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compiler,runtime: use the size hint when creating a new map

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It defaults to hint/8 number of buckets. This number may be tuned in the
future.
This commit is contained in:
Ayke van Laethem
2019-05-13 16:38:58 +02:00
committed by Ron Evans
parent 17c42810d0
commit 55fc7b904a
4 changed files with 34 additions and 5 deletions
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compiler/compiler.go
+10 -1
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@@ -1425,7 +1425,16 @@ func (c *Compiler) parseExpr(frame *Frame, expr ssa.Value) (llvm.Value, error) {
valueSize := c.targetData.TypeAllocSize(llvmValueType)
llvmKeySize := llvm.ConstInt(c.ctx.Int8Type(), keySize, false)
llvmValueSize := llvm.ConstInt(c.ctx.Int8Type(), valueSize, false)
hashmap := c.createRuntimeCall("hashmapMake", []llvm.Value{llvmKeySize, llvmValueSize}, "")
sizeHint := llvm.ConstInt(c.uintptrType, 8, false)
if expr.Reserve != nil {
sizeHint = c.getValue(frame, expr.Reserve)
var err error
sizeHint, err = c.parseConvert(expr.Reserve.Type(), types.Typ[types.Uintptr], sizeHint, expr.Pos())
if err != nil {
return llvm.Value{}, err
}
}
hashmap := c.createRuntimeCall("hashmapMake", []llvm.Value{llvmKeySize, llvmValueSize, sizeHint}, "")
return hashmap, nil
case *ssa.MakeSlice:
sliceLen := c.getValue(frame, expr.Len)