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-rw-r--r--llvm/lib/Target/X86/X86CallingConv.td3
1 files changed, 3 insertions, 0 deletions
diff --git a/llvm/lib/Target/X86/X86CallingConv.td b/llvm/lib/Target/X86/X86CallingConv.td
index 26461986427..64c81391578 100644
--- a/llvm/lib/Target/X86/X86CallingConv.td
+++ b/llvm/lib/Target/X86/X86CallingConv.td
@@ -592,6 +592,9 @@ def CC_X86_Win64_C : CallingConv<[
// The 'nest' parameter, if any, is passed in R10.
CCIfNest<CCAssignToReg<[R10]>>,
+ // A SwiftError is passed in R12.
+ CCIfSwiftError<CCIfType<[i64], CCAssignToReg<[R12]>>>,
+
// 128 bit vectors are passed by pointer
CCIfType<[v16i8, v8i16, v4i32, v2i64, v4f32, v2f64], CCPassIndirect<i64>>,
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