From 8b61764cbba4136e038fd94e035f1e965c82ba52 Mon Sep 17 00:00:00 2001
From: Francis Visoiu Mistrih <fvisoiumistrih@apple.com>
Date: Thu, 18 May 2017 17:21:13 +0000
Subject: [LegacyPassManager] Remove TargetMachine constructors

This provides a new way to access the TargetMachine through
TargetPassConfig, as a dependency.

The patterns replaced here are:

* Passes handling a null TargetMachine call
  `getAnalysisIfAvailable<TargetPassConfig>`.

* Passes not handling a null TargetMachine
  `addRequired<TargetPassConfig>` and call
  `getAnalysis<TargetPassConfig>`.

* MachineFunctionPasses now use MF.getTarget().

* Remove all the TargetMachine constructors.
* Remove INITIALIZE_TM_PASS.

This fixes a crash when running `llc -start-before prologepilog`.

PEI needs StackProtector, which gets constructed without a TargetMachine
by the pass manager. The StackProtector pass doesn't handle the case
where there is no TargetMachine, so it segfaults.

Related to PR30324.

Differential Revision: https://reviews.llvm.org/D33222

llvm-svn: 303360
---
 llvm/lib/Target/Hexagon/HexagonTargetMachine.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'llvm/lib/Target/Hexagon/HexagonTargetMachine.cpp')

diff --git a/llvm/lib/Target/Hexagon/HexagonTargetMachine.cpp b/llvm/lib/Target/Hexagon/HexagonTargetMachine.cpp
index 6913d50bbca..8e93df6201a 100644
--- a/llvm/lib/Target/Hexagon/HexagonTargetMachine.cpp
+++ b/llvm/lib/Target/Hexagon/HexagonTargetMachine.cpp
@@ -252,7 +252,7 @@ void HexagonPassConfig::addIRPasses() {
   TargetPassConfig::addIRPasses();
   bool NoOpt = (getOptLevel() == CodeGenOpt::None);
 
-  addPass(createAtomicExpandPass(TM));
+  addPass(createAtomicExpandPass());
   if (!NoOpt) {
     if (EnableLoopPrefetch)
       addPass(createLoopDataPrefetchPass());
-- 
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