Fix undefined behavior in the Mips backend.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@152390 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/Mips/MipsAnalyzeImmediate.h b/lib/Target/Mips/MipsAnalyzeImmediate.h
index 24e6e5f..a094dda 100644
--- a/lib/Target/Mips/MipsAnalyzeImmediate.h
+++ b/lib/Target/Mips/MipsAnalyzeImmediate.h
@@ -25,7 +25,7 @@
     /// Analyze - Get an instrucion sequence to load immediate Imm. The last
     /// instruction in the sequence must be an ADDiu if LastInstrIsADDiu is
     /// true;
-    const InstSeq &Analyze(int64_t Imm, unsigned Size, bool LastInstrIsADDiu);
+    const InstSeq &Analyze(uint64_t Imm, unsigned Size, bool LastInstrIsADDiu);
   private:
     typedef SmallVector<InstSeq, 5> InstSeqLs;
 
@@ -34,18 +34,18 @@
 
     /// GetInstSeqLsADDiu - Get instrucion sequences which end with an ADDiu to
     /// load immediate Imm
-    void GetInstSeqLsADDiu(int64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
+    void GetInstSeqLsADDiu(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
 
     /// GetInstSeqLsORi - Get instrucion sequences which end with an ORi to
     /// load immediate Imm
-    void GetInstSeqLsORi(int64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
+    void GetInstSeqLsORi(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
 
     /// GetInstSeqLsSLL - Get instrucion sequences which end with a SLL to
     /// load immediate Imm
-    void GetInstSeqLsSLL(int64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
+    void GetInstSeqLsSLL(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
 
     /// GetInstSeqLs - Get instrucion sequences to load immediate Imm.
-    void GetInstSeqLs(int64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
+    void GetInstSeqLs(uint64_t Imm, unsigned RemSize, InstSeqLs &SeqLs);
 
     /// ReplaceADDiuSLLWithLUi - Replace an ADDiu & SLL pair with a LUi.
     void ReplaceADDiuSLLWithLUi(InstSeq &Seq);