void ARMException::beginFunction(const MachineFunction *MF) {
if (Asm->MAI->getExceptionHandlingType() == ExceptionHandling::ARM)
getTargetStreamer().emitFnStart();
- if (Asm->MF->getFunction()->needsUnwindTableEntry())
- Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_begin",
- Asm->getFunctionNumber()));
+ Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_begin",
+ Asm->getFunctionNumber()));
// See if we need call frame info.
AsmPrinter::CFIMoveType MoveType = Asm->needsCFIMoves();
assert(MoveType != AsmPrinter::CFI_M_EH &&
if (shouldEmitCFI)
Asm->OutStreamer.EmitCFIEndProc();
+ // Map all labels and get rid of any dead landing pads.
+ MMI->TidyLandingPads();
+
ARMTargetStreamer &ATS = getTargetStreamer();
- if (!Asm->MF->getFunction()->needsUnwindTableEntry())
+ if (!Asm->MF->getFunction()->needsUnwindTableEntry() &&
+ MMI->getLandingPads().empty())
ATS.emitCantUnwind();
else {
Asm->OutStreamer.EmitLabel(Asm->GetTempSymbol("eh_func_end",
Asm->getFunctionNumber()));
-
- // Map all labels and get rid of any dead landing pads.
- MMI->TidyLandingPads();
-
if (!MMI->getLandingPads().empty()) {
// Emit references to personality.
if (const Function * Personality =
--- /dev/null
+; Test for handlerdata when the function has landingpad and nounwind.
+
+; This test case checks whether the handlerdata is generated for the function
+; with landingpad instruction, even if the function has "nounwind" atttribute.
+;
+; For example, although the following function never throws any exception,
+; however, it is still required to generate LSDA, otherwise, we can't catch
+; the exception properly.
+;
+; void test1() noexcept {
+; try {
+; throw_exception();
+; } catch (...) {
+; }
+; }
+
+; RUN: llc -mtriple arm-unknown-linux-gnueabi -filetype=asm -o - %s \
+; RUN: | FileCheck %s
+
+declare void @throw_exception()
+
+declare i32 @__gxx_personality_v0(...)
+
+declare i8* @__cxa_begin_catch(i8*)
+
+declare void @__cxa_end_catch()
+
+define void @test1() nounwind {
+entry:
+ invoke void @throw_exception() to label %try.cont unwind label %lpad
+
+lpad:
+ %0 = landingpad { i8*, i32 } personality i8* bitcast (i32 (...)* @__gxx_personality_v0 to i8*)
+ catch i8* null
+ %1 = extractvalue { i8*, i32 } %0, 0
+ %2 = tail call i8* @__cxa_begin_catch(i8* %1)
+ tail call void @__cxa_end_catch()
+ br label %try.cont
+
+try.cont:
+ ret void
+}
+
+; CHECK: .globl test1
+; CHECK: .align 2
+; CHECK: .type test1,%function
+; CHECK-LABEL: test1:
+; CHECK: .fnstart
+
+; CHECK-NOT: .cantunwind
+
+; CHECK: .personality __gxx_personality_v0
+; CHECK: .handlerdata
+; CHECK: .align 2
+; CHECK-LABEL: GCC_except_table0:
+; CHECK-LABEL: .Lexception0:
+; CHECK: .byte 255 @ @LPStart Encoding = omit
+; CHECK: .byte 0 @ @TType Encoding = absptr
+; CHECK: .asciz
+; CHECK: .byte 3 @ Call site Encoding = udata4
+; CHECK: .fnend