2e7d06bc7a
In jump-table-like constructs, the natural way of writing the code can sometimes produce redundant jumps or labels. Therefore some basic cleanup steps have been proposed. This diff adds two transforms: 1. Remove unconditional jumps to a label immediately following. 2. Remove labels with no references at all. Fixes #75
29 lines
415 B
Go
29 lines
415 B
Go
// +build ignore
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package main
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import (
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. "github.com/mmcloughlin/avo/build"
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. "github.com/mmcloughlin/avo/operand"
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. "github.com/mmcloughlin/avo/reg"
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)
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func main() {
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TEXT("Labels", NOSPLIT, "func() uint64")
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XORQ(RAX, RAX)
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INCQ(RAX)
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Label("neverused")
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INCQ(RAX)
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INCQ(RAX)
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INCQ(RAX)
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INCQ(RAX)
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JMP(LabelRef("next"))
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Label("next")
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INCQ(RAX)
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INCQ(RAX)
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Store(RAX, ReturnIndex(0))
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RET()
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Generate()
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}
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