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cmd/compile/internal/walk: merge operations when calling ir.NewSlic…
Change-Id: I55ef35a9d8157063c4a41b23cd1ac0002838d30a
GitHub-Last-Rev: e716c52005
GitHub-Pull-Request: golang/go#45814
Reviewed-on: https://go-review.googlesource.com/c/go/+/314569
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Reviewed-by: Matthew Dempsky <mdempsky@google.com>
Trust: Cuong Manh Le <cuong.manhle.vn@gmail.com>
Trust: Matthew Dempsky <mdempsky@google.com>
Run-TryBot: Matthew Dempsky <mdempsky@google.com>
TryBot-Result: Go Bot <gobot@golang.org>
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@ -421,16 +421,13 @@ func walkMakeSlice(n *ir.MakeExpr, init *ir.Nodes) ir.Node {
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fnname = "makeslice"
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argtype = types.Types[types.TINT]
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}
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m := ir.NewSliceHeaderExpr(base.Pos, nil, nil, nil, nil)
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m.SetType(t)
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fn := typecheck.LookupRuntime(fnname)
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m.Ptr = mkcall1(fn, types.Types[types.TUNSAFEPTR], init, reflectdata.TypePtr(t.Elem()), typecheck.Conv(len, argtype), typecheck.Conv(cap, argtype))
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m.Ptr.MarkNonNil()
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m.Len = typecheck.Conv(len, types.Types[types.TINT])
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m.Cap = typecheck.Conv(cap, types.Types[types.TINT])
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return walkExpr(typecheck.Expr(m), init)
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ptr := mkcall1(fn, types.Types[types.TUNSAFEPTR], init, reflectdata.TypePtr(t.Elem()), typecheck.Conv(len, argtype), typecheck.Conv(cap, argtype))
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ptr.MarkNonNil()
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len = typecheck.Conv(len, types.Types[types.TINT])
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cap = typecheck.Conv(cap, types.Types[types.TINT])
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sh := ir.NewSliceHeaderExpr(base.Pos, t, ptr, len, cap)
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return walkExpr(typecheck.Expr(sh), init)
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}
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// walkMakeSliceCopy walks an OMAKESLICECOPY node.
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@ -459,12 +456,9 @@ func walkMakeSliceCopy(n *ir.MakeExpr, init *ir.Nodes) ir.Node {
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// instantiate mallocgc(size uintptr, typ *byte, needszero bool) unsafe.Pointer
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fn := typecheck.LookupRuntime("mallocgc")
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sh := ir.NewSliceHeaderExpr(base.Pos, nil, nil, nil, nil)
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sh.Ptr = mkcall1(fn, types.Types[types.TUNSAFEPTR], init, size, typecheck.NodNil(), ir.NewBool(false))
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sh.Ptr.MarkNonNil()
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sh.Len = length
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sh.Cap = length
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sh.SetType(t)
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ptr := mkcall1(fn, types.Types[types.TUNSAFEPTR], init, size, typecheck.NodNil(), ir.NewBool(false))
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ptr.MarkNonNil()
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sh := ir.NewSliceHeaderExpr(base.Pos, t, ptr, length, length)
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s := typecheck.Temp(t)
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r := typecheck.Stmt(ir.NewAssignStmt(base.Pos, s, sh))
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@ -482,13 +476,10 @@ func walkMakeSliceCopy(n *ir.MakeExpr, init *ir.Nodes) ir.Node {
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// Replace make+copy with runtime.makeslicecopy.
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// instantiate makeslicecopy(typ *byte, tolen int, fromlen int, from unsafe.Pointer) unsafe.Pointer
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fn := typecheck.LookupRuntime("makeslicecopy")
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s := ir.NewSliceHeaderExpr(base.Pos, nil, nil, nil, nil)
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s.Ptr = mkcall1(fn, types.Types[types.TUNSAFEPTR], init, reflectdata.TypePtr(t.Elem()), length, copylen, typecheck.Conv(copyptr, types.Types[types.TUNSAFEPTR]))
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s.Ptr.MarkNonNil()
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s.Len = length
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s.Cap = length
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s.SetType(t)
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return walkExpr(typecheck.Expr(s), init)
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ptr := mkcall1(fn, types.Types[types.TUNSAFEPTR], init, reflectdata.TypePtr(t.Elem()), length, copylen, typecheck.Conv(copyptr, types.Types[types.TUNSAFEPTR]))
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ptr.MarkNonNil()
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sh := ir.NewSliceHeaderExpr(base.Pos, t, ptr, length, length)
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return walkExpr(typecheck.Expr(sh), init)
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}
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// walkNew walks an ONEW node.
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