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| ; Fourth example from Doc/Coroutines.rst (coroutine promise)
; RUN: opt < %s -O2 -enable-coroutines -S | FileCheck %s
define i8* @f(i32 %n) {
entry:
%promise = alloca i32
%pv = bitcast i32* %promise to i8*
%id = call token @llvm.coro.id(i32 0, i8* %pv, i8* null, i8* null)
%need.dyn.alloc = call i1 @llvm.coro.alloc(token %id)
br i1 %need.dyn.alloc, label %dyn.alloc, label %coro.begin
dyn.alloc:
%size = call i32 @llvm.coro.size.i32()
%alloc = call i8* @malloc(i32 %size)
br label %coro.begin
coro.begin:
%phi = phi i8* [ null, %entry ], [ %alloc, %dyn.alloc ]
%hdl = call noalias i8* @llvm.coro.begin(token %id, i8* %phi)
br label %loop
loop:
%n.val = phi i32 [ %n, %coro.begin ], [ %inc, %loop ]
%inc = add nsw i32 %n.val, 1
store i32 %n.val, i32* %promise
%0 = call i8 @llvm.coro.suspend(token none, i1 false)
switch i8 %0, label %suspend [i8 0, label %loop
i8 1, label %cleanup]
cleanup:
%mem = call i8* @llvm.coro.free(token %id, i8* %hdl)
call void @free(i8* %mem)
br label %suspend
suspend:
call i1 @llvm.coro.end(i8* %hdl, i1 false)
ret i8* %hdl
}
; CHECK-LABEL: @main
define i32 @main() {
entry:
%hdl = call i8* @f(i32 4)
%promise.addr.raw = call i8* @llvm.coro.promise(i8* %hdl, i32 4, i1 false)
%promise.addr = bitcast i8* %promise.addr.raw to i32*
%val0 = load i32, i32* %promise.addr
call void @print(i32 %val0)
call void @llvm.coro.resume(i8* %hdl)
%val1 = load i32, i32* %promise.addr
call void @print(i32 %val1)
call void @llvm.coro.resume(i8* %hdl)
%val2 = load i32, i32* %promise.addr
call void @print(i32 %val2)
call void @llvm.coro.destroy(i8* %hdl)
ret i32 0
; CHECK: call void @print(i32 4)
; CHECK-NEXT: call void @print(i32 5)
; CHECK-NEXT: call void @print(i32 6)
; CHECK: ret i32 0
}
declare i8* @llvm.coro.promise(i8*, i32, i1)
declare i8* @malloc(i32)
declare void @free(i8*)
declare void @print(i32)
declare token @llvm.coro.id(i32, i8*, i8*, i8*)
declare i1 @llvm.coro.alloc(token)
declare i32 @llvm.coro.size.i32()
declare i8* @llvm.coro.begin(token, i8*)
declare i8 @llvm.coro.suspend(token, i1)
declare i8* @llvm.coro.free(token, i8*)
declare i1 @llvm.coro.end(i8*, i1)
declare void @llvm.coro.resume(i8*)
declare void @llvm.coro.destroy(i8*)
|