From 7627df38556754533cf7b718bf02f4050e6c67e8 Mon Sep 17 00:00:00 2001 From: Chris Lattner Date: Wed, 28 Nov 2007 21:26:17 +0000 Subject: Work around a GCC bug, producing this code: unsigned char *llvm_cbe_X; ... llvm_cbe_X = 0; *((void**)&llvm_cbe_X) = __builtin_stack_save(); instead of: llvm_cbe_X = __builtin_stack_save(); See PR1809 for details. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@44415 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/Target/CBackend/CBackend.cpp | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp index 852e28df87..2d18468215 100644 --- a/lib/Target/CBackend/CBackend.cpp +++ b/lib/Target/CBackend/CBackend.cpp @@ -2573,6 +2573,12 @@ void CWriter::visitCallInst(CallInst &I) { writeOperand(I.getOperand(3)); Out << ")"; return; + case Intrinsic::stacksave: + // Emit this as: Val = 0; *((void**)&Val) = __builtin_stack_save() + // to work around GCC bugs (see PR1809). + Out << "0; *((void**)&" << GetValueName(&I) + << ") = __builtin_stack_save()"; + return; case Intrinsic::dbg_stoppoint: { // If we use writeOperand directly we get a "u" suffix which is rejected // by gcc. -- cgit v1.2.3