HelloWorld code

[KKimj]

clang -S -emit-llvm ./tests/helloworld/main.c -o ./test/helloworld/main.ll

opt -S -O2 -aa -basicaa -tbaa -licm ./tests/helloworld/main.ll -o ./tests/helloworld/main.ll

llc ./tests/helloworld/main.ll -o ./tests/helloworld/main.s

clang ./tests/helloworld/main.s -o ./tests/helloworld/main

[KKimj]

main IR

; ModuleID = 'main.c'
source_filename = "main.c"
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-linux-gnu"

@.str = private unnamed_addr constant [7 x i8] c"%d :%s\00", align 1
@message = external global [0 x i8], align 1
@.str.1 = private unnamed_addr constant [2 x i8] c"\0A\00", align 1

; Function Attrs: noinline nounwind optnone uwtable
define i32 @main() #0 {
  %1 = alloca i32, align 4
  %2 = alloca i32, align 4
  store i32 0, i32* %1, align 4
  store i32 1, i32* %2, align 4
  br label %3

; <label>:3:                                      ; preds = %10, %0
  %4 = load i32, i32* %2, align 4
  %5 = icmp sle i32 %4, 10
  br i1 %5, label %6, label %13

; <label>:6:                                      ; preds = %3
  %7 = load i32, i32* %2, align 4
  %8 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([7 x i8], [7 x i8]* @.str, i32 0, i32 0), i32 %7, i8* getelementptr inbounds ([0 x i8], [0 x i8]* @message, i32 0, i32 0))
  %9 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([2 x i8], [2 x i8]* @.str.1, i32 0, i32 0))
  call void (...) @print_hello_world()
  br label %10

; <label>:10:                                     ; preds = %6
  %11 = load i32, i32* %2, align 4
  %12 = add nsw i32 %11, 1
  store i32 %12, i32* %2, align 4
  br label %3

; <label>:13:                                     ; preds = %3
  ret i32 0
}

declare i32 @printf(i8*, ...) #1

declare void @print_hello_world(...) #1

attributes #0 = { noinline nounwind optnone uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }

!llvm.module.flags = !{!0}
!llvm.ident = !{!1}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{!"clang version 6.0.0-1ubuntu2 (tags/RELEASE_600/final)"}

[KKimj]

Helloworld IR

; ModuleID = 'helloworld.c'
source_filename = "helloworld.c"
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64-pc-linux-gnu"

@message = global [13 x i8] c"Hello World!\00", align 1
@.str = private unnamed_addr constant [8 x i8] c"%d :%s\0A\00", align 1

; Function Attrs: noinline nounwind optnone uwtable
define void @print_hello_world() #0 {
  %1 = alloca i32, align 4
  store i32 1, i32* %1, align 4
  br label %2

; <label>:2:                                      ; preds = %8, %0
  %3 = load i32, i32* %1, align 4
  %4 = icmp sle i32 %3, 10
  br i1 %4, label %5, label %11

; <label>:5:                                      ; preds = %2
  %6 = load i32, i32* %1, align 4
  %7 = call i32 (i8*, ...) @printf(i8* getelementptr inbounds ([8 x i8], [8 x i8]* @.str, i32 0, i32 0), i32 %6, i8* getelementptr inbounds ([13 x i8], [13 x i8]* @message, i32 0, i32 0))
  br label %8

; <label>:8:                                      ; preds = %5
  %9 = load i32, i32* %1, align 4
  %10 = add nsw i32 %9, 1
  store i32 %10, i32* %1, align 4
  br label %2

; <label>:11:                                     ; preds = %2
  ret void
}

declare i32 @printf(i8*, ...) #1

attributes #0 = { noinline nounwind optnone uwtable "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-jump-tables"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }
attributes #1 = { "correctly-rounded-divide-sqrt-fp-math"="false" "disable-tail-calls"="false" "less-precise-fpmad"="false" "no-frame-pointer-elim"="true" "no-frame-pointer-elim-non-leaf" "no-infs-fp-math"="false" "no-nans-fp-math"="false" "no-signed-zeros-fp-math"="false" "no-trapping-math"="false" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+fxsr,+mmx,+sse,+sse2,+x87" "unsafe-fp-math"="false" "use-soft-float"="false" }

!llvm.module.flags = !{!0}
!llvm.ident = !{!1}

!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{!"clang version 6.0.0-1ubuntu2 (tags/RELEASE_600/final)"}