| ; Tests that sinked lifetime markers wouldn't provent optimization |
| ; to convert a resuming call to a musttail call. |
| ; The difference between this and coro-split-musttail5.ll is that there is |
| ; an extra bitcast instruction in the path, which makes it harder to |
| ; optimize. |
| ; RUN: opt < %s -passes='cgscc(coro-split),simplifycfg,early-cse' -S | FileCheck %s |
| |
| declare void @fakeresume1(ptr align 8) |
| |
| define void @g() #0 { |
| entry: |
| %id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null) |
| %alloc = call ptr @malloc(i64 16) #3 |
| %alloc.var = alloca i64 |
| call void @llvm.lifetime.start.p0(i64 1, ptr %alloc.var) |
| %vFrame = call noalias nonnull ptr @llvm.coro.begin(token %id, ptr %alloc) |
| |
| %save = call token @llvm.coro.save(ptr null) |
| %suspend = call i8 @llvm.coro.suspend(token %save, i1 false) |
| |
| switch i8 %suspend, label %exit [ |
| i8 0, label %await.suspend |
| i8 1, label %exit |
| ] |
| await.suspend: |
| %save2 = call token @llvm.coro.save(ptr null) |
| call fastcc void @fakeresume1(ptr align 8 null) |
| %suspend2 = call i8 @llvm.coro.suspend(token %save2, i1 false) |
| switch i8 %suspend2, label %exit [ |
| i8 0, label %await.ready |
| i8 1, label %exit |
| ] |
| await.ready: |
| call void @consume(ptr %alloc.var) |
| call void @llvm.lifetime.end.p0(i64 1, ptr %alloc.var) |
| br label %exit |
| exit: |
| call i1 @llvm.coro.end(ptr null, i1 false, token none) |
| ret void |
| } |
| |
| ; Verify that in the resume part resume call is marked with musttail. |
| ; CHECK-LABEL: @g.resume( |
| ; CHECK: musttail call fastcc void @fakeresume1(ptr align 8 null) |
| ; CHECK-NEXT: ret void |
| |
| ; It has a cleanup bb. |
| define void @f() #0 { |
| entry: |
| %id = call token @llvm.coro.id(i32 0, ptr null, ptr null, ptr null) |
| %alloc = call ptr @malloc(i64 16) #3 |
| %alloc.var = alloca i64 |
| call void @llvm.lifetime.start.p0(i64 1, ptr %alloc.var) |
| %vFrame = call noalias nonnull ptr @llvm.coro.begin(token %id, ptr %alloc) |
| |
| %save = call token @llvm.coro.save(ptr null) |
| %suspend = call i8 @llvm.coro.suspend(token %save, i1 false) |
| |
| switch i8 %suspend, label %exit [ |
| i8 0, label %await.suspend |
| i8 1, label %exit |
| ] |
| await.suspend: |
| %save2 = call token @llvm.coro.save(ptr null) |
| call fastcc void @fakeresume1(ptr align 8 null) |
| %suspend2 = call i8 @llvm.coro.suspend(token %save2, i1 false) |
| switch i8 %suspend2, label %exit [ |
| i8 0, label %await.ready |
| i8 1, label %cleanup |
| ] |
| await.ready: |
| call void @consume(ptr %alloc.var) |
| call void @llvm.lifetime.end.p0(i64 1, ptr %alloc.var) |
| br label %exit |
| |
| cleanup: |
| %free.handle = call ptr @llvm.coro.free(token %id, ptr %vFrame) |
| %.not = icmp eq ptr %free.handle, null |
| br i1 %.not, label %exit, label %coro.free |
| |
| coro.free: |
| call void @delete(ptr nonnull %free.handle) #2 |
| br label %exit |
| |
| exit: |
| call i1 @llvm.coro.end(ptr null, i1 false, token none) |
| ret void |
| } |
| |
| ; FIXME: The fakeresume1 here should be marked as musttail. |
| ; Verify that in the resume part resume call is marked with musttail. |
| ; CHECK-LABEL: @f.resume( |
| ; CHECK: musttail call fastcc void @fakeresume1(ptr align 8 null) |
| ; CHECK-NEXT: ret void |
| |
| declare token @llvm.coro.id(i32, ptr readnone, ptr nocapture readonly, ptr) #1 |
| declare i1 @llvm.coro.alloc(token) #2 |
| declare i64 @llvm.coro.size.i64() #3 |
| declare ptr @llvm.coro.begin(token, ptr writeonly) #2 |
| declare token @llvm.coro.save(ptr) #2 |
| declare ptr @llvm.coro.frame() #3 |
| declare i8 @llvm.coro.suspend(token, i1) #2 |
| declare ptr @llvm.coro.free(token, ptr nocapture readonly) #1 |
| declare i1 @llvm.coro.end(ptr, i1, token) #2 |
| declare ptr @llvm.coro.subfn.addr(ptr nocapture readonly, i8) #1 |
| declare ptr @malloc(i64) |
| declare void @delete(ptr nonnull) #2 |
| declare void @consume(ptr) |
| declare void @llvm.lifetime.start.p0(i64, ptr nocapture) |
| declare void @llvm.lifetime.end.p0(i64, ptr nocapture) |
| |
| attributes #0 = { presplitcoroutine } |
| attributes #1 = { argmemonly nounwind readonly } |
| attributes #2 = { nounwind } |
| attributes #3 = { nounwind readnone } |