commit 6ebf7bc7405ee79d27d50b70f0c1a474cbea820d
author Evan Cheng <evan.cheng@apple.com> Wed May 13 21:42:09 2009 +0000
committer Evan Cheng <evan.cheng@apple.com> Wed May 13 21:42:09 2009 +0000
tree fd3f08887870223c52e3eb8cb257c4377eaeb8bd
parent be1be5ef0d5a2bb52746b6bd69d4b1e88513c81a

Run code placement optimization for targets that want it (arm and x86 for now).


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@71726 91177308-0d34-0410-b5e6-96231b3b80d8

lib/CodeGen/CodePlacementOpt.cpp

diff --git a/lib/CodeGen/CodePlacementOpt.cpp b/lib/CodeGen/CodePlacementOpt.cpp
index 61a8b12..919ee54 100644
--- a/lib/CodeGen/CodePlacementOpt.cpp
+++ b/lib/CodeGen/CodePlacementOpt.cpp
@@ -104,6 +104,9 @@
 ///       jcc <cond> C, [exit]
 ///
 bool CodePlacementOpt::OptimizeIntraLoopEdges() {
+  if (!TLI->shouldOptimizeCodePlacement())
+    return false;
+
   bool Changed = false;
   for (unsigned i = 0, e = UncondJmpMBBs.size(); i != e; ++i) {
     MachineBasicBlock *MBB = UncondJmpMBBs[i].first;

lib/CodeGen/SelectionDAG/TargetLowering.cpp

diff --git a/lib/CodeGen/SelectionDAG/TargetLowering.cpp b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
index d7abd32..1bb3959 100644
--- a/lib/CodeGen/SelectionDAG/TargetLowering.cpp
+++ b/lib/CodeGen/SelectionDAG/TargetLowering.cpp
@@ -483,6 +483,7 @@
   memset(TargetDAGCombineArray, 0, array_lengthof(TargetDAGCombineArray));
   maxStoresPerMemset = maxStoresPerMemcpy = maxStoresPerMemmove = 8;
   allowUnalignedMemoryAccesses = false;
+  benefitFromCodePlacementOpt = false;
   UseUnderscoreSetJmp = false;
   UseUnderscoreLongJmp = false;
   SelectIsExpensive = false;

lib/Target/ARM/ARMISelLowering.cpp

diff --git a/lib/Target/ARM/ARMISelLowering.cpp b/lib/Target/ARM/ARMISelLowering.cpp
index 48e197d..f5b33b0 100644
--- a/lib/Target/ARM/ARMISelLowering.cpp
+++ b/lib/Target/ARM/ARMISelLowering.cpp
@@ -288,6 +288,7 @@
   setIfCvtDupBlockSizeLimit(Subtarget->isThumb() ? 0 : 2);
 
   maxStoresPerMemcpy = 1;   //// temporary - rewrite interface to use type
+  benefitFromCodePlacementOpt = true;
 }
 
 const char *ARMTargetLowering::getTargetNodeName(unsigned Opcode) const {

lib/Target/X86/X86ISelLowering.cpp

diff --git a/lib/Target/X86/X86ISelLowering.cpp b/lib/Target/X86/X86ISelLowering.cpp
index 9ac59df..debfac4 100644
--- a/lib/Target/X86/X86ISelLowering.cpp
+++ b/lib/Target/X86/X86ISelLowering.cpp
@@ -844,6 +844,7 @@
   maxStoresPerMemmove = 3; // For @llvm.memmove -> sequence of stores
   allowUnalignedMemoryAccesses = true; // x86 supports it!
   setPrefLoopAlignment(16);
+  benefitFromCodePlacementOpt = true;
 }