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WIP: precise GC

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Ayke van Laethem
2019-02-19 12:40:30 +01:00
parent 1b4d71bd3d
commit a1e69bbc13
7 changed files with 239 additions and 4 deletions
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compiler/wordpack.go
+3 -3
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@@ -25,7 +25,7 @@ func (c *Compiler) emitPointerPack(values []llvm.Value) llvm.Value {
return llvm.ConstPointerNull(c.i8ptrType)
} else if len(values) == 1 && values[0].Type().TypeKind() == llvm.PointerTypeKind {
return c.builder.CreateBitCast(values[0], c.i8ptrType, "pack.ptr")
} else if size <= c.targetData.TypeAllocSize(c.i8ptrType) {
} else if size <= c.targetData.TypeAllocSize(c.i8ptrType) && !c.gcIsPrecise() {
// Packed data fits in a pointer, so store it directly inside the
// pointer.
if len(values) == 1 && values[0].Type().TypeKind() == llvm.IntegerTypeKind {
@@ -57,7 +57,7 @@ func (c *Compiler) emitPointerPack(values []llvm.Value) llvm.Value {
return c.builder.CreateLoad(packedAlloc, "")
} else {
// Get the original heap allocation pointer, which already is an *i8.
return packedHeapAlloc
return c.builder.CreateBitCast(packedAlloc, c.i8ptrType, "")
}
}
@@ -73,7 +73,7 @@ func (c *Compiler) emitPointerUnpack(ptr llvm.Value, valueTypes []llvm.Type) []l
} else if len(valueTypes) == 1 && valueTypes[0].TypeKind() == llvm.PointerTypeKind {
// A single pointer is always stored directly.
return []llvm.Value{c.builder.CreateBitCast(ptr, valueTypes[0], "unpack.ptr")}
} else if size <= c.targetData.TypeAllocSize(c.i8ptrType) {
} else if size <= c.targetData.TypeAllocSize(c.i8ptrType) && !c.gcIsPrecise() {
// Packed data stored directly in pointer.
if len(valueTypes) == 1 && valueTypes[0].TypeKind() == llvm.IntegerTypeKind {
// Keep this cast in SSA form.