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53 lines
1.0 KiB
LLVM
53 lines
1.0 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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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}:1
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br i1 %1, 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}:1
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br i1 %1, 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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%Result2 = trunc i63 %Result to i32
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ret i32 %Result2
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end
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