From: Misha Brukman <brukman+llvm@gmail.com>
Date: Wed, 28 Jul 2004 00:56:04 +0000 (+0000)
Subject: LI can only take signed values, so values > 32767 can only be loaded with ORI
X-Git-Url: http://plrg.eecs.uci.edu/git/?a=commitdiff_plain;h=8b29776d680f1b80b7471291b7d41df753d28511;p=oota-llvm.git

LI can only take signed values, so values > 32767 can only be loaded with ORI


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15299 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Target/PowerPC/PPC32ISelSimple.cpp b/lib/Target/PowerPC/PPC32ISelSimple.cpp
index 062df545fc9..790aab42c55 100644
--- a/lib/Target/PowerPC/PPC32ISelSimple.cpp
+++ b/lib/Target/PowerPC/PPC32ISelSimple.cpp
@@ -555,7 +555,13 @@ void ISel::copyConstantToRegister(MachineBasicBlock *MBB,
         BuildMI(*MBB, IP, PPC32::ORI, 2, R+1).addReg(Temp).addImm(Val & 0xFFFF);
       } else if (Val < (1ULL << 48)) {
         unsigned Temp = makeAnotherReg(Type::IntTy);
-        BuildMI(*MBB, IP, PPC32::LI, 1, R).addSImm((Val >> 32) & 0xFFFF);
+        int HiBits = (Val >> 32) & 0xFFFF;
+        if (HiBits > 32767) {
+          BuildMI(*MBB, IP, PPC32::LI, 1, PPC32::R0).addImm(0);
+          BuildMI(*MBB, IP, PPC32::ORI, 2, R).addReg(PPC32::R0).addSImm(HiBits);
+        } else {
+          BuildMI(*MBB, IP, PPC32::LI, 1, R).addSImm(HiBits);
+        }
         BuildMI(*MBB, IP, PPC32::LIS, 1, Temp).addSImm((Val >> 16) & 0xFFFF);
         BuildMI(*MBB, IP, PPC32::ORI, 2, R+1).addReg(Temp).addImm(Val & 0xFFFF);
       } else {
diff --git a/lib/Target/PowerPC/PowerPCISelSimple.cpp b/lib/Target/PowerPC/PowerPCISelSimple.cpp
index 062df545fc9..790aab42c55 100644
--- a/lib/Target/PowerPC/PowerPCISelSimple.cpp
+++ b/lib/Target/PowerPC/PowerPCISelSimple.cpp
@@ -555,7 +555,13 @@ void ISel::copyConstantToRegister(MachineBasicBlock *MBB,
         BuildMI(*MBB, IP, PPC32::ORI, 2, R+1).addReg(Temp).addImm(Val & 0xFFFF);
       } else if (Val < (1ULL << 48)) {
         unsigned Temp = makeAnotherReg(Type::IntTy);
-        BuildMI(*MBB, IP, PPC32::LI, 1, R).addSImm((Val >> 32) & 0xFFFF);
+        int HiBits = (Val >> 32) & 0xFFFF;
+        if (HiBits > 32767) {
+          BuildMI(*MBB, IP, PPC32::LI, 1, PPC32::R0).addImm(0);
+          BuildMI(*MBB, IP, PPC32::ORI, 2, R).addReg(PPC32::R0).addSImm(HiBits);
+        } else {
+          BuildMI(*MBB, IP, PPC32::LI, 1, R).addSImm(HiBits);
+        }
         BuildMI(*MBB, IP, PPC32::LIS, 1, Temp).addSImm((Val >> 16) & 0xFFFF);
         BuildMI(*MBB, IP, PPC32::ORI, 2, R+1).addReg(Temp).addImm(Val & 0xFFFF);
       } else {