blob: deee841db9c92682af604183f8070f54d1bffa9c [file] [log] [blame]
; Tests that coro-split will convert coro.resume followed by a suspend to a
; musttail call.
; RUN: opt < %s -coro-split -S | FileCheck %s
; RUN: opt < %s -passes=coro-split -S | FileCheck %s
define void @f() #0 {
entry:
%id = call token @llvm.coro.id(i32 0, i8* null, i8* null, i8* null)
%alloc = call i8* @malloc(i64 16) #3
%vFrame = call noalias nonnull i8* @llvm.coro.begin(token %id, i8* %alloc)
%save = call token @llvm.coro.save(i8* null)
%addr1 = call i8* @llvm.coro.subfn.addr(i8* null, i8 0)
%pv1 = bitcast i8* %addr1 to void (i8*)*
call fastcc void %pv1(i8* null)
%suspend = call i8 @llvm.coro.suspend(token %save, i1 false)
switch i8 %suspend, label %exit [
i8 0, label %await.ready
i8 1, label %exit
]
await.ready:
%save2 = call token @llvm.coro.save(i8* null)
%addr2 = call i8* @llvm.coro.subfn.addr(i8* null, i8 0)
%pv2 = bitcast i8* %addr2 to void (i8*)*
call fastcc void %pv2(i8* null)
%suspend2 = call i8 @llvm.coro.suspend(token %save2, i1 false)
switch i8 %suspend2, label %exit [
i8 0, label %exit
i8 1, label %exit
]
exit:
call i1 @llvm.coro.end(i8* null, i1 false)
ret void
}
; Verify that in the initial function resume is not marked with musttail.
; CHECK-LABEL: @f(
; CHECK: %[[addr1:.+]] = call i8* @llvm.coro.subfn.addr(i8* null, i8 0)
; CHECK-NEXT: %[[pv1:.+]] = bitcast i8* %[[addr1]] to void (i8*)*
; CHECK-NOT: musttail call fastcc void %[[pv1]](i8* null)
; Verify that in the resume part resume call is marked with musttail.
; CHECK-LABEL: @f.resume(
; CHECK: %[[addr2:.+]] = call i8* @llvm.coro.subfn.addr(i8* null, i8 0)
; CHECK-NEXT: %[[pv2:.+]] = bitcast i8* %[[addr2]] to void (i8*)*
; CHECK-NEXT: musttail call fastcc void %[[pv2]](i8* null)
; CHECK-NEXT: ret void
declare token @llvm.coro.id(i32, i8* readnone, i8* nocapture readonly, i8*) #1
declare i1 @llvm.coro.alloc(token) #2
declare i64 @llvm.coro.size.i64() #3
declare i8* @llvm.coro.begin(token, i8* writeonly) #2
declare token @llvm.coro.save(i8*) #2
declare i8* @llvm.coro.frame() #3
declare i8 @llvm.coro.suspend(token, i1) #2
declare i8* @llvm.coro.free(token, i8* nocapture readonly) #1
declare i1 @llvm.coro.end(i8*, i1) #2
declare i8* @llvm.coro.subfn.addr(i8* nocapture readonly, i8) #1
declare i8* @malloc(i64)
attributes #0 = { "coroutine.presplit"="1" }
attributes #1 = { argmemonly nounwind readonly }
attributes #2 = { nounwind }
attributes #3 = { nounwind readnone }