More optimal solution for loading constants.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22870 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCISelPattern.cpp b/lib/Target/PowerPC/PPCISelPattern.cpp
index b217e60..5052c5d 100644
--- a/lib/Target/PowerPC/PPCISelPattern.cpp
+++ b/lib/Target/PowerPC/PPCISelPattern.cpp
@@ -1719,16 +1719,18 @@
assert(N.getValueType() == MVT::i32 &&
"Only i32 constants are legal on this target!");
unsigned v = (unsigned)cast<ConstantSDNode>(N)->getValue();
- unsigned Hi = HA16(v);
- unsigned Lo = Lo16(v);
- if (Hi && Lo) {
- Tmp1 = MakeIntReg();
- BuildMI(BB, PPC::LIS, 1, Tmp1).addSImm(v >> 16);
- BuildMI(BB, PPC::ORI, 2, Result).addReg(Tmp1).addImm(Lo);
- } else if (Hi) {
- BuildMI(BB, PPC::LIS, 1, Result).addSImm(v >> 16);
+ if (isInt16(v)) {
+ BuildMI(BB, PPC::LI, 1, Result).addSImm(Lo16(v));
} else {
- BuildMI(BB, PPC::LI, 1, Result).addSImm(Lo);
+ unsigned Hi = Hi16(v);
+ unsigned Lo = Lo16(v);
+ if (Lo) {
+ Tmp1 = MakeIntReg();
+ BuildMI(BB, PPC::LIS, 1, Tmp1).addSImm(Hi);
+ BuildMI(BB, PPC::ORI, 2, Result).addReg(Tmp1).addImm(Lo);
+ } else {
+ BuildMI(BB, PPC::LIS, 1, Result).addSImm(Hi);
+ }
}
return Result;
}