Handle loading of 0x????0000 constants with a single instruction.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22858 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/PowerPC/PPCISelPattern.cpp b/lib/Target/PowerPC/PPCISelPattern.cpp
index fb2a93c..2f09a63 100644
--- a/lib/Target/PowerPC/PPCISelPattern.cpp
+++ b/lib/Target/PowerPC/PPCISelPattern.cpp
@@ -1738,12 +1738,16 @@
case MVT::i32:
{
int v = (int)cast<ConstantSDNode>(N)->getSignExtended();
- if (v < 32768 && v >= -32768) {
- BuildMI(BB, PPC::LI, 1, Result).addSImm(v);
- } else {
+ unsigned Hi = Hi16(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(v & 0xFFFF);
+ BuildMI(BB, PPC::LIS, 1, Tmp1).addSImm(Hi);
+ BuildMI(BB, PPC::ORI, 2, Result).addReg(Tmp1).addImm(Lo);
+ } else if (Lo) {
+ BuildMI(BB, PPC::LI, 1, Result).addSImm(Lo);
+ } else {
+ BuildMI(BB, PPC::LIS, 1, Result).addSImm(Hi);
}
}
}