; Tests the PHI nodes in cleanuppads for catchswitch instructions are correctly
; split up.
; RUN: opt < %s -passes='cgscc(coro-split),simplifycfg<switch-range-to-icmp>,early-cse' -S | FileCheck %s
declare i32 @__CxxFrameHandler3(...)
define ptr @f2(i1 %val) presplitcoroutine personality ptr @__CxxFrameHandler3 {
entry:
%id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null)
%valueA = call i32 @f();
%valueB = call i32 @f();
%need.alloc = call i1 @llvm.coro.alloc(token %id)
br i1 %need.alloc, label %dyn.alloc, label %dowork.0
dyn.alloc:
%size = call i32 @llvm.coro.size.i32()
%alloc = call ptr @malloc(i32 %size)
br label %dowork.0
dowork.0:
%phi = phi ptr [ null, %entry ], [ %alloc, %dyn.alloc ]
%hdl = call ptr @llvm.coro.begin(token %id, ptr %phi)
invoke void @print(i32 0)
to label %checksuspend unwind label %catch.dispatch.1
checksuspend:
%0 = call i8 @llvm.coro.suspend(token none, i1 false)
switch i8 %0, label %suspend [i8 0, label %dowork.1
i8 1, label %cleanup]
dowork.1:
invoke void @print(i32 0)
to label %checksuspend unwind label %catch.dispatch.1
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
catch.dispatch.1:
%cs1 = catchswitch within none [label %handler1] unwind to caller
handler1:
%h1 = catchpad within %cs1 [ptr null, i32 64, ptr null]
invoke void @print(i32 2) [ "funclet"(token %h1) ]
to label %catchret1 unwind label %catch.dispatch.2
catchret1:
catchret from %h1 to label %cleanup
catch.dispatch.2:
%cs2 = catchswitch within %h1 [label %handler2] unwind label %cleanup2
handler2:
%h2 = catchpad within %cs2 [ptr null, i32 64, ptr null]
invoke void @print(i32 3) [ "funclet"(token %h2) ]
to label %cleanup unwind label %cleanup2
cleanup2:
%cleanupval2 = phi i32 [%valueA, %catch.dispatch.2], [%valueB, %handler2]
cleanuppad within %h1 []
call void @print(i32 %cleanupval2)
br label %cleanup
; Verifiers that a "dispatcher" cleanuppad is created.
; catchswitch and all associated catchpads are required to have the same unwind
; edge, but coro requires that PHI nodes are split up so that reload
; instructions can be generated, therefore we create a new "dispatcher"
; cleanuppad which forwards to individual blocks that contain the reload
; instructions per catchswitch/catchpad and then all branch back to the
; original cleanuppad block.
; CHECK: catch.dispatch.2:
; CHECK: %cs2 = catchswitch within %h1 [label %handler2] unwind label %cleanup2.corodispatch
; CHECK: handler2:
; CHECK: invoke void @print(i32 3)
; CHECK: to label %cleanup unwind label %cleanup2.corodispatch
; CHECK: cleanup2.corodispatch:
; CHECK: %1 = phi i8 [ 0, %handler2 ], [ 1, %catch.dispatch.2 ]
; CHECK: %2 = cleanuppad within %h1 []
; CHECK: %switch = icmp ult i8 %1, 1
; CHECK: br i1 %switch, label %cleanup2.from.handler2, label %cleanup2.from.catch.dispatch.2
; CHECK: cleanup2.from.handler2:
; CHECK: %valueB.reload = load i32, ptr %valueB.spill.addr, align 4
; CHECK: br label %cleanup2
; CHECK: cleanup2.from.catch.dispatch.2:
; CHECK: %valueA.reload = load i32, ptr %valueA.spill.addr, align 4
; CHECK: br label %cleanup2
; CHECK: cleanup2:
; CHECK: %cleanupval2 = phi i32 [ %valueA.reload, %cleanup2.from.catch.dispatch.2 ], [ %valueB.reload, %cleanup2.from.handler2 ]
; CHECK: call void @print(i32 %cleanupval2)
; CHECK: br label %cleanup
}
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 noalias ptr @malloc(i32)
declare void @print(i32)
declare void @free(ptr)
declare i32 @f()
Codebase Browser
llvm