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cmd: remove dead code

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Fixes #74076

Change-Id: Icc67b3d4e342f329584433bd1250c56ae8f5a73d
Reviewed-on: https://go-review.googlesource.com/c/go/+/690635
Reviewed-by: Alan Donovan <adonovan@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
Commit-Queue: Alan Donovan <adonovan@google.com>
Reviewed-by: Keith Randall <khr@golang.org>
Reviewed-by: Keith Randall <khr@google.com>
Auto-Submit: Alan Donovan <adonovan@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
This commit is contained in:
qiulaidongfeng 2025-07-26 16:46:22 +08:00 • committed by Alan Donovan
parent a2c45f0eb1
commit 4ee0df8c46
52 changed files with 1 additions and 1033 deletions
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68
src/cmd/compile/internal/ssa/rewrite.go
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@ -625,51 +625,16 @@ func truncate64Fto32F(f float64) float32 {
return math.Float32frombits(r)
}
// extend32Fto64F converts a float32 value to a float64 value preserving the bit
// pattern of the mantissa.
func extend32Fto64F(f float32) float64 {
if !math.IsNaN(float64(f)) {
return float64(f)
}
// NaN bit patterns aren't necessarily preserved across conversion
// instructions so we need to do the conversion manually.
b := uint64(math.Float32bits(f))
// | sign | exponent | mantissa |
r := ((b << 32) & (1 << 63)) | (0x7ff << 52) | ((b & 0x7fffff) << (52 - 23))
return math.Float64frombits(r)
}
// DivisionNeedsFixUp reports whether the division needs fix-up code.
func DivisionNeedsFixUp(v *Value) bool {
return v.AuxInt == 0
}
// auxFrom64F encodes a float64 value so it can be stored in an AuxInt.
func auxFrom64F(f float64) int64 {
if f != f {
panic("can't encode a NaN in AuxInt field")
}
return int64(math.Float64bits(f))
}
// auxFrom32F encodes a float32 value so it can be stored in an AuxInt.
func auxFrom32F(f float32) int64 {
if f != f {
panic("can't encode a NaN in AuxInt field")
}
return int64(math.Float64bits(extend32Fto64F(f)))
}
// auxTo32F decodes a float32 from the AuxInt value provided.
func auxTo32F(i int64) float32 {
return truncate64Fto32F(math.Float64frombits(uint64(i)))
}
// auxTo64F decodes a float64 from the AuxInt value provided.
func auxTo64F(i int64) float64 {
return math.Float64frombits(uint64(i))
}
func auxIntToBool(i int64) bool {
if i == 0 {
return false
@ -703,12 +668,6 @@ func auxIntToValAndOff(i int64) ValAndOff {
func auxIntToArm64BitField(i int64) arm64BitField {
return arm64BitField(i)
}
func auxIntToInt128(x int64) int128 {
if x != 0 {
panic("nonzero int128 not allowed")
}
return 0
}
func auxIntToFlagConstant(x int64) flagConstant {
return flagConstant(x)
}
@ -750,12 +709,6 @@ func valAndOffToAuxInt(v ValAndOff) int64 {
func arm64BitFieldToAuxInt(v arm64BitField) int64 {
return int64(v)
}
func int128ToAuxInt(x int128) int64 {
if x != 0 {
panic("nonzero int128 not allowed")
}
return 0
}
func flagConstantToAuxInt(x flagConstant) int64 {
return int64(x)
}
@ -826,23 +779,6 @@ func uaddOvf(a, b int64) bool {
return uint64(a)+uint64(b) < uint64(a)
}
// loadLSymOffset simulates reading a word at an offset into a
// read-only symbol's runtime memory. If it would read a pointer to
// another symbol, that symbol is returned. Otherwise, it returns nil.
func loadLSymOffset(lsym *obj.LSym, offset int64) *obj.LSym {
if lsym.Type != objabi.SRODATA {
return nil
}
for _, r := range lsym.R {
if int64(r.Off) == offset && r.Type&^objabi.R_WEAK == objabi.R_ADDR && r.Add == 0 {
return r.Sym
}
}
return nil
}
func devirtLECall(v *Value, sym *obj.LSym) *Value {
v.Op = OpStaticLECall
auxcall := v.Aux.(*AuxCall)
@ -1564,10 +1500,6 @@ func GetPPC64Shiftmb(auxint int64) int64 {
return int64(int8(auxint >> 8))
}
func GetPPC64Shiftme(auxint int64) int64 {
return int64(int8(auxint))
}
// Test if this value can encoded as a mask for a rlwinm like
// operation. Masks can also extend from the msb and wrap to
// the lsb too. That is, the valid masks are 32 bit strings