Test Failure: Transforms/CodeGenPrepare/X86/memset_chk-simplify-nobuiltin.ll

Test source: git

Comments: __memset_chk() not recognized as a builtin on purpose. Need to detect this case.

Log:

Source: <stdin>

----------------------------------------
define void @test_nobuiltin(* %dst, i64 %len) {
%0:
  %1 = call * @__memset_chk(* %dst, i32 0, i64 %len, i64 -1)
  ret void
}
=>
define void @test_nobuiltin(* %dst, i64 %len) {
%0:
  memset * %dst align 1, i8 0, i64 %len
  ret void
}
Transformation doesn't verify!
ERROR: Source is more defined than target

Example:
* %dst = poison
i64 %len = poison

Source:
* %1 = poison

SOURCE MEMORY STATE
===================
NON-LOCAL BLOCKS:
Block 0 >	size: 0	align: 1	alloc type: 0
Block 1 >	align: 2	alloc type: 0
Block 2 >	align: 16	alloc type: 0
Block 3 >	align: 16	alloc type: 0

Target:



------------------- SMT STATS -------------------
Num queries: 2
Num invalid: 0
Num skips:   0
Num trivial: 0 (0.0%)
Num timeout: 0 (0.0%)
Num errors:  0 (0.0%)
Num SAT:     2 (100.0%)
Num UNSAT:   0 (0.0%)

stderr:

+ : 'RUN: at line 2'
+ /home/nlopes/alive2/build/opt-alive.sh -S -mtriple=x86_64 -disable-simplify-libcalls -codegenprepare
+ /home/nlopes/llvm/build/bin/FileCheck /home/nlopes/llvm/llvm/test/Transforms/CodeGenPrepare/X86/memset_chk-simplify-nobuiltin.ll

Alive2: Transform doesn't verify; aborting!
FileCheck error: '<stdin>' is empty.
FileCheck command line:  /home/nlopes/llvm/build/bin/FileCheck /home/nlopes/llvm/llvm/test/Transforms/CodeGenPrepare/X86/memset_chk-simplify-nobuiltin.ll

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