diff options
| author | Hal Finkel <hfinkel@anl.gov> | 2013-07-18 04:28:21 +0000 |
|---|---|---|
| committer | Hal Finkel <hfinkel@anl.gov> | 2013-07-18 04:28:21 +0000 |
| commit | aad2a72c285a48e34d89ba69d24eb624f2b09b0e (patch) | |
| tree | cbc687b35049ae985b9b34a1a694fc4a5e72bded /lib/Analysis/NoAliasAnalysis.cpp | |
| parent | 1c881d9d35a7880d0c102119b29d20ceb2ed1975 (diff) | |
| download | external_llvm-aad2a72c285a48e34d89ba69d24eb624f2b09b0e.zip external_llvm-aad2a72c285a48e34d89ba69d24eb624f2b09b0e.tar.gz external_llvm-aad2a72c285a48e34d89ba69d24eb624f2b09b0e.tar.bz2 | |
PPC: Support dynamic allocas with large alignment
Support for dynamic stack alignments in the PPC backend has been unfinished, in
part because it depends on dynamic stack realignment (which I only just
recently implemented fully). Now we can also support dynamic allocas with
higher than the default target stack alignment (16 bytes).
In order to round-up the requested size to the maximum requested alignment, we
need an additional register to hold the rounded-up size. We're already using one
scavenged register to hold the previous stack-pointer value (which needs to be
stored with the signal-safe stdux update), and so when we have dynamic allocas
and a large alignment, we allocate two emergency spill slots for the scavenger.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@186562 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Analysis/NoAliasAnalysis.cpp')
0 files changed, 0 insertions, 0 deletions