51 lines
1.1 KiB
LLVM
51 lines
1.1 KiB
LLVM
; RUN: llc -mtriple=x86_64 < %s
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declare ptr @llvm_gc_allocate(i32)
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declare void @llvm_gc_initialize(i32)
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declare void @llvm.gcroot(ptr, ptr)
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declare void @llvm.gcwrite(ptr, ptr, ptr)
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define i32 @main() gc "shadow-stack" {
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entry:
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%A = alloca ptr
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%B = alloca ptr
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call void @llvm_gc_initialize(i32 1048576) ; Start with 1MB heap
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;; ptr A;
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call void @llvm.gcroot(ptr %A, ptr null)
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;; A = gcalloc(10);
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%Aptr = call ptr @llvm_gc_allocate(i32 10)
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store ptr %Aptr, ptr %A
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;; ptr B;
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call void @llvm.gcroot(ptr %B, ptr null)
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;; B = gcalloc(4);
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%B.upgrd.1 = call ptr @llvm_gc_allocate(i32 8)
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store ptr %B.upgrd.1, ptr %B
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;; *B = A;
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%B.1 = load ptr, ptr %B
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%A.1 = load ptr, ptr %A
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call void @llvm.gcwrite(ptr %A.1, ptr %B.upgrd.1, ptr %B.1)
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br label %AllocLoop
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AllocLoop:
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%i = phi i32 [ 0, %entry ], [ %indvar.next, %AllocLoop ]
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;; Allocated mem: allocated memory is immediately dead.
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call ptr @llvm_gc_allocate(i32 100)
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%indvar.next = add i32 %i, 1
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%exitcond = icmp eq i32 %indvar.next, 10000000
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br i1 %exitcond, label %Exit, label %AllocLoop
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Exit:
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ret i32 0
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}
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declare void @__main()
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