[ARM] Add PostRAScheduler option
This patch adds the option to allow also using the PostRA scheduler,
which brings the ARM backend inline with AArch64 targets. The
SchedModel can also set 'PostRAScheduler', as the R52 does, so also
query this property in the overridden function.
Differential Revision: https://reviews.llvm.org/D36866
llvm-svn: 311162
diff --git a/llvm/lib/Target/ARM/ARMSubtarget.h b/llvm/lib/Target/ARM/ARMSubtarget.h
index 0ca37e5..0c4715d 100644
--- a/llvm/lib/Target/ARM/ARMSubtarget.h
+++ b/llvm/lib/Target/ARM/ARMSubtarget.h
@@ -191,6 +191,10 @@
/// UseMISched - True if MachineScheduler should be used for this subtarget.
bool UseMISched = false;
+ /// UsePostRAScheduler - True if scheduling should happen again after
+ /// register allocation.
+ bool UsePostRAScheduler = false;
+
/// HasThumb2 - True if Thumb2 instructions are supported.
bool HasThumb2 = false;
@@ -660,6 +664,7 @@
bool isRWPI() const;
bool useMachineScheduler() const { return UseMISched; }
+ bool usePostRAScheduler() const { return UsePostRAScheduler; }
bool useSoftFloat() const { return UseSoftFloat; }
bool isThumb() const { return InThumbMode; }
bool isThumb1Only() const { return InThumbMode && !HasThumb2; }