You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
28 lines
1.0 KiB
28 lines
1.0 KiB
; RUN: llc < %s -mtriple=s390x-linux-gnu | FileCheck %s
|
|
|
|
; Check that the stackmap shadow optimization is only outputting a 2-byte
|
|
; nop here. 8-bytes are requested, but 6 are covered by the code for the call to
|
|
; bar. However, the frame teardown and the return do not count towards the
|
|
; stackmap shadow as the call return counts as a branch target so must flush
|
|
; the shadow.
|
|
; Note that in order for a thread to not return in to the patched space
|
|
; the call must be at the end of the shadow, so the required nop must be
|
|
; before the call, not after.
|
|
define void @shadow_optimization_test() {
|
|
entry:
|
|
; CHECK-LABEL: shadow_optimization_test:
|
|
; CHECK: brasl %r14, bar@PLT
|
|
; CHECK-NEXT: .Ltmp
|
|
; CHECK-NEXT: bcr 0, %r0
|
|
; CHECK-NEXT: brasl %r14, bar@PLT
|
|
; CHECK-NEXT: brasl %r14, bar@PLT
|
|
call void @bar()
|
|
tail call void (i64, i32, ...) @llvm.experimental.stackmap(i64 0, i32 8)
|
|
call void @bar()
|
|
call void @bar()
|
|
ret void
|
|
}
|
|
declare void @bar()
|
|
|
|
declare void @llvm.experimental.stackmap(i64, i32, ...)
|