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; Tests that CoroSplit can succesfully determine allocas should live on the frame
; if their aliases are used across suspension points through PHINode.
; RUN: opt < %s -passes='cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s
define ptr @f(i1 %n) presplitcoroutine {
entry:
%x = alloca i64
%y = alloca i64
%id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)
%size = call i32 @llvm.coro.size.i32()
%alloc = call ptr @malloc(i32 %size)
%hdl = call ptr @llvm.coro.begin(token %id, ptr %alloc)
br i1 %n, label %flag_true, label %flag_false
flag_true:
br label %merge
flag_false:
br label %merge
merge:
%alias_phi = phi ptr [ %x, %flag_true ], [ %y, %flag_false ]
%sp1 = call i8 @llvm.coro.suspend(token none, i1 false)
switch i8 %sp1, label %suspend [i8 0, label %resume
i8 1, label %cleanup]
resume:
call void @print(ptr %alias_phi)
br label %cleanup
cleanup:
%mem = call ptr @llvm.coro.free(token %id, ptr %hdl)
call void @free(ptr %mem)
br label %suspend
suspend:
call i1 @llvm.coro.end(ptr %hdl, i1 0, token none)
ret ptr %hdl
}
; both %x and %y, as well as %alias_phi would all go to the frame.
; CHECK: %f.Frame = type { ptr, ptr, i64, i64, ptr, i1 }
; CHECK-LABEL: @f(
; CHECK: %x.reload.addr = getelementptr inbounds %f.Frame, ptr %hdl, i32 0, i32 2
; CHECK: %y.reload.addr = getelementptr inbounds %f.Frame, ptr %hdl, i32 0, i32 3
; CHECK: %alias_phi = phi ptr [ %y.reload.addr, %merge.from.flag_false ], [ %x.reload.addr, %entry ]
; CHECK: %alias_phi.spill.addr = getelementptr inbounds %f.Frame, ptr %hdl, i32 0, i32 4
; CHECK: store ptr %alias_phi, ptr %alias_phi.spill.addr, align 8
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 i1 @llvm.coro.alloc(token)
declare ptr @llvm.coro.begin(token, ptr)
declare i1 @llvm.coro.end(ptr, i1, token)
declare void @print(ptr)
declare noalias ptr @malloc(i32)
declare void @free(ptr)
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