1 files changed, 12 insertions, 3 deletions
diff --git a/llvm/lib/Target/X86/X86ISelLoweringCall.cpp b/llvm/lib/Target/X86/X86ISelLoweringCall.cpp
index 9ad3553..b4639ac 100644
--- a/llvm/lib/Target/X86/X86ISelLoweringCall.cpp
+++ b/llvm/lib/Target/X86/X86ISelLoweringCall.cpp
@@ -237,9 +237,18 @@ EVT X86TargetLowering::getSetCCResultType(const DataLayout &DL,
 bool X86TargetLowering::functionArgumentNeedsConsecutiveRegisters(
     Type *Ty, CallingConv::ID CallConv, bool isVarArg,
     const DataLayout &DL) const {
-  // i128 split into i64 needs to be allocated to two consecutive registers,
-  // or spilled to the stack as a whole.
-  return Ty->isIntegerTy(128);
+  // On x86-64 i128 is split into two i64s and needs to be allocated to two
+  // consecutive registers, or spilled to the stack as a whole. On x86-32 i128
+  // is split to four i32s and never actually passed in registers, but we use
+  // the consecutive register mark to match it in TableGen.
+  if (Ty->isIntegerTy(128))
+    return true;
+
+  // On x86-32, fp128 acts the same as i128.
+  if (Subtarget.is32Bit() && Ty->isFP128Ty())
+    return true;
+
+  return false;
 }
 
 /// Helper for getByValTypeAlignment to determine