Teach if-converter to be more careful with predicating instructions that would
take multiple cycles to decode.
For the current if-converter clients (actually only ARM), the instructions that
are predicated on false are not nops. They would still take machine cycles to
decode. Micro-coded instructions such as LDM / STM can potentially take multiple
cycles to decode. If-converter should take treat them as non-micro-coded
simple instructions.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@113570 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMSubtarget.h b/lib/Target/ARM/ARMSubtarget.h
index 67e5803..34f571f 100644
--- a/lib/Target/ARM/ARMSubtarget.h
+++ b/lib/Target/ARM/ARMSubtarget.h
@@ -29,6 +29,10 @@
V4, V4T, V5T, V5TE, V6, V6M, V6T2, V7A, V7M
};
+ enum ARMProcFamilyEnum {
+ Others, CortexA8, CortexA9
+ };
+
enum ARMFPEnum {
None, VFPv2, VFPv3, NEON
};
@@ -42,6 +46,9 @@
/// V6, V6T2, V7A, V7M.
ARMArchEnum ARMArchVersion;
+ /// ARMProcFamily - ARM processor family: Cortex-A8, Cortex-A9, and others.
+ ARMProcFamilyEnum ARMProcFamily;
+
/// ARMFPUType - Floating Point Unit type.
ARMFPEnum ARMFPUType;
@@ -143,6 +150,9 @@
bool hasV6T2Ops() const { return ARMArchVersion >= V6T2; }
bool hasV7Ops() const { return ARMArchVersion >= V7A; }
+ bool isCortexA8() const { return ARMProcFamily == CortexA8; }
+ bool isCortexA9() const { return ARMProcFamily == CortexA9; }
+
bool hasARMOps() const { return !NoARM; }
bool hasVFP2() const { return ARMFPUType >= VFPv2; }