52 строки
1,7 КиБ
LLVM
52 строки
1,7 КиБ
LLVM
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
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target triple = "wasm32-unknown-unknown-wasm"
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%runtime.stackChainObject = type { %runtime.stackChainObject*, i32 }
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@runtime.stackChainStart = external global %runtime.stackChainObject*
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@someGlobal = global i8 3
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declare void @runtime.trackPointer(i8* nocapture readonly)
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declare noalias nonnull i8* @runtime.alloc(i32)
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; Generic function that returns a pointer (that must be tracked).
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define i8* @getPointer() {
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ret i8* @someGlobal
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}
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define i8* @needsStackSlots() {
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; Tracked pointer. Although, in this case the value is immediately returned
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; so tracking it is not really necessary.
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%ptr = call i8* @runtime.alloc(i32 4)
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call void @runtime.trackPointer(i8* %ptr)
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ret i8* %ptr
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}
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; Check some edge cases of pointer tracking.
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define i8* @needsStackSlots2() {
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; Only one stack slot should be created for this (but at the moment, one is
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; created for each call to runtime.trackPointer).
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%ptr1 = call i8* @getPointer()
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call void @runtime.trackPointer(i8* %ptr1)
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call void @runtime.trackPointer(i8* %ptr1)
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call void @runtime.trackPointer(i8* %ptr1)
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; Create a pointer that does not need to be tracked (but is tracked).
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%ptr2 = getelementptr i8, i8* @someGlobal, i32 0
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call void @runtime.trackPointer(i8* %ptr2)
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; Here is finally the point where an allocation happens.
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%unused = call i8* @runtime.alloc(i32 4)
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call void @runtime.trackPointer(i8* %unused)
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ret i8* %ptr1
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}
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; Return a pointer from a caller. Because it doesn't allocate, no stack objects
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; need to be created.
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define i8* @noAllocatingFunction() {
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%ptr = call i8* @getPointer()
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call void @runtime.trackPointer(i8* %ptr)
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ret i8* %ptr
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}
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