[llvm] 2df2b27 - [cora async] Cleanup undefined llvm.coro.async.resume
Arnold Schwaighofer via llvm-commits
llvm-commits at lists.llvm.org
Thu Sep 30 13:27:15 PDT 2021
Author: Arnold Schwaighofer
Date: 2021-09-30T13:26:53-07:00
New Revision: 2df2b27d94f92680e810e6763ed032fd2dfcfe11
URL: https://github.com/llvm/llvm-project/commit/2df2b27d94f92680e810e6763ed032fd2dfcfe11
DIFF: https://github.com/llvm/llvm-project/commit/2df2b27d94f92680e810e6763ed032fd2dfcfe11.diff
LOG: [cora async] Cleanup undefined llvm.coro.async.resume
In situations where the coroutine function is not split we can just
replace the async.resume by null.
rdar://82591919
Differential Revision: https://reviews.llvm.org/D110191
Added:
Modified:
llvm/lib/Transforms/Coroutines/CoroCleanup.cpp
llvm/lib/Transforms/Coroutines/Coroutines.cpp
llvm/test/Transforms/Coroutines/coro-async.ll
Removed:
################################################################################
diff --git a/llvm/lib/Transforms/Coroutines/CoroCleanup.cpp b/llvm/lib/Transforms/Coroutines/CoroCleanup.cpp
index cffacdc5dedb4..9d6e233744871 100644
--- a/llvm/lib/Transforms/Coroutines/CoroCleanup.cpp
+++ b/llvm/lib/Transforms/Coroutines/CoroCleanup.cpp
@@ -70,6 +70,10 @@ bool Lowerer::lowerRemainingCoroIntrinsics(Function &F) {
case Intrinsic::coro_alloc:
II->replaceAllUsesWith(ConstantInt::getTrue(Context));
break;
+ case Intrinsic::coro_async_resume:
+ II->replaceAllUsesWith(
+ ConstantPointerNull::get(cast<PointerType>(I.getType())));
+ break;
case Intrinsic::coro_id:
case Intrinsic::coro_id_retcon:
case Intrinsic::coro_id_retcon_once:
@@ -114,7 +118,8 @@ static bool declaresCoroCleanupIntrinsics(const Module &M) {
return coro::declaresIntrinsics(
M, {"llvm.coro.alloc", "llvm.coro.begin", "llvm.coro.subfn.addr",
"llvm.coro.free", "llvm.coro.id", "llvm.coro.id.retcon",
- "llvm.coro.id.retcon.once", "llvm.coro.async.size.replace"});
+ "llvm.coro.id.retcon.once", "llvm.coro.async.size.replace",
+ "llvm.coro.async.resume"});
}
PreservedAnalyses CoroCleanupPass::run(Function &F,
diff --git a/llvm/lib/Transforms/Coroutines/Coroutines.cpp b/llvm/lib/Transforms/Coroutines/Coroutines.cpp
index 66e47ef03bf93..201e8281b5f36 100644
--- a/llvm/lib/Transforms/Coroutines/Coroutines.cpp
+++ b/llvm/lib/Transforms/Coroutines/Coroutines.cpp
@@ -126,6 +126,7 @@ static bool isCoroutineIntrinsicName(StringRef Name) {
"llvm.coro.alloc",
"llvm.coro.async.context.alloc",
"llvm.coro.async.context.dealloc",
+ "llvm.coro.async.resume",
"llvm.coro.async.size.replace",
"llvm.coro.async.store_resume",
"llvm.coro.begin",
diff --git a/llvm/test/Transforms/Coroutines/coro-async.ll b/llvm/test/Transforms/Coroutines/coro-async.ll
index 58aaa0efb12e8..151573fe22925 100644
--- a/llvm/test/Transforms/Coroutines/coro-async.ll
+++ b/llvm/test/Transforms/Coroutines/coro-async.ll
@@ -540,6 +540,34 @@ entry:
; CHECK: store i64* null, i64** [[ALLOCA]]
; CHECK: call void @do_with_swifterror(i64** {{.*}}swifterror{{.*}} [[ALLOCA]])
+ at undefined_coro_async_resume_fp = constant <{ i32, i32 }>
+ <{ i32 trunc (
+ i64 sub (
+ i64 ptrtoint (void (i8*)* @undefined_coro_async_resume to i64),
+ i64 ptrtoint (i32* getelementptr inbounds (<{ i32, i32 }>, <{ i32, i32 }>* @undefined_coro_async_resume_fp, i32 0, i32 1) to i64)
+ )
+ to i32),
+ i32 24
+}>
+
+declare void @crash()
+declare void @use(i8*)
+
+define swiftcc void @undefined_coro_async_resume(i8 *%async.ctx) {
+entry:
+ %id = call token @llvm.coro.id.async(i32 24, i32 16, i32 0, i8* bitcast (<{i32, i32}>* @undefined_coro_async_resume_fp to i8*))
+ %hdl = call i8* @llvm.coro.begin(token %id, i8* null)
+ %undefined_resume_pointer = call i8* @llvm.coro.async.resume()
+ call void @use(i8* %undefined_resume_pointer)
+ call void @crash()
+ %unused = call i1 (i8*, i1, ...) @llvm.coro.end.async(i8* %hdl, i1 false)
+ unreachable
+}
+; CHECK-LABEL: define swiftcc void @undefined_coro_async_resume
+; CHECK-NOT: @llvm.coro.async.resume
+; CHECK: call void @use(i8* null)
+; CHECK: unreachable
+
declare { i8*, i8*, i8*, i8* } @llvm.coro.suspend.async.sl_p0i8p0i8p0i8p0i8s(i32, i8*, i8*, ...)
declare i8* @llvm.coro.prepare.async(i8*)
declare token @llvm.coro.id.async(i32, i32, i32, i8*)
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