57c23b967e
In some cases natural use of abstraction in avo programs can lead to redundant move instructions, specifically self-moves such as MOVQ AX, AX. This does not produce incorrect code but it is incorrect and inelegant. This diff introduces a PruneSelfMoves pass that removes such unnecessary instructions. Closes #76
37 lines
733 B
Go
37 lines
733 B
Go
package pass_test
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import (
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"testing"
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"github.com/mmcloughlin/avo/build"
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"github.com/mmcloughlin/avo/internal/test"
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"github.com/mmcloughlin/avo/ir"
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"github.com/mmcloughlin/avo/pass"
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)
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// BuildFunction is a helper to compile a build context containing a single
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// function and (optionally) apply a list of FunctionPasses to it.
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func BuildFunction(t *testing.T, ctx *build.Context, passes ...pass.FunctionPass) *ir.Function {
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t.Helper()
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f, err := ctx.Result()
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if err != nil {
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build.LogError(test.Logger(t), err, 0)
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t.FailNow()
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}
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fns := f.Functions()
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if len(fns) != 1 {
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t.Fatalf("expect 1 function")
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}
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fn := fns[0]
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for _, p := range passes {
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if err := p(fn); err != nil {
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t.Fatal(err)
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}
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}
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return fn
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}
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