Add section switching to common code generator code. Add a couple of
asserts.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@24445 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/CodeGen/AsmPrinter.cpp b/lib/CodeGen/AsmPrinter.cpp
index d81846b..9faea70 100644
--- a/lib/CodeGen/AsmPrinter.cpp
+++ b/lib/CodeGen/AsmPrinter.cpp
@@ -19,8 +19,27 @@
#include "llvm/Target/TargetMachine.h"
using namespace llvm;
+/// SwitchSection - Switch to the specified section of the executable if we
+/// are not already in it!
+///
+void AsmPrinter::SwitchSection(const char *NewSection, const GlobalValue *GV) {
+ std::string NS;
+
+ if (GV && GV->hasSection())
+ NS = ".section " + GV->getSection();
+ else
+ NS = NewSection;
+
+ if (CurrentSection != NS) {
+ CurrentSection = NS;
+ if (!CurrentSection.empty())
+ O << "\t" << CurrentSection << "\n";
+ }
+}
+
bool AsmPrinter::doInitialization(Module &M) {
Mang = new Mangler(M, GlobalPrefix);
+ SwitchSection("", 0); // Reset back to no section.
return false;
}
diff --git a/lib/CodeGen/LiveVariables.cpp b/lib/CodeGen/LiveVariables.cpp
index cb034c0..a1bda19 100644
--- a/lib/CodeGen/LiveVariables.cpp
+++ b/lib/CodeGen/LiveVariables.cpp
@@ -278,10 +278,11 @@
MachineOperand &MO = MI->getOperand(i);
if (!MO.getVRegValueOrNull()) {
VarInfo &VRInfo = getVarInfo(MO.getReg());
+ assert(VRInfo.DefInst && "Register use before def (or no def)!");
- // Only mark it alive only in the block we are representing...
+ // Only mark it alive only in the block we are representing.
MarkVirtRegAliveInBlock(VRInfo, MBB);
- break; // Found the PHI entry for this block...
+ break; // Found the PHI entry for this block.
}
}
}
diff --git a/lib/CodeGen/RegAllocLinearScan.cpp b/lib/CodeGen/RegAllocLinearScan.cpp
index a42a366..9bad0d3 100644
--- a/lib/CodeGen/RegAllocLinearScan.cpp
+++ b/lib/CodeGen/RegAllocLinearScan.cpp
@@ -547,6 +547,7 @@
minReg = reg;
}
}
+ assert(minReg && "Didn't find any reg!");
DEBUG(std::cerr << "\t\tregister with min weight: "
<< mri_->getName(minReg) << " (" << minWeight << ")\n");