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go/test/codegen/retpoline.go
Dmitri Shuralyov b2fd76ab8d test: migrate remaining files to go:build syntax
Most of the test cases in the test directory use the new go:build syntax
already. Convert the rest. In general, try to place the build constraint
line below the test directive comment in more places.

For #41184.
For #60268.

Change-Id: I11c41a0642a8a26dc2eda1406da908645bbc005b
Cq-Include-Trybots: luci.golang.try:gotip-linux-386-longtest,gotip-linux-amd64-longtest,gotip-windows-amd64-longtest
Reviewed-on: https://go-review.googlesource.com/c/go/+/536236
Reviewed-by: Ian Lance Taylor <iant@google.com>
Reviewed-by: Dmitri Shuralyov <dmitshur@google.com>
Auto-Submit: Dmitri Shuralyov <dmitshur@golang.org>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>
2023-10-19 23:33:25 +00:00

44 lines
580 B
Go

// asmcheck -gcflags=-spectre=ret
//go:build amd64
package codegen
func CallFunc(f func()) {
// amd64:`CALL\truntime.retpoline`
f()
}
func CallInterface(x interface{ M() }) {
// amd64:`CALL\truntime.retpoline`
x.M()
}
// Check to make sure that jump tables are disabled
// when retpoline is on. See issue 57097.
func noJumpTables(x int) int {
switch x {
case 0:
return 0
case 1:
return 1
case 2:
return 2
case 3:
return 3
case 4:
return 4
case 5:
return 5
case 6:
return 6
case 7:
return 7
case 8:
return 8
case 9:
return 9
}
return 10
}