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| author | Dan Gohman <gohman@apple.com> | 2008-12-03 19:30:13 +0000 |
|---|---|---|
| committer | Dan Gohman <gohman@apple.com> | 2008-12-03 19:30:13 +0000 |
| commit | 1a32dda4aa1ca008468738aedd100ac389ba6bd9 (patch) | |
| tree | 692c632b35fc81998f32031f012c8ecfb25e2e36 /llvm/lib/CodeGen | |
| parent | d49ceff6bad1aeca83f39806e732a58fac3e6ee2 (diff) | |
| download | bcm5719-llvm-1a32dda4aa1ca008468738aedd100ac389ba6bd9.tar.gz bcm5719-llvm-1a32dda4aa1ca008468738aedd100ac389ba6bd9.zip | |
Add a comment about callee-saved registers.
llvm-svn: 60495
Diffstat (limited to 'llvm/lib/CodeGen')
| -rw-r--r-- | llvm/lib/CodeGen/PostRASchedulerList.cpp | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/llvm/lib/CodeGen/PostRASchedulerList.cpp b/llvm/lib/CodeGen/PostRASchedulerList.cpp index 09125d04887..bd9783281cc 100644 --- a/llvm/lib/CodeGen/PostRASchedulerList.cpp +++ b/llvm/lib/CodeGen/PostRASchedulerList.cpp @@ -278,6 +278,8 @@ bool SchedulePostRATDList::BreakAntiDependencies() { // TODO: If the callee saves and restores these, then we can potentially // use them between the save and the restore. To do that, we could scan // the exit blocks to see which of these registers are defined. + // Alternatively, calle-saved registers that aren't saved and restored + // could be marked live-in in every block. for (const unsigned *I = TRI->getCalleeSavedRegs(); *I; ++I) { unsigned Reg = *I; Classes[Reg] = reinterpret_cast<TargetRegisterClass *>(-1); |
