mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 11:42:57 +01:00
3b791814db
Summary: This intrinsic, together with deoptimization operand bundles, allow frontends to express transfer of control and frame-local state from one (typically more specialized, hence faster) version of a function into another (typically more generic, hence slower) version. In languages with a fully integrated managed runtime this intrinsic can be used to implement "uncommon trap" like functionality. In unmanaged languages like C and C++, this intrinsic can be used to represent the slow paths of specialized functions. Note: this change does not address how `@llvm.experimental_deoptimize` is lowered. That will be done in a later change. Reviewers: chandlerc, rnk, atrick, reames Subscribers: llvm-commits, kmod, mjacob, maksfb, mcrosier, JosephTremoulet Differential Revision: http://reviews.llvm.org/D17732 llvm-svn: 263281
43 lines
1.1 KiB
LLVM
43 lines
1.1 KiB
LLVM
; RUN: not opt -verify < %s 2>&1 | FileCheck %s
|
|
|
|
declare i8 @llvm.experimental.deoptimize.i8(...)
|
|
declare void @llvm.experimental.deoptimize.isVoid(...)
|
|
|
|
declare void @unknown()
|
|
|
|
define void @f_notail() {
|
|
entry:
|
|
call void(...) @llvm.experimental.deoptimize.isVoid(i32 0) [ "deopt"() ]
|
|
; CHECK: calls to experimental_deoptimize must be followed by a return
|
|
call void @unknown()
|
|
ret void
|
|
}
|
|
|
|
define void @f_nodeopt() {
|
|
entry:
|
|
call void(...) @llvm.experimental.deoptimize.isVoid()
|
|
; CHECK: experimental_deoptimize must have exactly one "deopt" operand bundle
|
|
ret void
|
|
}
|
|
|
|
define void @f_invoke() personality i8 3 {
|
|
entry:
|
|
invoke void(...) @llvm.experimental.deoptimize.isVoid(i32 0, float 0.0) to label %ok unwind label %not_ok
|
|
; CHECK: experimental_deoptimize cannot be invoked
|
|
|
|
ok:
|
|
ret void
|
|
|
|
not_ok:
|
|
%0 = landingpad { i8*, i32 }
|
|
filter [0 x i8*] zeroinitializer
|
|
ret void
|
|
}
|
|
|
|
define i8 @f_incorrect_return() {
|
|
entry:
|
|
%val = call i8(...) @llvm.experimental.deoptimize.i8() [ "deopt"() ]
|
|
; CHECK: calls to experimental_deoptimize must be followed by a return of the value computed by experimental_deoptimize
|
|
ret i8 0
|
|
}
|