CEE optimization for C1 compiler was useless

[kelthuzadx]

Hi,
Conditional expression elimination replaces the common code pattern of a branch that loads one of two values by a conditional move instruction, but it seems produce the same native code with unoptimized version.



Let's say I have this code snippet https://paste.ubuntu.com/p/FnQSBCsh4K/, then add -XX:CompileOnly=com.github.kelthuzadx::conditionalExpressionElimination -Xcmp -XX:TieredStopAtLevel=1 -XX:+DoCEE -XX:+PrintIR, -XX:+PrintLIRWithAssembly, here https://paste.ubuntu.com/p/ZRXxHrMG6N/ is the generated machine code and C1' internal IR representation, it is that eliminated conditional expressions in phase 2, but later traditional cmp-jmp combinations were generated as if CEE was useless.
mov    %eax,-0x9000(%rsp)
push   %rbp
sub    $0x30,%rsp
cmp    $0xa,%edx
mov    $0x0,%eax
jle    0x000001819f0a103f
mov    $0x1,%eax
add    $0x30,%rsp
pop    %rbp
mov    0x120(%r15),%r10
test   %eax,(%r10)
retq   

I disable this optimization by -XX:-DoCEE, it generated almost the same version with prior one :https://paste.ubuntu.com/p/7mPcVhDT6t/


Moreover, CEE can not apply to normal conditional assignment statement(https://paste.ubuntu.com/p/Zbg3WzRv5J/)，it only works on ternary expression(?:)


Is this  a bug?Or it intentionally generated cmp-jmp combinations rather than cmovcc/setcc instructions for some reason?