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; Tests that we'll generate the store to the final suspend index if we see the unwind coro end.
; RUN: opt < %s -passes='cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s
define ptr @unwind_coro_end() presplitcoroutine personality i32 3 {
entry:
%id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)
%hdl = call ptr @llvm.coro.begin(token %id, ptr null)
call void @print(i32 0)
br label %init
init:
%initial_suspend = call i8 @llvm.coro.suspend(token none, i1 false)
switch i8 %initial_suspend, label %init_suspend [i8 0, label %init_resume
i8 1, label %init_suspend]
init_suspend:
ret ptr %hdl
init_resume:
br label %susp
susp:
%0 = call i8 @llvm.coro.suspend(token none, i1 true)
switch i8 %0, label %suspend [i8 0, label %resume
i8 1, label %suspend]
resume:
invoke void @print(i32 1) to label %suspend unwind label %lpad
suspend:
call i1 @llvm.coro.end(ptr %hdl, i1 false)
call void @print(i32 0)
ret ptr %hdl
lpad:
%lpval = landingpad { ptr, i32 }
cleanup
call void @print(i32 2)
%need.resume = call i1 @llvm.coro.end(ptr null, i1 true)
br i1 %need.resume, label %eh.resume, label %cleanup.cont
cleanup.cont:
call void @print(i32 3)
br label %eh.resume
eh.resume:
resume { ptr, i32 } %lpval
}
; Tests that we need to store the final index if we see unwind coro end.
; CHECK: define{{.*}}@unwind_coro_end.resume
; CHECK: store i1 true, ptr %index.addr
; Tests the use of final index in the destroy function.
; CHECK: define{{.*}}@unwind_coro_end.destroy
; CHECK: %[[INDEX:.+]] = load i1, ptr %index.addr
; CHECK-NEXT: switch i1 %[[INDEX]],
define ptr @nounwind_coro_end(i1 %val) presplitcoroutine personality i32 3 {
entry:
%id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)
%hdl = call ptr @llvm.coro.begin(token %id, ptr null)
call void @print(i32 0)
br label %init
init:
%initial_suspend = call i8 @llvm.coro.suspend(token none, i1 false)
switch i8 %initial_suspend, label %init_suspend [i8 0, label %init_resume
i8 1, label %init_suspend]
init_suspend:
ret ptr %hdl
init_resume:
br label %susp
susp:
%0 = call i8 @llvm.coro.suspend(token none, i1 true)
switch i8 %0, label %suspend [i8 0, label %resume
i8 1, label %suspend]
resume:
call void @print(i32 1)
br label %suspend
suspend:
call i1 @llvm.coro.end(ptr %hdl, i1 false)
call void @print(i32 0)
ret ptr %hdl
}
; Tests that we can omit to store the final suspend index if we don't
; see unwind coro end.
; CHECK: define{{.*}}@nounwind_coro_end.resume
; CHECK-NOT: store i1 true, ptr %index.addr
; CHECK: }
; Tests that we judge the final suspend case by the nullness of resume function.
; CHECK: define{{.*}}@nounwind_coro_end.destroy
; CHECK: %[[RESUME_FN:.+]] = load ptr, ptr %hdl, align 8
; CHECK: %{{.*}} = icmp eq ptr %[[RESUME_FN]], null
declare ptr @llvm.coro.free(token, ptr)
declare i32 @llvm.coro.size.i32()
declare i8 @llvm.coro.suspend(token, i1)
declare void @llvm.coro.resume(ptr)
declare void @llvm.coro.destroy(ptr)
declare token @llvm.coro.id(i32, ptr, ptr, ptr)
declare ptr @llvm.coro.alloc(token)
declare ptr @llvm.coro.begin(token, ptr)
declare i1 @llvm.coro.end(ptr, i1)
declare noalias ptr @malloc(i32)
declare void @print(i32)
declare void @free(ptr)
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