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[dev.ssa] cmd/compile: Do pointer arithmetic with int, not uintptr

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Be more consistent about this.  There's no reason to do the
pointer arithmetic on a different type, as sizeof(int) >=
sizeof(ptr) on all of our platforms.  It simplifies our
rewrite rules also, except for a few that need duplication.

Add some more constant folding to get constant indexing and
slicing to fold down to nothing.

Change-Id: I3e56cdb14b3dc1a6a0514f0333e883f92c19e3c7
Reviewed-on: https://go-review.googlesource.com/16586
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: David Chase <drchase@google.com>
This commit is contained in:
Keith Randall 2015-11-02 21:28:13 -08:00
parent 991873116e
commit 582baae22a
10 changed files with 448 additions and 199 deletions
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4
src/cmd/compile/internal/ssa/func.go
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@ -297,10 +297,6 @@ func (f *Func) ConstInt64(line int32, t Type, c int64) *Value {
// TODO: cache?
return f.Entry.NewValue0I(line, OpConst64, t, c)
}
func (f *Func) ConstIntPtr(line int32, t Type, c int64) *Value {
// TODO: cache?
return f.Entry.NewValue0I(line, OpConstPtr, t, c)
}
func (f *Func) ConstFloat32(line int32, t Type, c float64) *Value {
// TODO: cache?
return f.Entry.NewValue0I(line, OpConst32F, t, int64(math.Float64bits(c)))