diff options
| author | Pete Cooper <peter_cooper@apple.com> | 2011-11-08 18:42:53 +0000 |
|---|---|---|
| committer | Pete Cooper <peter_cooper@apple.com> | 2011-11-08 18:42:53 +0000 |
| commit | d752e0f7e64585839cb3a458ef52456eaebbea3c (patch) | |
| tree | 79cfeacd373fe93faadfc504b54da791046bd87d /lib/CodeGen/MachineInstr.cpp | |
| parent | 30b4d8b83b7b3995ac1b53f35d3110d48676b187 (diff) | |
| download | external_llvm-d752e0f7e64585839cb3a458ef52456eaebbea3c.zip external_llvm-d752e0f7e64585839cb3a458ef52456eaebbea3c.tar.gz external_llvm-d752e0f7e64585839cb3a458ef52456eaebbea3c.tar.bz2 | |
Added invariant field to the DAG.getLoad method and changed all calls.
When this field is true it means that the load is from constant (runt-time or compile-time) and so can be hoisted from loops or moved around other memory accesses
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@144100 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/CodeGen/MachineInstr.cpp')
| -rw-r--r-- | lib/CodeGen/MachineInstr.cpp | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/CodeGen/MachineInstr.cpp b/lib/CodeGen/MachineInstr.cpp index a240667..b0ef9d4 100644 --- a/lib/CodeGen/MachineInstr.cpp +++ b/lib/CodeGen/MachineInstr.cpp @@ -1253,6 +1253,7 @@ bool MachineInstr::isInvariantLoad(AliasAnalysis *AA) const { E = memoperands_end(); I != E; ++I) { if ((*I)->isVolatile()) return false; if ((*I)->isStore()) return false; + if ((*I)->isInvariant()) return true; if (const Value *V = (*I)->getValue()) { // A load from a constant PseudoSourceValue is invariant. |