Emit .cfi_sections before the first .cfi_startproc

GNU as rejects input where .cfi_sections is used after .cfi_startproc,
if the new section differs from the old. Adjust our output to always
emit .cfi_sections before the first .cfi_startproc to minimize necessary
code.

Differential Revision: https://reviews.llvm.org/D28011

llvm-svn: 290817

1 files changed, 6 insertions, 7 deletions

diff --git a/llvm/lib/CodeGen/AsmPrinter/ARMException.cpp b/llvm/lib/CodeGen/AsmPrinter/ARMException.cpp
index fff3f003478..0c79def8793 100644
--- a/llvm/lib/CodeGen/AsmPrinter/ARMException.cpp
+++ b/llvm/lib/CodeGen/AsmPrinter/ARMException.cpp
@@ -43,13 +43,6 @@ ARMTargetStreamer &ARMException::getTargetStreamer() {
   return static_cast<ARMTargetStreamer &>(TS);
 }
 
-/// endModule - Emit all exception information that should come after the
-/// content.
-void ARMException::endModule() {
-  if (shouldEmitCFI)
-    Asm->OutStreamer->EmitCFISections(false, true);
-}
-
 void ARMException::beginFunction(const MachineFunction *MF) {
   if (Asm->MAI->getExceptionHandlingType() == ExceptionHandling::ARM)
     getTargetStreamer().emitFnStart();
@@ -57,7 +50,13 @@ void ARMException::beginFunction(const MachineFunction *MF) {
   AsmPrinter::CFIMoveType MoveType = Asm->needsCFIMoves();
   assert(MoveType != AsmPrinter::CFI_M_EH &&
          "non-EH CFI not yet supported in prologue with EHABI lowering");
+
   if (MoveType == AsmPrinter::CFI_M_Debug) {
+    if (!hasEmittedCFISections) {
+      Asm->OutStreamer->EmitCFISections(false, true);
+      hasEmittedCFISections = true;
+    }
+
     shouldEmitCFI = true;
     Asm->OutStreamer->EmitCFIStartProc(false);
   }