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https://github.com/c64scene-ar/llvm-6502.git
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c0948366f6
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@33259 91177308-0d34-0410-b5e6-96231b3b80d8
55 lines
1.1 KiB
LLVM
55 lines
1.1 KiB
LLVM
; RUN: llvm-as %s -o - | llvm-dis > %t1.ll
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; RUN: llvm-as %t1.ll -o - | llvm-dis > %t2.ll
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; RUN: diff %t1.ll %t2.ll
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implementation
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declare i32 "atoi"(i8 *)
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define i63 "fib"(i63 %n)
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begin
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icmp ult i63 %n, 2 ; {i1}:0
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br i1 %0, label %BaseCase, label %RecurseCase
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BaseCase:
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ret i63 1
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RecurseCase:
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%n2 = sub i63 %n, 2
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%n1 = sub i63 %n, 1
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%f2 = call i63(i63) * %fib(i63 %n2)
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%f1 = call i63(i63) * %fib(i63 %n1)
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%result = add i63 %f2, %f1
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ret i63 %result
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end
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define i63 "realmain"(i32 %argc, i8 ** %argv)
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begin
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icmp eq i32 %argc, 2 ; {i1}:0
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br i1 %0, label %HasArg, label %Continue
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HasArg:
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; %n1 = atoi(argv[1])
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%n1 = add i32 1, 1
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br label %Continue
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Continue:
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%n = phi i32 [%n1, %HasArg], [1, %0]
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%N = sext i32 %n to i63
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%F = call i63(i63) *%fib(i63 %N)
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ret i63 %F
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end
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define i63 "trampoline"(i63 %n, i63(i63)* %fibfunc)
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begin
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%F = call i63(i63) *%fibfunc(i63 %n)
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ret i63 %F
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end
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define i32 "main"()
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begin
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%Result = call i63 %trampoline(i63 10, i63(i63) *%fib)
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%Result = trunc i63 %Result to i32
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ret i32 %Result
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end
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