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[mips] Remove redundant code in RetCC_MipsN. NFC.
Summary: i32 is always promoted to i64 so it no longer makes sense to assign i32 to registers. Reviewers: vmedic Reviewed By: vmedic Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D5964 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@220561 91177308-0d34-0410-b5e6-96231b3b80d8
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@ -141,9 +141,6 @@ def RetCC_MipsN : CallingConv<[
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CCIfSubtargetNot<"isLittle()",
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CCIfType<[i8, i16, i32, i64], CCIfInReg<CCPromoteToUpperBitsInType<i64>>>>,
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// i32 are returned in registers V0, V1
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CCIfType<[i32], CCAssignToReg<[V0, V1]>>,
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// i64 are returned in registers V0_64, V1_64
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CCIfType<[i64], CCAssignToReg<[V0_64, V1_64]>>,
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