382 lines
12 KiB
LLVM
382 lines
12 KiB
LLVM
; Test no suspend coroutines
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; RUN: opt < %s -coro-split -S | FileCheck %s
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; RUN: opt < %s -passes=coro-split -S | FileCheck %s
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; Coroutine with no-suspends will turn into:
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;
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; CHECK-LABEL: define void @no_suspends(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: alloca
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: call void @print(i32 %n)
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; CHECK-NEXT: ret void
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;
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define void @no_suspends(i32 %n) "coroutine.presplit"="1" {
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entry:
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%id = call token @llvm.coro.id(i32 0, i8* null, i8* null, i8* null)
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%need.dyn.alloc = call i1 @llvm.coro.alloc(token %id)
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br i1 %need.dyn.alloc, label %dyn.alloc, label %coro.begin
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dyn.alloc:
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%size = call i32 @llvm.coro.size.i32()
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%alloc = call i8* @malloc(i32 %size)
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br label %coro.begin
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coro.begin:
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%phi = phi i8* [ null, %entry ], [ %alloc, %dyn.alloc ]
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%hdl = call noalias i8* @llvm.coro.begin(token %id, i8* %phi)
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br label %body
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body:
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call void @print(i32 %n)
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br label %cleanup
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cleanup:
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%mem = call i8* @llvm.coro.free(token %id, i8* %hdl)
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%need.dyn.free = icmp ne i8* %mem, null
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br i1 %need.dyn.free, label %dyn.free, label %suspend
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dyn.free:
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call void @free(i8* %mem)
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br label %suspend
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suspend:
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call i1 @llvm.coro.end(i8* %hdl, i1 false)
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ret void
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}
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; SimplifySuspendPoint will detect that coro.resume resumes itself and will
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; replace suspend with a jump to %resume label turning it into no-suspend
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; coroutine.
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;
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; CHECK-LABEL: define void @simplify_resume(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: alloca
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: call void @llvm.memcpy
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; CHECK-NEXT: call void @print(i32 0)
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; CHECK-NEXT: ret void
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;
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define void @simplify_resume(i8* %src, i8* %dst) "coroutine.presplit"="1" {
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entry:
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%id = call token @llvm.coro.id(i32 0, i8* null, i8* null, i8* null)
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%need.dyn.alloc = call i1 @llvm.coro.alloc(token %id)
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br i1 %need.dyn.alloc, label %dyn.alloc, label %coro.begin
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dyn.alloc:
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%size = call i32 @llvm.coro.size.i32()
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%alloc = call i8* @malloc(i32 %size)
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br label %coro.begin
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coro.begin:
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%phi = phi i8* [ null, %entry ], [ %alloc, %dyn.alloc ]
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%hdl = call noalias i8* @llvm.coro.begin(token %id, i8* %phi)
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br label %body
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body:
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%save = call token @llvm.coro.save(i8* %hdl)
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; memcpy intrinsics should not prevent simplification.
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* %dst, i8* %src, i64 1, i1 false)
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%subfn = call i8* @llvm.coro.subfn.addr(i8* %hdl, i8 0)
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%bres = bitcast i8* %subfn to void (i8*)*
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call fastcc void %bres(i8* %hdl)
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%0 = call i8 @llvm.coro.suspend(token %save, i1 false)
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switch i8 %0, label %suspend [i8 0, label %resume
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i8 1, label %pre.cleanup]
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resume:
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call void @print(i32 0)
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br label %cleanup
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pre.cleanup:
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call void @print(i32 1)
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br label %cleanup
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cleanup:
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%mem = call i8* @llvm.coro.free(token %id, i8* %hdl)
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call void @free(i8* %mem)
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br label %suspend
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suspend:
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call i1 @llvm.coro.end(i8* %hdl, i1 false)
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ret void
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}
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; SimplifySuspendPoint will detect that coroutine destroys itself and will
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; replace suspend with a jump to %cleanup label turning it into no-suspend
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; coroutine.
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;
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; CHECK-LABEL: define void @simplify_destroy(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: alloca
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: call void @print(i32 1)
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; CHECK-NEXT: ret void
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;
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define void @simplify_destroy() "coroutine.presplit"="1" personality i32 0 {
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entry:
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%id = call token @llvm.coro.id(i32 0, i8* null, i8* null, i8* null)
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%need.dyn.alloc = call i1 @llvm.coro.alloc(token %id)
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br i1 %need.dyn.alloc, label %dyn.alloc, label %coro.begin
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dyn.alloc:
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%size = call i32 @llvm.coro.size.i32()
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%alloc = call i8* @malloc(i32 %size)
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br label %coro.begin
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coro.begin:
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%phi = phi i8* [ null, %entry ], [ %alloc, %dyn.alloc ]
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%hdl = call noalias i8* @llvm.coro.begin(token %id, i8* %phi)
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br label %body
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body:
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%save = call token @llvm.coro.save(i8* %hdl)
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%subfn = call i8* @llvm.coro.subfn.addr(i8* %hdl, i8 1)
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%bcast = bitcast i8* %subfn to void (i8*)*
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invoke fastcc void %bcast(i8* %hdl) to label %real_susp unwind label %lpad
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real_susp:
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%0 = call i8 @llvm.coro.suspend(token %save, i1 false)
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switch i8 %0, label %suspend [i8 0, label %resume
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i8 1, label %pre.cleanup]
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resume:
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call void @print(i32 0)
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br label %cleanup
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pre.cleanup:
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call void @print(i32 1)
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br label %cleanup
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cleanup:
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%mem = call i8* @llvm.coro.free(token %id, i8* %hdl)
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call void @free(i8* %mem)
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br label %suspend
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suspend:
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call i1 @llvm.coro.end(i8* %hdl, i1 false)
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ret void
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lpad:
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%lpval = landingpad { i8*, i32 }
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cleanup
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call void @print(i32 2)
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resume { i8*, i32 } %lpval
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}
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; SimplifySuspendPoint will detect that coro.resume resumes itself and will
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; replace suspend with a jump to %resume label turning it into no-suspend
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; coroutine.
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;
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; CHECK-LABEL: define void @simplify_resume_with_inlined_if(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: alloca
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; CHECK-NEXT: bitcast
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; CHECK-NEXT: br i1
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; CHECK: call void @print(i32 0)
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; CHECK-NEXT: ret void
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;
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define void @simplify_resume_with_inlined_if(i8* %src, i8* %dst, i1 %cond) "coroutine.presplit"="1" {
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entry:
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%id = call token @llvm.coro.id(i32 0, i8* null, i8* null, i8* null)
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%need.dyn.alloc = call i1 @llvm.coro.alloc(token %id)
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br i1 %need.dyn.alloc, label %dyn.alloc, label %coro.begin
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dyn.alloc:
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%size = call i32 @llvm.coro.size.i32()
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%alloc = call i8* @malloc(i32 %size)
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br label %coro.begin
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coro.begin:
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%phi = phi i8* [ null, %entry ], [ %alloc, %dyn.alloc ]
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%hdl = call noalias i8* @llvm.coro.begin(token %id, i8* %phi)
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br label %body
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body:
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%save = call token @llvm.coro.save(i8* %hdl)
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br i1 %cond, label %if.then, label %if.else
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if.then:
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* %dst, i8* %src, i64 1, i1 false)
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br label %if.end
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if.else:
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* %src, i8* %dst, i64 1, i1 false)
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br label %if.end
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if.end:
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%subfn = call i8* @llvm.coro.subfn.addr(i8* %hdl, i8 0)
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%bres = bitcast i8* %subfn to void (i8*)*
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call fastcc void %bres(i8* %hdl)
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%0 = call i8 @llvm.coro.suspend(token %save, i1 false)
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switch i8 %0, label %suspend [i8 0, label %resume
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i8 1, label %pre.cleanup]
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resume:
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call void @print(i32 0)
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br label %cleanup
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pre.cleanup:
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call void @print(i32 1)
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br label %cleanup
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cleanup:
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%mem = call i8* @llvm.coro.free(token %id, i8* %hdl)
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call void @free(i8* %mem)
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br label %suspend
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suspend:
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call i1 @llvm.coro.end(i8* %hdl, i1 false)
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ret void
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}
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; SimplifySuspendPoint won't be able to simplify if it detects that there are
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; other calls between coro.save and coro.suspend. They potentially can call
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; resume or destroy, so we should not simplify this suspend point.
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;
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; CHECK-LABEL: define void @cannot_simplify_other_calls(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: llvm.coro.id
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define void @cannot_simplify_other_calls() "coroutine.presplit"="1" {
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entry:
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%id = call token @llvm.coro.id(i32 0, i8* null, i8* null, i8* null)
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%need.dyn.alloc = call i1 @llvm.coro.alloc(token %id)
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br i1 %need.dyn.alloc, label %dyn.alloc, label %coro.begin
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dyn.alloc:
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%size = call i32 @llvm.coro.size.i32()
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%alloc = call i8* @malloc(i32 %size)
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br label %coro.begin
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coro.begin:
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%phi = phi i8* [ null, %entry ], [ %alloc, %dyn.alloc ]
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%hdl = call noalias i8* @llvm.coro.begin(token %id, i8* %phi)
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br label %body
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body:
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%save = call token @llvm.coro.save(i8* %hdl)
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br label %body1
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body1:
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call void @foo()
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br label %body2
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body2:
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%subfn = call i8* @llvm.coro.subfn.addr(i8* %hdl, i8 1)
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%bcast = bitcast i8* %subfn to void (i8*)*
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call fastcc void %bcast(i8* %hdl)
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%0 = call i8 @llvm.coro.suspend(token %save, i1 false)
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switch i8 %0, label %suspend [i8 0, label %resume
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i8 1, label %pre.cleanup]
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resume:
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call void @print(i32 0)
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br label %cleanup
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pre.cleanup:
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call void @print(i32 1)
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br label %cleanup
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cleanup:
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%mem = call i8* @llvm.coro.free(token %id, i8* %hdl)
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call void @free(i8* %mem)
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br label %suspend
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suspend:
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call i1 @llvm.coro.end(i8* %hdl, i1 false)
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ret void
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}
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; SimplifySuspendPoint won't be able to simplify if it detects that there are
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; other calls between coro.save and coro.suspend. They potentially can call
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; resume or destroy, so we should not simplify this suspend point.
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;
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; CHECK-LABEL: define void @cannot_simplify_calls_in_terminator(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: llvm.coro.id
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define void @cannot_simplify_calls_in_terminator() "coroutine.presplit"="1" personality i32 0 {
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entry:
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%id = call token @llvm.coro.id(i32 0, i8* null, i8* null, i8* null)
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%need.dyn.alloc = call i1 @llvm.coro.alloc(token %id)
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br i1 %need.dyn.alloc, label %dyn.alloc, label %coro.begin
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dyn.alloc:
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%size = call i32 @llvm.coro.size.i32()
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%alloc = call i8* @malloc(i32 %size)
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br label %coro.begin
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coro.begin:
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%phi = phi i8* [ null, %entry ], [ %alloc, %dyn.alloc ]
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%hdl = call noalias i8* @llvm.coro.begin(token %id, i8* %phi)
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br label %body
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body:
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%save = call token @llvm.coro.save(i8* %hdl)
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invoke void @foo() to label %resume_cont unwind label %lpad
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resume_cont:
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%subfn = call i8* @llvm.coro.subfn.addr(i8* %hdl, i8 1)
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%bcast = bitcast i8* %subfn to void (i8*)*
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call fastcc void %bcast(i8* %hdl)
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%0 = call i8 @llvm.coro.suspend(token %save, i1 false)
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switch i8 %0, label %suspend [i8 0, label %resume
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i8 1, label %pre.cleanup]
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resume:
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call void @print(i32 0)
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br label %cleanup
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pre.cleanup:
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call void @print(i32 1)
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br label %cleanup
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cleanup:
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%mem = call i8* @llvm.coro.free(token %id, i8* %hdl)
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call void @free(i8* %mem)
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br label %suspend
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suspend:
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call i1 @llvm.coro.end(i8* %hdl, i1 false)
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ret void
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lpad:
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%lpval = landingpad { i8*, i32 }
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cleanup
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call void @print(i32 2)
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resume { i8*, i32 } %lpval
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}
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; SimplifySuspendPoint won't be able to simplify if it detects that resume or
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; destroy does not immediately preceed coro.suspend.
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;
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; CHECK-LABEL: define void @cannot_simplify_not_last_instr(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: llvm.coro.id
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define void @cannot_simplify_not_last_instr(i8* %dst, i8* %src) "coroutine.presplit"="1" {
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entry:
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%id = call token @llvm.coro.id(i32 0, i8* null, i8* null, i8* null)
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%need.dyn.alloc = call i1 @llvm.coro.alloc(token %id)
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br i1 %need.dyn.alloc, label %dyn.alloc, label %coro.begin
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dyn.alloc:
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%size = call i32 @llvm.coro.size.i32()
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%alloc = call i8* @malloc(i32 %size)
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br label %coro.begin
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coro.begin:
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%phi = phi i8* [ null, %entry ], [ %alloc, %dyn.alloc ]
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%hdl = call noalias i8* @llvm.coro.begin(token %id, i8* %phi)
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br label %body
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body:
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%save = call token @llvm.coro.save(i8* %hdl)
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%subfn = call i8* @llvm.coro.subfn.addr(i8* %hdl, i8 1)
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%bcast = bitcast i8* %subfn to void (i8*)*
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call fastcc void %bcast(i8* %hdl)
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; memcpy separates destory from suspend, therefore cannot simplify.
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call void @llvm.memcpy.p0i8.p0i8.i64(i8* %dst, i8* %src, i64 1, i1 false)
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%0 = call i8 @llvm.coro.suspend(token %save, i1 false)
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switch i8 %0, label %suspend [i8 0, label %resume
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i8 1, label %pre.cleanup]
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resume:
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call void @print(i32 0)
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br label %cleanup
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pre.cleanup:
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call void @print(i32 1)
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br label %cleanup
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cleanup:
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%mem = call i8* @llvm.coro.free(token %id, i8* %hdl)
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call void @free(i8* %mem)
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br label %suspend
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suspend:
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call i1 @llvm.coro.end(i8* %hdl, i1 false)
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ret void
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}
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declare i8* @malloc(i32)
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declare void @free(i8*)
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declare void @print(i32)
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declare void @foo()
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declare token @llvm.coro.id(i32, i8*, i8*, i8*)
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declare i1 @llvm.coro.alloc(token)
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declare i32 @llvm.coro.size.i32()
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declare i8* @llvm.coro.begin(token, i8*)
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declare token @llvm.coro.save(i8* %hdl)
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declare i8 @llvm.coro.suspend(token, i1)
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declare i8* @llvm.coro.free(token, i8*)
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declare i1 @llvm.coro.end(i8*, i1)
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declare i8* @llvm.coro.subfn.addr(i8*, i8)
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declare void @llvm.memcpy.p0i8.p0i8.i64(i8* nocapture writeonly, i8* nocapture readonly, i64, i1)
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