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| 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 | 18b9b8df86baa9427351e045c356e7ec246eb7a6 (patch) | |
| tree | 29f3e98c8b70cc011e2614b949dd2487d663de1a /llvm/lib | |
| parent | 015d73996df24689f40d8908d9de6a87b31e0da2 (diff) | |
| download | bcm5719-llvm-18b9b8df86baa9427351e045c356e7ec246eb7a6.tar.gz bcm5719-llvm-18b9b8df86baa9427351e045c356e7ec246eb7a6.zip | |
More optimal solution for loading constants.
llvm-svn: 22870
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/PowerPC/PPC32ISelPattern.cpp | 20 |
1 files changed, 11 insertions, 9 deletions
diff --git a/llvm/lib/Target/PowerPC/PPC32ISelPattern.cpp b/llvm/lib/Target/PowerPC/PPC32ISelPattern.cpp index b217e6015c4..5052c5deca9 100644 --- a/llvm/lib/Target/PowerPC/PPC32ISelPattern.cpp +++ b/llvm/lib/Target/PowerPC/PPC32ISelPattern.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; } |
