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| author | Chris Lattner <sabre@nondot.org> | 2009-09-08 04:55:44 +0000 |
|---|---|---|
| committer | Chris Lattner <sabre@nondot.org> | 2009-09-08 04:55:44 +0000 |
| commit | c3195875c346108303d315cac0c245d80f980dfb (patch) | |
| tree | ffc896d40cc31d248813ebded64c1c366a0da83a /lib/Target | |
| parent | d069a058917c5968774064354516f628159971c6 (diff) | |
| download | external_llvm-c3195875c346108303d315cac0c245d80f980dfb.zip external_llvm-c3195875c346108303d315cac0c245d80f980dfb.tar.gz external_llvm-c3195875c346108303d315cac0c245d80f980dfb.tar.bz2 | |
fix PR4767, a crash because fp stackifier visited blocks in
depth first order, so it wouldn't process unreachable blocks.
When compiling at -O0, late dead block elimination isn't done
and the bad instructions got to isel.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@81187 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target')
| -rw-r--r-- | lib/Target/X86/X86FloatingPoint.cpp | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/lib/Target/X86/X86FloatingPoint.cpp b/lib/Target/X86/X86FloatingPoint.cpp index af0da6f..d9a05a8 100644 --- a/lib/Target/X86/X86FloatingPoint.cpp +++ b/lib/Target/X86/X86FloatingPoint.cpp @@ -213,6 +213,14 @@ bool FPS::runOnMachineFunction(MachineFunction &MF) { I != E; ++I) Changed |= processBasicBlock(MF, **I); + // Process any unreachable blocks in arbitrary order now. + if (MF.size() == Processed.size()) + return Changed; + + for (MachineFunction::iterator BB = MF.begin(), E = MF.end(); BB != E; ++BB) + if (Processed.insert(BB)) + Changed |= processBasicBlock(MF, *BB); + return Changed; } |