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cmd/compile: log Ctz non-zero proofs

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I forgot this in CL 109358.

Change-Id: Ia5e8bd9cf43393f098b101a0d6a0c526e3e4f101
Reviewed-on: https://go-review.googlesource.com/109775
Run-TryBot: Josh Bleecher Snyder <josharian@gmail.com>
TryBot-Result: Gobot Gobot <gobot@golang.org>
Reviewed-by: Brad Fitzpatrick <bradfitz@golang.org>
This commit is contained in:
Josh Bleecher Snyder 2018-04-26 15:46:12 -07:00
parent 6b55407d2f
commit b9785fc844
1 changed files with 3 additions and 0 deletions
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3
src/cmd/compile/internal/ssa/prove.go
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@ -774,6 +774,9 @@ func simplifyBlock(sdom SparseTree, ft *factsTable, b *Block) {
continue
}
if lim.umin > 0 || lim.min > 0 || lim.max < 0 {
if b.Func.pass.debug > 0 {
b.Func.Warnl(v.Pos, "Proved %v non-zero", v.Op)
}
v.Op = ctzNonZeroOp[v.Op]
}
}