Weird clang behavior

Hi,

Is it normal to have such behavior?

$ cat loop.c
int
main(void)
{
for (;;)
;
}
$ clang -O1 -Wall -Wextra -S -o loop.c.s loop.c
$ clang++ -O1 -Wall -Wextra -S -o loop.cxx.s loop.c
clang++: warning: treating 'c' input as 'c++' when in C++ mode, this behavior is deprecated [-Wdeprecated]
$ diff -U8 loop.c.s loop.cxx.s
--- loop.c.s Thu Mar 2 11:55:02 2023
+++ loop.cxx.s Thu Mar 2 11:55:08 2023
@@ -5,20 +5,16 @@
.type main,@function
main: # @main
.cfi_startproc
# %bb.0:
pushq %rbp
.cfi_def_cfa_offset 16
.cfi_offset %rbp, -16
movq %rsp, %rbp
- .cfi_def_cfa_register %rbp
- .p2align 4, 0x90
-.LBB0_1: # =>This Inner Loop Header: Depth=1
- jmp .LBB0_1
.Lfunc_end0:
.size main, .Lfunc_end0-main
.cfi_endproc
# -- End function
.section .text.__llvm_retpoline_r11,"axG",@progbits,__llvm_retpoline_r11,comdat
.hidden __llvm_retpoline_r11 # -- Begin function __llvm_retpoline_r11
.weak __llvm_retpoline_r11
.p2align 4, 0xcc


See that jmp instruction which is removed.
Without that jmp instruction the main function might reach other codes!