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Fibonacci C vs. Odin
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| define dso_local i64 @fib(i64 %0) #0 { | |
| %2 = alloca i64, align 8 | |
| %3 = alloca i64, align 8 | |
| store i64 %0, i64* %3, align 8 | |
| %4 = load i64, i64* %3, align 8 | |
| %5 = icmp eq i64 %4, 0 | |
| br i1 %5, label %6, label %7 | |
| 6: ; preds = %1 | |
| store i64 0, i64* %2, align 8 | |
| br label %19 | |
| 7: ; preds = %1 | |
| %8 = load i64, i64* %3, align 8 | |
| %9 = icmp eq i64 %8, 1 | |
| br i1 %9, label %10, label %11 | |
| 10: ; preds = %7 | |
| store i64 1, i64* %2, align 8 | |
| br label %19 | |
| 11: ; preds = %7 | |
| %12 = load i64, i64* %3, align 8 | |
| %13 = sub i64 %12, 1 | |
| %14 = call i64 @fib(i64 %13) | |
| %15 = load i64, i64* %3, align 8 | |
| %16 = sub i64 %15, 2 | |
| %17 = call i64 @fib(i64 %16) | |
| %18 = add i64 %14, %17 | |
| store i64 %18, i64* %2, align 8 | |
| br label %19 | |
| 19: ; preds = %11, %10, %6 | |
| %20 = load i64, i64* %2, align 8 | |
| ret i64 %20 | |
| } | |
| define dso_local i64 @fib2(i64 %0) #0 { | |
| %2 = alloca i64, align 8 | |
| %3 = alloca i64, align 8 | |
| %4 = alloca i64, align 8 | |
| %5 = alloca i64, align 8 | |
| store i64 %0, i64* %2, align 8 | |
| store i64 0, i64* %3, align 8 | |
| store i64 1, i64* %4, align 8 | |
| br label %6 | |
| 6: ; preds = %10, %1 | |
| %7 = load i64, i64* %2, align 8 | |
| %8 = add i64 %7, -1 | |
| store i64 %8, i64* %2, align 8 | |
| %9 = icmp ne i64 %7, 0 | |
| br i1 %9, label %10, label %16 | |
| 10: ; preds = %6 | |
| %11 = load i64, i64* %4, align 8 | |
| store i64 %11, i64* %5, align 8 | |
| %12 = load i64, i64* %3, align 8 | |
| %13 = load i64, i64* %4, align 8 | |
| %14 = add i64 %12, %13 | |
| store i64 %14, i64* %4, align 8 | |
| %15 = load i64, i64* %5, align 8 | |
| store i64 %15, i64* %3, align 8 | |
| br label %6 | |
| 16: ; preds = %6 | |
| %17 = load i64, i64* %3, align 8 | |
| ret i64 %17 | |
| } |
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| fib: | |
| .LFB0: | |
| .cfi_startproc | |
| pushq %rbp | |
| .cfi_def_cfa_offset 16 | |
| .cfi_offset 6, -16 | |
| movq %rsp, %rbp | |
| .cfi_def_cfa_register 6 | |
| pushq %rbx | |
| subq $24, %rsp | |
| .cfi_offset 3, -24 | |
| movq %rdi, -24(%rbp) | |
| cmpq $0, -24(%rbp) | |
| jne .L2 | |
| movl $0, %eax | |
| jmp .L3 | |
| .L2: | |
| cmpq $1, -24(%rbp) | |
| jne .L4 | |
| movl $1, %eax | |
| jmp .L3 | |
| .L4: | |
| movq -24(%rbp), %rax | |
| subq $1, %rax | |
| movq %rax, %rdi | |
| call fib | |
| movq %rax, %rbx | |
| movq -24(%rbp), %rax | |
| subq $2, %rax | |
| movq %rax, %rdi | |
| call fib | |
| addq %rbx, %rax | |
| .L3: | |
| movq -8(%rbp), %rbx | |
| leave | |
| .cfi_def_cfa 7, 8 | |
| ret | |
| .cfi_endproc | |
| .LFE0: | |
| .size fib, .-fib | |
| .globl fib2 | |
| .type fib2, @function |
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| #include <stdio.h> | |
| unsigned long fib(unsigned long l) | |
| { | |
| if (l == 0) return 0; | |
| if (l == 1) return 1; | |
| return fib(l-1) + fib(l-2); | |
| } | |
| unsigned long fib2(unsigned long l) | |
| { | |
| unsigned long a, b, c; | |
| a = 0; b = 1; | |
| while (l--) | |
| { | |
| c = b; | |
| b = a + b; | |
| a = c; | |
| } | |
| return a; | |
| } | |
| int main(void) | |
| { | |
| unsigned long res = fib2(45); | |
| printf("%ld\n", res); | |
| return 0; | |
| } |
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| package main | |
| import "core:fmt" | |
| import "core:time" | |
| fib :: proc(l: u64) -> u64 | |
| { | |
| if l == 0 do return 0; | |
| if l == 1 do return 1; | |
| return fib(l - 1) + fib(l - 2); | |
| } | |
| fib2 :: proc(l: u64) -> u64 | |
| { | |
| l := l; | |
| a: u64 = 0; | |
| b: u64 = 1; | |
| c: u64 = ---; | |
| for (l != 0) | |
| { | |
| c = b; | |
| b = a + b; | |
| a = c; | |
| l -= 1; | |
| } | |
| return a; | |
| } | |
| main :: proc() | |
| { | |
| start := time.now(); | |
| res := fib(45); | |
| end := time.now(); | |
| fmt.println(res, time.duration_seconds(time.diff(start, end))); | |
| } |
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| define i64 @main.fib(i64 %_.0, %runtime.Context* noalias nonnull nocapture %__.context_ptr) #0 { | |
| decls-0: | |
| %0 = alloca i64, align 16 | |
| store i64 %_.0, i64* %0 | |
| ; IfStmt | |
| %1 = load i64, i64* %0, align 8 | |
| %2 = icmp eq i64 %1, 0 | |
| %3 = zext i1 %2 to i8 | |
| %4 = trunc i8 %3 to i1 | |
| br i1 %4, label %if.then-1, label %if.done-2 | |
| if.then-1: | |
| ; ReturnStmt | |
| ret i64 0 | |
| if.done-2: | |
| ; IfStmt | |
| %5 = load i64, i64* %0, align 8 | |
| %6 = icmp eq i64 %5, 1 | |
| %7 = zext i1 %6 to i8 | |
| %8 = trunc i8 %7 to i1 | |
| br i1 %8, label %if.then-3, label %if.done-4 | |
| if.then-3: | |
| ; ReturnStmt | |
| ret i64 1 | |
| if.done-4: | |
| ; ReturnStmt | |
| %9 = load i64, i64* %0, align 8 | |
| %10 = sub i64 %9, 1 | |
| %11 = call i64 @main.fib(i64 %10, %runtime.Context* noalias nonnull nocapture %__.context_ptr) | |
| %12 = load i64, i64* %0, align 8 | |
| %13 = sub i64 %12, 2 | |
| %14 = call i64 @main.fib(i64 %13, %runtime.Context* noalias nonnull nocapture %__.context_ptr) | |
| %15 = add i64 %11, %14 | |
| ret i64 %15 | |
| } | |
| define i64 @main.fib2(i64 %_.0, %runtime.Context* noalias nonnull nocapture %__.context_ptr) #0 { | |
| decls-0: | |
| %0 = alloca i64, align 16 | |
| %1 = alloca i64, align 16 | |
| %2 = alloca i64, align 16 | |
| %3 = alloca i64, align 16 | |
| %4 = alloca i64, align 16 | |
| store i64 %_.0, i64* %0 | |
| ; l | |
| ; ZeroInit | |
| store i64 zeroinitializer, i64* %1, align 1 | |
| %5 = load i64, i64* %0, align 8 | |
| store i64 %5, i64* %1 | |
| ; a | |
| ; ZeroInit | |
| store i64 zeroinitializer, i64* %2, align 1 | |
| store i64 0, i64* %2 | |
| ; b | |
| ; ZeroInit | |
| store i64 zeroinitializer, i64* %3, align 1 | |
| store i64 1, i64* %3 | |
| ; c | |
| ; ZeroInit | |
| store i64 zeroinitializer, i64* %4, align 1 | |
| store i64 undef, i64* %4 | |
| ; ForStmt | |
| br label %for.loop-1 | |
| for.loop-1: | |
| %6 = load i64, i64* %1, align 8 | |
| %7 = icmp ne i64 %6, 0 | |
| %8 = zext i1 %7 to i8 | |
| %9 = trunc i8 %8 to i1 | |
| br i1 %9, label %for.body-2, label %for.done-3 | |
| for.body-2: | |
| ; AssignStmt | |
| %10 = load i64, i64* %3, align 8 | |
| store i64 %10, i64* %4 | |
| ; AssignStmt | |
| %11 = load i64, i64* %2, align 8 | |
| %12 = load i64, i64* %3, align 8 | |
| %13 = add i64 %11, %12 | |
| store i64 %13, i64* %3 | |
| ; AssignStmt | |
| %14 = load i64, i64* %4, align 8 | |
| store i64 %14, i64* %2 | |
| ; AssignStmt | |
| %15 = load i64, i64* %1, align 8 | |
| %16 = sub i64 %15, 1 | |
| store i64 %16, i64* %1 | |
| br label %for.loop-1 | |
| for.done-3: | |
| ; ReturnStmt | |
| %17 = load i64, i64* %2, align 8 | |
| ret i64 %17 | |
| } |
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| main.fib: # @main.fib | |
| .cfi_startproc | |
| # %bb.0: # %decls-0 | |
| pushq %r14 | |
| .cfi_def_cfa_offset 16 | |
| pushq %rbx | |
| .cfi_def_cfa_offset 24 | |
| pushq %rax | |
| .cfi_def_cfa_offset 32 | |
| .cfi_offset %rbx, -24 | |
| .cfi_offset %r14, -16 | |
| movq %rdi, (%rsp) | |
| testq %rdi, %rdi | |
| jne .LBB74_3 | |
| # %bb.1: # %if.then-1 | |
| xorl %eax, %eax | |
| jmp .LBB74_2 | |
| .LBB74_3: # %if.done-2 | |
| cmpq $1, (%rsp) | |
| jne .LBB74_5 | |
| # %bb.4: # %if.then-3 | |
| movl $1, %eax | |
| jmp .LBB74_2 | |
| .LBB74_5: # %if.done-4 | |
| movq %rsi, %rbx | |
| movq (%rsp), %rdi | |
| decq %rdi | |
| callq main.fib | |
| movq %rax, %r14 | |
| movq (%rsp), %rdi | |
| addq $-2, %rdi | |
| movq %rbx, %rsi | |
| callq main.fib | |
| addq %r14, %rax | |
| .LBB74_2: # %if.then-1 | |
| addq $8, %rsp | |
| .cfi_def_cfa_offset 24 | |
| popq %rbx | |
| .cfi_def_cfa_offset 16 | |
| popq %r14 | |
| .cfi_def_cfa_offset 8 | |
| retq | |
| .Lfunc_end74: | |
| .size main.fib, .Lfunc_end74-main.fib | |
| .cfi_endproc |
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