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| author | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-04-20 22:14:20 +0000 |
|---|---|---|
| committer | Jakob Stoklund Olesen <stoklund@2pi.dk> | 2011-04-20 22:14:20 +0000 |
| commit | 3b7d917dec53a742fcb14802557ee75d35185968 (patch) | |
| tree | 681aea6f3a0796c561b21edeb65478422e6f1565 | |
| parent | 08c5a347a05e73a34c70ec8b694b1e89b96a6bf5 (diff) | |
Add debug output for rematerializable instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@129883 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/CodeGen/InlineSpiller.cpp | 6 | ||||
| -rw-r--r-- | lib/CodeGen/LiveRangeEdit.cpp | 8 | ||||
| -rw-r--r-- | lib/CodeGen/LiveRangeEdit.h | 2 |
3 files changed, 10 insertions, 6 deletions
diff --git a/lib/CodeGen/InlineSpiller.cpp b/lib/CodeGen/InlineSpiller.cpp index bcbe718bc8..0a785565f6 100644 --- a/lib/CodeGen/InlineSpiller.cpp +++ b/lib/CodeGen/InlineSpiller.cpp @@ -420,8 +420,10 @@ void InlineSpiller::analyzeSiblingValues() { } if (!DefMI && !VNI->isPHIDef()) DefMI = LIS.getInstructionFromIndex(VNI->def); - if (DefMI) - Edit->checkRematerializable(VNI, DefMI, TII, AA); + if (DefMI && Edit->checkRematerializable(VNI, DefMI, TII, AA)) { + DEBUG(dbgs() << "Value " << PrintReg(Reg) << ':' << VNI->id << '@' + << VNI->def << " may remat from " << *DefMI); + } } } } diff --git a/lib/CodeGen/LiveRangeEdit.cpp b/lib/CodeGen/LiveRangeEdit.cpp index b1dc9019cc..443cc2e904 100644 --- a/lib/CodeGen/LiveRangeEdit.cpp +++ b/lib/CodeGen/LiveRangeEdit.cpp @@ -36,14 +36,16 @@ LiveInterval &LiveRangeEdit::createFrom(unsigned OldReg, return LI; } -void LiveRangeEdit::checkRematerializable(VNInfo *VNI, +bool LiveRangeEdit::checkRematerializable(VNInfo *VNI, const MachineInstr *DefMI, const TargetInstrInfo &tii, AliasAnalysis *aa) { assert(DefMI && "Missing instruction"); - if (tii.isTriviallyReMaterializable(DefMI, aa)) - remattable_.insert(VNI); scannedRemattable_ = true; + if (!tii.isTriviallyReMaterializable(DefMI, aa)) + return false; + remattable_.insert(VNI); + return true; } void LiveRangeEdit::scanRemattable(LiveIntervals &lis, diff --git a/lib/CodeGen/LiveRangeEdit.h b/lib/CodeGen/LiveRangeEdit.h index 54a2c83fd6..c008d7647d 100644 --- a/lib/CodeGen/LiveRangeEdit.h +++ b/lib/CodeGen/LiveRangeEdit.h @@ -137,7 +137,7 @@ public: /// checkRematerializable - Manually add VNI to the list of rematerializable /// values if DefMI may be rematerializable. - void checkRematerializable(VNInfo *VNI, const MachineInstr *DefMI, + bool checkRematerializable(VNInfo *VNI, const MachineInstr *DefMI, const TargetInstrInfo&, AliasAnalysis*); /// Remat - Information needed to rematerialize at a specific location. |