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annotate test/CodeGen/X86/GC/alloc_loop.ll @ 121:803732b1fca8

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LLVM 5.0
author kono
date Fri, 27 Oct 2017 17:07:41 +0900
parents afa8332a0e37
children
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1 ; RUN: llc < %s
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2 ; REQUIRES: default_triple
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5 declare i8* @llvm_gc_allocate(i32)
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6 declare void @llvm_gc_initialize(i32)
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8 declare void @llvm.gcroot(i8**, i8*)
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9 declare void @llvm.gcwrite(i8*, i8*, i8**)
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11 define i32 @main() gc "shadow-stack" {
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12 entry:
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13 %A = alloca i8*
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14 %B = alloca i8**
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16 call void @llvm_gc_initialize(i32 1048576) ; Start with 1MB heap
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18 ;; void *A;
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19 call void @llvm.gcroot(i8** %A, i8* null)
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21 ;; A = gcalloc(10);
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22 %Aptr = call i8* @llvm_gc_allocate(i32 10)
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23 store i8* %Aptr, i8** %A
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25 ;; void **B;
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26 %tmp.1 = bitcast i8*** %B to i8**
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27 call void @llvm.gcroot(i8** %tmp.1, i8* null)
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29 ;; B = gcalloc(4);
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30 %B.upgrd.1 = call i8* @llvm_gc_allocate(i32 8)
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31 %tmp.2 = bitcast i8* %B.upgrd.1 to i8**
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32 store i8** %tmp.2, i8*** %B
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34 ;; *B = A;
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35 %B.1 = load i8**, i8*** %B
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36 %A.1 = load i8*, i8** %A
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37 call void @llvm.gcwrite(i8* %A.1, i8* %B.upgrd.1, i8** %B.1)
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39 br label %AllocLoop
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41 AllocLoop:
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42 %i = phi i32 [ 0, %entry ], [ %indvar.next, %AllocLoop ]
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43 ;; Allocated mem: allocated memory is immediately dead.
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44 call i8* @llvm_gc_allocate(i32 100)
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46 %indvar.next = add i32 %i, 1
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47 %exitcond = icmp eq i32 %indvar.next, 10000000
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48 br i1 %exitcond, label %Exit, label %AllocLoop
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50 Exit:
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51 ret i32 0
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52 }
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54 declare void @__main()