure: Transforms/StraightLineStrengthReduce/slsr-add.ll

Test source: git

Log:

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

----------------------------------------
define void @shl(i32 %b, i32 %s) {
%0:
  %t1 = add i32 %b, %s
  call void @foo(i32 %t1)
  %s2 = shl i32 %s, 1
  %t2 = add i32 %b, %s2
  call void @foo(i32 %t2)
  ret void
}
Transformation seems to be correct! (syntactically equal)

-- 3. StraightLineStrengthReducePass

----------------------------------------
define void @shl(i32 %b, i32 %s) {
%0:
  %t1 = add i32 %b, %s
  call void @foo(i32 %t1)
  %s2 = shl i32 %s, 1
  %t2 = add i32 %b, %s2
  call void @foo(i32 %t2)
  ret void
}
=>
define void @shl(i32 %b, i32 %s) {
%0:
  %t1 = add i32 %b, %s
  call void @foo(i32 %t1)
  %t2 = add i32 %t1, %s
  call void @foo(i32 %t2)
  ret void
}
Transformation doesn't verify! (unsound)
ERROR: Source is more defined than target

Example:
i32 %b = #x00000000 (0)
i32 %s = undef

Source:
i32 %t1 = #x00000000 (0)	[based on undef value]
Function @foo returned
i32 %s2 = #x00000000 (0)	[based on undef value]
i32 %t2 = #x00000000 (0)
void = function did not return!

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

Target:
i32 %t1 = #x01ad0116 (28115222)
Function @foo triggered UB
i32 %t2 = UB triggered!


Pass: StraightLineStrengthReducePass
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=slsr,gvn' '-S' '-tv-smt-to=20000' '-tv-report-dir=/home/nlopes/alive2/build/logs' '-tv-smt-stats'


------------------- SMT STATS -------------------
Num queries: 4
Num invalid: 0
Num skips:   0
Num trivial: 6 (60.0%)
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:

+ : 'RUN: at line 2'
+ /home/nlopes/alive2/build/opt-alive.sh -passes=slsr,gvn -S
+ /bitbucket/nlopes/llvm/build/bin/FileCheck /bitbucket/nlopes/llvm/llvm/test/Transforms/StraightLineStrengthReduce/slsr-add.ll

FileCheck error: '<stdin>' is empty.
FileCheck command line:  /bitbucket/nlopes/llvm/build/bin/FileCheck /bitbucket/nlopes/llvm/llvm/test/Transforms/StraightLineStrengthReduce/slsr-add.ll

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

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