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authorDimitry Andric <dim@FreeBSD.org>2020-01-24 22:00:03 +0000
committerDimitry Andric <dim@FreeBSD.org>2020-01-24 22:00:03 +0000
commit480093f4440d54b30b3025afeac24b48f2ba7a2e (patch)
tree162e72994062888647caf0d875428db9445491a8 /contrib/llvm-project/llvm/lib/CodeGen/ImplicitNullChecks.cpp
parent489b1cf2ecf5b9b4a394857987014bfb09067726 (diff)
parent706b4fc47bbc608932d3b491ae19a3b9cde9497b (diff)
Notes
Diffstat (limited to 'contrib/llvm-project/llvm/lib/CodeGen/ImplicitNullChecks.cpp')
-rw-r--r--contrib/llvm-project/llvm/lib/CodeGen/ImplicitNullChecks.cpp5
1 files changed, 3 insertions, 2 deletions
diff --git a/contrib/llvm-project/llvm/lib/CodeGen/ImplicitNullChecks.cpp b/contrib/llvm-project/llvm/lib/CodeGen/ImplicitNullChecks.cpp
index b7dcaec90106..0bbedb0a5ea6 100644
--- a/contrib/llvm-project/llvm/lib/CodeGen/ImplicitNullChecks.cpp
+++ b/contrib/llvm-project/llvm/lib/CodeGen/ImplicitNullChecks.cpp
@@ -50,6 +50,7 @@
#include "llvm/IR/BasicBlock.h"
#include "llvm/IR/DebugLoc.h"
#include "llvm/IR/LLVMContext.h"
+#include "llvm/InitializePasses.h"
#include "llvm/MC/MCInstrDesc.h"
#include "llvm/MC/MCRegisterInfo.h"
#include "llvm/Pass.h"
@@ -371,7 +372,7 @@ ImplicitNullChecks::isSuitableMemoryOp(const MachineInstr &MI,
// We want the mem access to be issued at a sane offset from PointerReg,
// so that if PointerReg is null then the access reliably page faults.
- if (!((MI.mayLoad() || MI.mayStore()) && !MI.isPredicable() &&
+ if (!(MI.mayLoadOrStore() && !MI.isPredicable() &&
-PageSize < Offset && Offset < PageSize))
return SR_Unsuitable;
@@ -697,7 +698,7 @@ void ImplicitNullChecks::rewriteNullChecks(
if (auto *DepMI = NC.getOnlyDependency()) {
for (auto &MO : DepMI->operands()) {
- if (!MO.isReg() || !MO.getReg() || !MO.isDef())
+ if (!MO.isReg() || !MO.getReg() || !MO.isDef() || MO.isDead())
continue;
if (!NC.getNotNullSucc()->isLiveIn(MO.getReg()))
NC.getNotNullSucc()->addLiveIn(MO.getReg());