Silence some uninit variable warnings.

llvm-svn: 20284
diff --git a/llvm/lib/Target/X86/X86ISelPattern.cpp b/llvm/lib/Target/X86/X86ISelPattern.cpp
index caba4f6..e673bb5 100644
--- a/llvm/lib/Target/X86/X86ISelPattern.cpp
+++ b/llvm/lib/Target/X86/X86ISelPattern.cpp
@@ -2933,6 +2933,7 @@
     RP.push_back(std::make_pair(getRegPressure(N.getOperand(2)), 2));
     std::sort(RP.begin(), RP.end());
 
+    Tmp1 = 0;   // Silence a warning.
     for (unsigned i = 0; i != 3; ++i)
       switch (RP[2-i].second) {
       default: assert(0 && "Unknown operand number!");
@@ -2989,6 +2990,7 @@
     RP.push_back(std::make_pair(getRegPressure(N.getOperand(2)), 2));
     std::sort(RP.begin(), RP.end());
 
+    Tmp1 = 0; // Silence a warning.
     for (unsigned i = 0; i != 3; ++i)
       switch (RP[2-i].second) {
       default: assert(0 && "Unknown operand number!");