Don't fast-isel for atomic load/store; some cases require extra handling missing from fast-isel.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@139044 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMFastISel.cpp b/lib/Target/ARM/ARMFastISel.cpp
index 390cd92..79c1391 100644
--- a/lib/Target/ARM/ARMFastISel.cpp
+++ b/lib/Target/ARM/ARMFastISel.cpp
@@ -946,6 +946,10 @@
}
bool ARMFastISel::SelectLoad(const Instruction *I) {
+ // Atomic loads need special handling.
+ if (cast<LoadInst>(I)->isAtomic())
+ return false;
+
// Verify we have a legal type before going any further.
MVT VT;
if (!isLoadTypeLegal(I->getType(), VT))
@@ -1008,6 +1012,10 @@
Value *Op0 = I->getOperand(0);
unsigned SrcReg = 0;
+ // Atomic stores need special handling.
+ if (cast<StoreInst>(I)->isAtomic())
+ return false;
+
// Verify we have a legal type before going any further.
MVT VT;
if (!isLoadTypeLegal(I->getOperand(0)->getType(), VT))