ARM: Add Performance Monitor Extensions feature
Performance monitors, including a basic cycle counter, are an official
extension in the ARMv7 specification. This adds support for enabling and
disabling them, orthogonally from CPU selection.
rdar://problem/13939186
llvm-svn: 182602
diff --git a/llvm/lib/Target/ARM/ARMSubtarget.h b/llvm/lib/Target/ARM/ARMSubtarget.h
index d013165..bc5af96 100644
--- a/llvm/lib/Target/ARM/ARMSubtarget.h
+++ b/llvm/lib/Target/ARM/ARMSubtarget.h
@@ -148,6 +148,11 @@
/// precision.
bool FPOnlySP;
+ /// If true, the processor supports the Performance Monitor Extensions. These
+ /// include a generic cycle-counter as well as more fine-grained (often
+ /// implementation-specific) events.
+ bool HasPerfMon;
+
/// HasTrustZone - if true, processor supports TrustZone security extensions
bool HasTrustZone;
@@ -254,6 +259,7 @@
bool hasVMLxForwarding() const { return HasVMLxForwarding; }
bool isFPBrccSlow() const { return SlowFPBrcc; }
bool isFPOnlySP() const { return FPOnlySP; }
+ bool hasPerfMon() const { return HasPerfMon; }
bool hasTrustZone() const { return HasTrustZone; }
bool prefers32BitThumb() const { return Pref32BitThumb; }
bool avoidCPSRPartialUpdate() const { return AvoidCPSRPartialUpdate; }