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| author | Bryan C. Mills <bcmills@google.com> | 2019-08-28 12:42:37 +0000 |
|---|---|---|
| committer | Bryan C. Mills <bcmills@google.com> | 2019-08-28 12:57:59 +0000 |
| commit | 372b0eed175b88ba2654607b05a36416f08c4cea (patch) | |
| tree | 70cf67d1f084fc93cfb4375ff2c077959c3e5cc6 /src/cmd/compile/internal/ssa/rewrite386.go | |
| parent | bc92fe8b340c302db970fe8a42c8fcf6ccf7141a (diff) | |
| download | go-372b0eed175b88ba2654607b05a36416f08c4cea.tar.gz go-372b0eed175b88ba2654607b05a36416f08c4cea.zip | |
Revert "cmd/compile: optimize 386's math.bits.TrailingZeros16"
This reverts CL 189277.
Reason for revert: broke 32-bit builders.
Updates #33902
Change-Id: Ie5f180d0371a90e5057ed578c334372e5fc3a286
Reviewed-on: https://go-review.googlesource.com/c/go/+/192097
Run-TryBot: Bryan C. Mills <bcmills@google.com>
Reviewed-by: Daniel Martà <mvdan@mvdan.cc>
Diffstat (limited to 'src/cmd/compile/internal/ssa/rewrite386.go')
| -rw-r--r-- | src/cmd/compile/internal/ssa/rewrite386.go | 18 |
1 files changed, 0 insertions, 18 deletions
diff --git a/src/cmd/compile/internal/ssa/rewrite386.go b/src/cmd/compile/internal/ssa/rewrite386.go index 2336561560..812aa9420d 100644 --- a/src/cmd/compile/internal/ssa/rewrite386.go +++ b/src/cmd/compile/internal/ssa/rewrite386.go @@ -360,8 +360,6 @@ func rewriteValue386(v *Value) bool { return rewriteValue386_OpConstBool_0(v) case OpConstNil: return rewriteValue386_OpConstNil_0(v) - case OpCtz16: - return rewriteValue386_OpCtz16_0(v) case OpCvt32Fto32: return rewriteValue386_OpCvt32Fto32_0(v) case OpCvt32Fto64F: @@ -20785,22 +20783,6 @@ func rewriteValue386_OpConstNil_0(v *Value) bool { return true } } -func rewriteValue386_OpCtz16_0(v *Value) bool { - b := v.Block - typ := &b.Func.Config.Types - // match: (Ctz16 x) - // cond: - // result: (BSFL (ORLconst <typ.UInt32> [0x10000] x)) - for { - x := v.Args[0] - v.reset(Op386BSFL) - v0 := b.NewValue0(v.Pos, Op386ORLconst, typ.UInt32) - v0.AuxInt = 0x10000 - v0.AddArg(x) - v.AddArg(v0) - return true - } -} func rewriteValue386_OpCvt32Fto32_0(v *Value) bool { // match: (Cvt32Fto32 x) // cond: |