Reapply "IR: Add fp operations to atomicrmw"
This reapplies commits r351778 and r351782 with
RISCV test fixes.
llvm-svn: 351850
diff --git a/llvm/lib/CodeGen/AtomicExpandPass.cpp b/llvm/lib/CodeGen/AtomicExpandPass.cpp
index bef9682..2d91594 100644
--- a/llvm/lib/CodeGen/AtomicExpandPass.cpp
+++ b/llvm/lib/CodeGen/AtomicExpandPass.cpp
@@ -549,6 +549,10 @@
case AtomicRMWInst::UMin:
NewVal = Builder.CreateICmpULE(Loaded, Inc);
return Builder.CreateSelect(NewVal, Loaded, Inc, "new");
+ case AtomicRMWInst::FAdd:
+ return Builder.CreateFAdd(Loaded, Inc, "new");
+ case AtomicRMWInst::FSub:
+ return Builder.CreateFSub(Loaded, Inc, "new");
default:
llvm_unreachable("Unknown atomic op");
}
@@ -1547,6 +1551,8 @@
case AtomicRMWInst::Min:
case AtomicRMWInst::UMax:
case AtomicRMWInst::UMin:
+ case AtomicRMWInst::FAdd:
+ case AtomicRMWInst::FSub:
// No atomic libcalls are available for max/min/umax/umin.
return {};
}