diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyLowerEmscriptenEHSjLj.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyLowerEmscriptenEHSjLj.cpp --- a/llvm/lib/Target/WebAssembly/WebAssemblyLowerEmscriptenEHSjLj.cpp +++ b/llvm/lib/Target/WebAssembly/WebAssemblyLowerEmscriptenEHSjLj.cpp @@ -1322,6 +1322,9 @@ BasicBlock *BB = CB->getParent(); if (BB->getParent() != &F) // in other function continue; + if (CB->getOperandBundle(LLVMContext::OB_funclet)) + report_fatal_error( + "setjmp within a catch clause is not supported in Wasm EH"); CallInst *CI = nullptr; // setjmp cannot throw. So if it is an invoke, lower it to a call diff --git a/llvm/test/CodeGen/WebAssembly/wasm-eh-sjlj-setjmp-within-catch.ll b/llvm/test/CodeGen/WebAssembly/wasm-eh-sjlj-setjmp-within-catch.ll new file mode 100644 --- /dev/null +++ b/llvm/test/CodeGen/WebAssembly/wasm-eh-sjlj-setjmp-within-catch.ll @@ -0,0 +1,70 @@ +; RUN: not --crash opt < %s -wasm-lower-em-ehsjlj -wasm-enable-eh -wasm-enable-sjlj -S 2>&1 | FileCheck %s + +target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128" +target triple = "wasm32-unknown-unknown" + +%struct.__jmp_buf_tag = type { [6 x i32], i32, [32 x i32] } +@_ZTIi = external constant i8* + +define void @setjmp_within_catch() personality i8* bitcast (i32 (...)* @__gxx_wasm_personality_v0 to i8*) { +entry: + %buf = alloca [1 x %struct.__jmp_buf_tag], align 16 + invoke void @foo() + to label %try.cont unwind label %catch.dispatch + +catch.dispatch: ; preds = %entry + %0 = catchswitch within none [label %catch.start] unwind to caller + +catch.start: ; preds = %catch.dispatch + %1 = catchpad within %0 [i8* bitcast (i8** @_ZTIi to i8*)] + %2 = call i8* @llvm.wasm.get.exception(token %1) + %3 = call i32 @llvm.wasm.get.ehselector(token %1) + %4 = call i32 @llvm.eh.typeid.for(i8* bitcast (i8** @_ZTIi to i8*)) #0 + %matches = icmp eq i32 %3, %4 + br i1 %matches, label %catch, label %rethrow + +catch: ; preds = %catch.start + %5 = call i8* @__cxa_begin_catch(i8* %2) #0 [ "funclet"(token %1) ] + %6 = bitcast i8* %5 to i32* + %7 = load i32, i32* %6, align 4 + %arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %buf, i32 0, i32 0 +; CHECK: LLVM ERROR: setjmp within a catch clause is not supported in Wasm EH + %call = invoke i32 @setjmp(%struct.__jmp_buf_tag* noundef %arraydecay) #2 [ "funclet"(token %1) ] + to label %invoke.cont1 unwind label %ehcleanup + +invoke.cont1: ; preds = %catch + call void @__cxa_end_catch() #0 [ "funclet"(token %1) ] + catchret from %1 to label %try.cont + +rethrow: ; preds = %catch.start + call void @llvm.wasm.rethrow() #1 [ "funclet"(token %1) ] + unreachable + +try.cont: ; preds = %entry, %invoke.cont1 + ret void + +ehcleanup: ; preds = %catch + %8 = cleanuppad within %1 [] + call void @__cxa_end_catch() #0 [ "funclet"(token %8) ] + cleanupret from %8 unwind to caller +} + + +declare void @foo() +declare i32 @__gxx_wasm_personality_v0(...) +; Function Attrs: nounwind +declare i8* @llvm.wasm.get.exception(token) #0 +; Function Attrs: nounwind +declare i32 @llvm.wasm.get.ehselector(token) #0 +; Function Attrs: nounwind +declare i32 @llvm.eh.typeid.for(i8*) #0 +; Function Attrs: noreturn +declare void @llvm.wasm.rethrow() #1 +declare i8* @__cxa_begin_catch(i8*) +; Function Attrs: returns_twice +declare i32 @setjmp(%struct.__jmp_buf_tag* noundef) #2 +declare void @__cxa_end_catch() + +attributes #0 = { nounwind } +attributes #1 = { noreturn } +attributes #2 = { returns_twice }