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[safestack] Requires a valid TargetMachine to be passed to the SafeStack pass.

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Patch by Michael LeMay

Differential revision: http://reviews.llvm.org/D24896

llvm-svn: 283248
This commit is contained in:
David L Kreitzer
2016-10-04 20:31:32 +00:00
parent bab7943c6c
commit fedb9b67ca
1 changed files with 6 additions and 7 deletions
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13
llvm/lib/CodeGen/SafeStack.cpp
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@@ -358,9 +358,8 @@ bool SafeStack::IsSafeStackAlloca(const Value *AllocaPtr, uint64_t AllocaSize) {
Value *SafeStack::getOrCreateUnsafeStackPtr(IRBuilder<> &IRB, Function &F) {
// Check if there is a target-specific location for the unsafe stack pointer.
if (TL)
if (Value *V = TL->getSafeStackPointerLocation(IRB))
return V;
if (Value *V = TL->getSafeStackPointerLocation(IRB))
return V;
// Otherwise, assume the target links with compiler-rt, which provides a
// thread-local variable with a magic name.
@@ -393,9 +392,7 @@ Value *SafeStack::getOrCreateUnsafeStackPtr(IRBuilder<> &IRB, Function &F) {
}
Value *SafeStack::getStackGuard(IRBuilder<> &IRB, Function &F) {
Value *StackGuardVar = nullptr;
if (TL)
StackGuardVar = TL->getIRStackGuard(IRB);
Value *StackGuardVar = TL->getIRStackGuard(IRB);
if (!StackGuardVar)
StackGuardVar =
F.getParent()->getOrInsertGlobal("__stack_chk_guard", StackPtrTy);
@@ -752,7 +749,9 @@ bool SafeStack::runOnFunction(Function &F) {
return false;
}
TL = TM ? TM->getSubtargetImpl(F)->getTargetLowering() : nullptr;
if (!TM)
report_fatal_error("Target machine is required");
TL = TM->getSubtargetImpl(F)->getTargetLowering();
SE = &getAnalysis<ScalarEvolutionWrapperPass>().getSE();
++NumFunctions;