LLVM hello world

hello.ll

; To emit LLVM from C code (for discovery):
; clang -emit-llvm -S hello.c -o hello.ll

; Declare the printf function
declare i32 @printf(i8*, ...)

@.str = private unnamed_addr constant [14 x i8] c"hello world!\0A\00"

define i32 @main() noinline optnone {
  call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([14 x i8], [14 x i8]* @.str, i32 0, i32 0))
  ret i32 0
}

hello.sh

llc hello.ll && gcc -o hello hello.s && ./hello