diff options
| author | Jim Laskey <jlaskey@mac.com> | 2005-08-18 18:58:23 +0000 |
|---|---|---|
| committer | Jim Laskey <jlaskey@mac.com> | 2005-08-18 18:58:23 +0000 |
| commit | 5b5f0b7fd5ff6975920e65d4b1b019e456d6e850 (patch) | |
| tree | 5c34c9d10fa2ebe3c4cffc5ce05d069a934d736e /lib/Target/PowerPC/PPCISelPattern.cpp | |
| parent | d607c12e8e8533028a66c9f533007c6c32a64cef (diff) | |
More optimal solution for loading constants.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@22870 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/PowerPC/PPCISelPattern.cpp')
| -rw-r--r-- | lib/Target/PowerPC/PPCISelPattern.cpp | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/lib/Target/PowerPC/PPCISelPattern.cpp b/lib/Target/PowerPC/PPCISelPattern.cpp index b217e6015c..5052c5deca 100644 --- a/lib/Target/PowerPC/PPCISelPattern.cpp +++ b/lib/Target/PowerPC/PPCISelPattern.cpp @@ -1719,16 +1719,18 @@ unsigned ISel::SelectExpr(SDOperand N, bool Recording) { 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; } |