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
diff --git a/lib/Target/CBackend/CBackend.cpp b/lib/Target/CBackend/CBackend.cpp
index 852e28d..2d18468 100644
--- a/lib/Target/CBackend/CBackend.cpp
+++ b/lib/Target/CBackend/CBackend.cpp
@@ -2573,6 +2573,12 @@
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.