[PATCH] D102340: CodeGen: Fix multiple runs of VirtRegMap

[Matt Arsenault via Phabricator via llvm-commits]

arsenm created this revision.
arsenm added a reviewer: qcolombet.
Herald added subscribers: nikic, kerbowa, hiraditya, nhaehnle, jvesely.
arsenm requested review of this revision.
Herald added a subscriber: wdng.
Herald added a project: LLVM.

https://reviews.llvm.org/D102340

Files:
  llvm/lib/CodeGen/VirtRegMap.cpp
  llvm/test/CodeGen/AMDGPU/llc-pipeline.ll


Index: llvm/test/CodeGen/AMDGPU/llc-pipeline.ll
===================================================================
--- llvm/test/CodeGen/AMDGPU/llc-pipeline.ll
+++ llvm/test/CodeGen/AMDGPU/llc-pipeline.ll
@@ -366,7 +366,6 @@
 ; GCN-O1-NEXT:         Greedy Register Allocator
 ; GCN-O1-NEXT:         Virtual Register Rewriter
 ; GCN-O1-NEXT:         SI lower SGPR spill instructions
-; GCN-O1-NEXT:         Virtual Register Map
 ; GCN-O1-NEXT:         Live Register Matrix
 ; GCN-O1-NEXT:         Machine Optimization Remark Emitter
 ; GCN-O1-NEXT:         Greedy Register Allocator
@@ -655,7 +654,6 @@
 ; GCN-O1-OPTS-NEXT:         Greedy Register Allocator
 ; GCN-O1-OPTS-NEXT:         Virtual Register Rewriter
 ; GCN-O1-OPTS-NEXT:         SI lower SGPR spill instructions
-; GCN-O1-OPTS-NEXT:         Virtual Register Map
 ; GCN-O1-OPTS-NEXT:         Live Register Matrix
 ; GCN-O1-OPTS-NEXT:         Machine Optimization Remark Emitter
 ; GCN-O1-OPTS-NEXT:         Greedy Register Allocator
@@ -944,7 +942,6 @@
 ; GCN-O2-NEXT:         Greedy Register Allocator
 ; GCN-O2-NEXT:         Virtual Register Rewriter
 ; GCN-O2-NEXT:         SI lower SGPR spill instructions
-; GCN-O2-NEXT:         Virtual Register Map
 ; GCN-O2-NEXT:         Live Register Matrix
 ; GCN-O2-NEXT:         Machine Optimization Remark Emitter
 ; GCN-O2-NEXT:         Greedy Register Allocator
@@ -1246,7 +1243,6 @@
 ; GCN-O3-NEXT:         Greedy Register Allocator
 ; GCN-O3-NEXT:         Virtual Register Rewriter
 ; GCN-O3-NEXT:         SI lower SGPR spill instructions
-; GCN-O3-NEXT:         Virtual Register Map
 ; GCN-O3-NEXT:         Live Register Matrix
 ; GCN-O3-NEXT:         Machine Optimization Remark Emitter
 ; GCN-O3-NEXT:         Greedy Register Allocator
Index: llvm/lib/CodeGen/VirtRegMap.cpp
===================================================================
--- llvm/lib/CodeGen/VirtRegMap.cpp
+++ llvm/lib/CodeGen/VirtRegMap.cpp
@@ -240,8 +240,10 @@
   AU.addPreserved<LiveStacks>();
   AU.addRequired<VirtRegMap>();
 
-  if (!ClearVirtRegs)
+  if (!ClearVirtRegs) {
     AU.addPreserved<LiveDebugVariables>();
+    AU.addPreserved<VirtRegMap>();
+  }
 
   MachineFunctionPass::getAnalysisUsage(AU);
 }


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