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55 lines
1.2 KiB
LLVM
55 lines
1.2 KiB
LLVM
; RUN: llvm-as < %s | llc
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implementation
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declare sbyte* %llvm_gc_allocate(uint)
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declare void %llvm_gc_initialize(uint)
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declare void %llvm.gcroot(sbyte**, sbyte*)
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declare void %llvm.gcwrite(sbyte*, sbyte*, sbyte**)
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int %main() {
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entry:
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%A = alloca sbyte*
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%B = alloca sbyte**
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call void %llvm_gc_initialize(uint 1048576) ; Start with 1MB heap
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;; void *A;
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call void %llvm.gcroot(sbyte** %A, sbyte* null)
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;; A = gcalloc(10);
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%Aptr = call sbyte* %llvm_gc_allocate(uint 10)
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store sbyte* %Aptr, sbyte** %A
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;; void **B;
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%tmp.1 = cast sbyte*** %B to sbyte **
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call void %llvm.gcroot(sbyte** %tmp.1, sbyte* null)
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;; B = gcalloc(4);
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%B = call sbyte* %llvm_gc_allocate(uint 8)
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%tmp.2 = cast sbyte* %B to sbyte**
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store sbyte** %tmp.2, sbyte*** %B
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;; *B = A;
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%B.1 = load sbyte*** %B
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%A.1 = load sbyte** %A
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call void %llvm.gcwrite(sbyte* %A.1, sbyte* %B, sbyte** %B.1)
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br label %AllocLoop
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AllocLoop:
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%i = phi uint [ 0, %entry ], [ %indvar.next, %AllocLoop ]
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;; Allocated mem: allocated memory is immediately dead.
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call sbyte* %llvm_gc_allocate(uint 100)
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%indvar.next = add uint %i, 1
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%exitcond = seteq uint %indvar.next, 10000000
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br bool %exitcond, label %Exit, label %AllocLoop
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Exit:
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ret int 0
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}
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declare void %__main()
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