diff options
Diffstat (limited to 'llvm')
| -rw-r--r-- | llvm/lib/Target/WebAssembly/WebAssemblyLowerEmscriptenEHSjLj.cpp | 7 | ||||
| -rw-r--r-- | llvm/test/CodeGen/WebAssembly/lower-em-sjlj.ll | 21 |
2 files changed, 28 insertions, 0 deletions
diff --git a/llvm/lib/Target/WebAssembly/WebAssemblyLowerEmscriptenEHSjLj.cpp b/llvm/lib/Target/WebAssembly/WebAssemblyLowerEmscriptenEHSjLj.cpp index 7ab8e361a8b..960d5134f6e 100644 --- a/llvm/lib/Target/WebAssembly/WebAssemblyLowerEmscriptenEHSjLj.cpp +++ b/llvm/lib/Target/WebAssembly/WebAssemblyLowerEmscriptenEHSjLj.cpp @@ -485,6 +485,13 @@ bool WebAssemblyLowerEmscriptenEHSjLj::canLongjmp(Module &M, if (CalleeF->isIntrinsic()) return false; + // Attempting to transform inline assembly will result in something like: + // call void @__invoke_void(void ()* asm ...) + // which is invalid because inline assembly blocks do not have addresses + // and can't be passed by pointer. The result is a crash with illegal IR. + if (isa<InlineAsm>(Callee)) + return false; + // The reason we include malloc/free here is to exclude the malloc/free // calls generated in setjmp prep / cleanup routines. Function *SetjmpF = M.getFunction("setjmp"); diff --git a/llvm/test/CodeGen/WebAssembly/lower-em-sjlj.ll b/llvm/test/CodeGen/WebAssembly/lower-em-sjlj.ll index bc851a4c06d..e33409265de 100644 --- a/llvm/test/CodeGen/WebAssembly/lower-em-sjlj.ll +++ b/llvm/test/CodeGen/WebAssembly/lower-em-sjlj.ll @@ -188,6 +188,27 @@ entry: ; CHECK-NEXT: call void @emscripten_longjmp_jmpbuf(%struct.__jmp_buf_tag* %[[ARRAYDECAY]], i32 5) #1 } +; Test inline asm handling +define hidden void @inline_asm() #0 { +; CHECK-LABEL: @inline_asm +entry: + %env = alloca [1 x %struct.__jmp_buf_tag], align 16 + %arraydecay = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %env, i32 0, i32 0 + %call = call i32 @setjmp(%struct.__jmp_buf_tag* %arraydecay) #4 + %cmp = icmp eq i32 %call, 0 + br i1 %cmp, label %if.then, label %if.else + +if.then: ; preds = %entry +; CHECK: call void asm sideeffect "", ""() + call void asm sideeffect "", ""() + %arraydecay1 = getelementptr inbounds [1 x %struct.__jmp_buf_tag], [1 x %struct.__jmp_buf_tag]* %env, i32 0, i32 0 + call void @longjmp(%struct.__jmp_buf_tag* %arraydecay1, i32 1) #5 + unreachable + +if.else: ; preds = %entry + ret void +} + declare void @foo() ; Function Attrs: returns_twice declare i32 @setjmp(%struct.__jmp_buf_tag*) #0 |
