| ; Test no suspend coroutines |
| ; RUN: opt < %s -O2 -enable-coroutines -S | FileCheck %s |
| |
| ; Coroutine with no-suspends will turn into: |
| ; |
| ; CHECK-LABEL: define void @no_suspends( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: call void @print(i32 %n) |
| ; CHECK-NEXT: ret void |
| ; |
| define void @no_suspends(i32 %n) { |
| entry: |
| %id = call token @llvm.coro.id(i32 0, i8* null, 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 %body |
| body: |
| call void @print(i32 %n) |
| br label %cleanup |
| cleanup: |
| %mem = call i8* @llvm.coro.free(token %id, i8* %hdl) |
| %need.dyn.free = icmp ne i8* %mem, null |
| br i1 %need.dyn.free, label %dyn.free, label %suspend |
| dyn.free: |
| call void @free(i8* %mem) |
| br label %suspend |
| suspend: |
| call i1 @llvm.coro.end(i8* %hdl, i1 false) |
| ret void |
| } |
| |
| ; SimplifySuspendPoint will detect that coro.resume resumes itself and will |
| ; replace suspend with a jump to %resume label turning it into no-suspend |
| ; coroutine. |
| ; |
| ; CHECK-LABEL: define void @simplify_resume( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: call void @print(i32 0) |
| ; CHECK-NEXT: ret void |
| ; |
| define void @simplify_resume() { |
| entry: |
| %id = call token @llvm.coro.id(i32 0, i8* null, 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 %body |
| body: |
| %save = call token @llvm.coro.save(i8* %hdl) |
| call void @llvm.coro.resume(i8* %hdl) |
| %0 = call i8 @llvm.coro.suspend(token %save, i1 false) |
| switch i8 %0, label %suspend [i8 0, label %resume |
| i8 1, label %pre.cleanup] |
| resume: |
| call void @print(i32 0) |
| br label %cleanup |
| |
| pre.cleanup: |
| call void @print(i32 1) |
| br 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 void |
| } |
| |
| ; SimplifySuspendPoint will detect that coroutine destroys itself and will |
| ; replace suspend with a jump to %cleanup label turning it into no-suspend |
| ; coroutine. |
| ; |
| ; CHECK-LABEL: define void @simplify_destroy( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: call void @print(i32 1) |
| ; CHECK-NEXT: ret void |
| ; |
| define void @simplify_destroy() { |
| entry: |
| %id = call token @llvm.coro.id(i32 0, i8* null, 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 %body |
| body: |
| %save = call token @llvm.coro.save(i8* %hdl) |
| call void @llvm.coro.destroy(i8* %hdl) |
| %0 = call i8 @llvm.coro.suspend(token %save, i1 false) |
| switch i8 %0, label %suspend [i8 0, label %resume |
| i8 1, label %pre.cleanup] |
| resume: |
| call void @print(i32 0) |
| br label %cleanup |
| |
| pre.cleanup: |
| call void @print(i32 1) |
| br 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 void |
| } |
| |
| ; SimplifySuspendPoint won't be able to simplify if it detects that there are |
| ; other calls between coro.save and coro.suspend. They potentially can call |
| ; resume or destroy, so we should not simplify this suspend point. |
| ; |
| ; CHECK-LABEL: define void @cannot_simplify( |
| ; CHECK-NEXT: entry: |
| ; CHECK-NEXT: call i8* @malloc |
| |
| define void @cannot_simplify() { |
| entry: |
| %id = call token @llvm.coro.id(i32 0, i8* null, 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 %body |
| body: |
| %save = call token @llvm.coro.save(i8* %hdl) |
| call void @foo() |
| call void @llvm.coro.destroy(i8* %hdl) |
| %0 = call i8 @llvm.coro.suspend(token %save, i1 false) |
| switch i8 %0, label %suspend [i8 0, label %resume |
| i8 1, label %pre.cleanup] |
| resume: |
| call void @print(i32 0) |
| br label %cleanup |
| |
| pre.cleanup: |
| call void @print(i32 1) |
| br 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 void |
| } |
| |
| declare i8* @malloc(i32) |
| declare void @free(i8*) |
| declare void @print(i32) |
| declare void @foo() |
| |
| 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 token @llvm.coro.save(i8* %hdl) |
| 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*) |