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Revert "cmd/compile: teach prove about bitwise OR operation"

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This reverts commit 3680b5e9c4.

Reason for revert: causes long compile times on certain functions. See issue #57959

Change-Id: Ie9e881ca8abbc79a46de2bfeaed0b9d6c416ed42
Reviewed-on: https://go-review.googlesource.com/c/go/+/463295
Run-TryBot: Keith Randall <khr@golang.org>
Reviewed-by: David Chase <drchase@google.com>
Reviewed-by: Cherry Mui <cherryyz@google.com>
TryBot-Result: Gopher Robot <gobot@golang.org>
Reviewed-by: Cuong Manh Le <cuong.manhle.vn@gmail.com>
This commit is contained in:
Keith Randall 2023-01-24 16:11:06 +00:00
parent 8c37d486c8
commit a6ddb15f8f
2 changed files with 0 additions and 8 deletions
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3
src/cmd/compile/internal/ssa/prove.go
View File

@ -856,9 +856,6 @@ func prove(f *Func) {
case OpAnd64, OpAnd32, OpAnd16, OpAnd8:
ft.update(b, v, v.Args[1], unsigned, lt|eq)
ft.update(b, v, v.Args[0], unsigned, lt|eq)
case OpOr64, OpOr32, OpOr16, OpOr8:
ft.update(b, v, v.Args[1], unsigned, gt|eq)
ft.update(b, v, v.Args[0], unsigned, gt|eq)
case OpDiv64u, OpDiv32u, OpDiv16u, OpDiv8u,
OpRsh8Ux64, OpRsh8Ux32, OpRsh8Ux16, OpRsh8Ux8,
OpRsh16Ux64, OpRsh16Ux32, OpRsh16Ux16, OpRsh16Ux8,

5
test/prove.go
View File

@ -1092,11 +1092,6 @@ func issue51622(b []byte) int {
return 0
}
func issue45928(x int) {
combinedFrac := (x) / (x | (1 << 31)) // ERROR "Proved Neq64$"
useInt(combinedFrac)
}
//go:noinline
func useInt(a int) {
}