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50 lines
1.6 KiB
LLVM
50 lines
1.6 KiB
LLVM
; RUN: llvm-as < %s | 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 i64 @fib(i64 %n) {
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icmp ult i64 %n, 2 ; <i1>:1 [#uses=1]
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br i1 %1, label %BaseCase, label %RecurseCase
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BaseCase: ; preds = %0
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ret i64 1
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RecurseCase: ; preds = %0
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%n2 = sub i64 %n, 2 ; <i64> [#uses=1]
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%n1 = sub i64 %n, 1 ; <i64> [#uses=1]
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%f2 = call i64 @fib( i64 %n2 ) ; <i64> [#uses=1]
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%f1 = call i64 @fib( i64 %n1 ) ; <i64> [#uses=1]
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%result = add i64 %f2, %f1 ; <i64> [#uses=1]
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ret i64 %result
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}
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define i64 @realmain(i32 %argc, i8** %argv) {
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; <label>:0
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icmp eq i32 %argc, 2 ; <i1>:1 [#uses=1]
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br i1 %1, label %HasArg, label %Continue
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HasArg: ; preds = %0
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%n1 = add i32 1, 1 ; <i32> [#uses=1]
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br label %Continue
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Continue: ; preds = %HasArg, %0
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%n = phi i32 [ %n1, %HasArg ], [ 1, %0 ] ; <i32> [#uses=1]
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%N = sext i32 %n to i64 ; <i64> [#uses=1]
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%F = call i64 @fib( i64 %N ) ; <i64> [#uses=1]
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ret i64 %F
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}
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define i64 @trampoline(i64 %n, i64 (i64)* %fibfunc) {
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%F = call i64 %fibfunc( i64 %n ) ; <i64> [#uses=1]
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ret i64 %F
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}
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define i32 @main() {
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%Result = call i64 @trampoline( i64 10, i64 (i64)* @fib ) ; <i64> [#uses=1]
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%Result.upgrd.1 = trunc i64 %Result to i32 ; <i32> [#uses=1]
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ret i32 %Result.upgrd.1
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}
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