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/X86/X86FastISel.cpp b/lib/Target/X86/X86FastISel.cpp
index f5db6d2..452b215 100644
--- a/lib/Target/X86/X86FastISel.cpp
+++ b/lib/Target/X86/X86FastISel.cpp
@@ -658,6 +658,10 @@
/// X86SelectStore - Select and emit code to implement store instructions.
bool X86FastISel::X86SelectStore(const Instruction *I) {
+ // Atomic stores need special handling.
+ if (cast<StoreInst>(I)->isAtomic())
+ return false;
+
MVT VT;
if (!isTypeLegal(I->getOperand(0)->getType(), VT, /*AllowI1=*/true))
return false;
@@ -780,6 +784,10 @@
/// X86SelectLoad - Select and emit code to implement load instructions.
///
bool X86FastISel::X86SelectLoad(const Instruction *I) {
+ // Atomic loads need special handling.
+ if (cast<LoadInst>(I)->isAtomic())
+ return false;
+
MVT VT;
if (!isTypeLegal(I->getType(), VT, /*AllowI1=*/true))
return false;