[PPC] Disable reg+reg to reg+imm transformation.

It creates invalid instructions. PR35688.

llvm-svn: 321010
diff --git a/llvm/lib/Target/PowerPC/PPCMIPeephole.cpp b/llvm/lib/Target/PowerPC/PPCMIPeephole.cpp
index 27ded63..a264072 100644
--- a/llvm/lib/Target/PowerPC/PPCMIPeephole.cpp
+++ b/llvm/lib/Target/PowerPC/PPCMIPeephole.cpp
@@ -55,7 +55,7 @@
                             "convert reg-reg instructions to reg-imm"));
 
 static cl::opt<bool>
-ConvertRegReg("ppc-convert-rr-to-ri", cl::Hidden, cl::init(true),
+ConvertRegReg("ppc-convert-rr-to-ri", cl::Hidden, cl::init(false),
               cl::desc("Convert eligible reg+reg instructions to reg+imm"));
 
 static cl::opt<bool>