mirror of
https://github.com/RPCS3/llvm-mirror.git
synced 2024-11-24 03:33:20 +01:00
a6e4de7050
We've rejected these kinds of functions since r28405 in 2006 because it's impossible to lower the return of a callee cleanup varargs function. However there are lots of legal ways to leave such a function without returning, such as aborting. Today we can leave a function with a musttail call to another function with the correct prototype, and everything works out. I'm removing the verifier check declaring that a normal return from such a function is UB. Reviewed By: nlewycky Differential Revision: http://reviews.llvm.org/D5059 llvm-svn: 216779
40 lines
1.1 KiB
LLVM
40 lines
1.1 KiB
LLVM
; RUN: llvm-as %s -o /dev/null
|
|
|
|
; Should assemble without error.
|
|
|
|
declare void @similar_param_ptrty_callee(i8*)
|
|
define void @similar_param_ptrty(i32*) {
|
|
musttail call void @similar_param_ptrty_callee(i8* null)
|
|
ret void
|
|
}
|
|
|
|
declare i8* @similar_ret_ptrty_callee()
|
|
define i32* @similar_ret_ptrty() {
|
|
%v = musttail call i8* @similar_ret_ptrty_callee()
|
|
%w = bitcast i8* %v to i32*
|
|
ret i32* %w
|
|
}
|
|
|
|
declare x86_thiscallcc void @varargs_thiscall(i8*, ...)
|
|
define x86_thiscallcc void @varargs_thiscall_thunk(i8* %this, ...) {
|
|
musttail call x86_thiscallcc void (i8*, ...)* @varargs_thiscall(i8* %this, ...)
|
|
ret void
|
|
}
|
|
|
|
declare x86_fastcallcc void @varargs_fastcall(i8*, ...)
|
|
define x86_fastcallcc void @varargs_fastcall_thunk(i8* %this, ...) {
|
|
musttail call x86_fastcallcc void (i8*, ...)* @varargs_fastcall(i8* %this, ...)
|
|
ret void
|
|
}
|
|
|
|
define x86_thiscallcc void @varargs_thiscall_unreachable(i8* %this, ...) {
|
|
unreachable
|
|
}
|
|
|
|
define x86_thiscallcc void @varargs_thiscall_ret_unreachable(i8* %this, ...) {
|
|
musttail call x86_thiscallcc void (i8*, ...)* @varargs_thiscall(i8* %this, ...)
|
|
ret void
|
|
bb1:
|
|
ret void
|
|
}
|