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; Tests that coro-split will convert a call before coro.suspend to a musttail call
; while the user of the coro.suspend is a icmpinst.
; RUN: opt < %s -passes='cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s
define void @fakeresume1(ptr) {
entry:
ret void;
}
define void @f() #0 {
entry:
%id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)
%alloc = call ptr @malloc(i64 16) #3
%vFrame = call noalias nonnull ptr @llvm.coro.begin(token %id, ptr %alloc)
%save = call token @llvm.coro.save(ptr null)
%init_suspend = call i8 @llvm.coro.suspend(token %save, i1 false)
switch i8 %init_suspend, label %coro.end [
i8 0, label %await.ready
i8 1, label %coro.end
]
await.ready:
%save2 = call token @llvm.coro.save(ptr null)
call fastcc void @fakeresume1(ptr align 8 null)
%suspend = call i8 @llvm.coro.suspend(token %save2, i1 true)
%switch = icmp ult i8 %suspend, 2
br i1 %switch, label %cleanup, label %coro.end
cleanup:
%free.handle = call ptr @llvm.coro.free(token %id, ptr %vFrame)
%.not = icmp eq ptr %free.handle, null
br i1 %.not, label %coro.end, label %coro.free
coro.free:
call void @delete(ptr nonnull %free.handle) #2
br label %coro.end
coro.end:
call i1 @llvm.coro.end(ptr null, i1 false)
ret void
}
; CHECK-LABEL: @f.resume(
; CHECK: musttail call fastcc void @fakeresume1(
; CHECK-NEXT: ret void
declare token @llvm.coro.id(i32, ptr readnone, ptr nocapture readonly, ptr) #1
declare i1 @llvm.coro.alloc(token) #2
declare i64 @llvm.coro.size.i64() #3
declare ptr @llvm.coro.begin(token, ptr writeonly) #2
declare token @llvm.coro.save(ptr) #2
declare ptr @llvm.coro.frame() #3
declare i8 @llvm.coro.suspend(token, i1) #2
declare ptr @llvm.coro.free(token, ptr nocapture readonly) #1
declare i1 @llvm.coro.end(ptr, i1) #2
declare ptr @llvm.coro.subfn.addr(ptr nocapture readonly, i8) #1
declare ptr @malloc(i64)
declare void @delete(ptr nonnull) #2
attributes #0 = { presplitcoroutine }
attributes #1 = { argmemonly nounwind readonly }
attributes #2 = { nounwind }
attributes #3 = { nounwind readnone }
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