It's not necessary to do rounding for alloca operations when the requested
alignment is equal to the stack alignment.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@40004 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/Target/ARM/ARMSubtarget.h b/lib/Target/ARM/ARMSubtarget.h
new file mode 100644
index 0000000..62367ca
--- /dev/null
+++ b/lib/Target/ARM/ARMSubtarget.h
@@ -0,0 +1,94 @@
+//=====---- ARMSubtarget.h - Define Subtarget for the ARM -----*- C++ -*--====//
+//
+// The LLVM Compiler Infrastructure
+//
+// This file was developed by Evan Cheng and is distributed under the
+// University of Illinois Open Source License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file declares the ARM specific subclass of TargetSubtarget.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef ARMSUBTARGET_H
+#define ARMSUBTARGET_H
+
+#include "llvm/Target/TargetSubtarget.h"
+#include <string>
+
+namespace llvm {
+class Module;
+
+class ARMSubtarget : public TargetSubtarget {
+protected:
+ enum ARMArchEnum {
+ V4T, V5T, V5TE, V6
+ };
+
+ /// ARMArchVersion - ARM architecture vecrsion: V4T (base), V5T, V5TE,
+ /// and V6.
+ ARMArchEnum ARMArchVersion;
+
+ /// HasVFP2 - True if the processor supports Vector Floating Point (VFP) V2
+ /// instructions.
+ bool HasVFP2;
+
+ /// IsThumb - True if we are in thumb mode, false if in ARM mode.
+ bool IsThumb;
+
+ /// UseThumbBacktraces - True if we use thumb style backtraces.
+ bool UseThumbBacktraces;
+
+ /// IsR9Reserved - True if R9 is a not available as general purpose register.
+ bool IsR9Reserved;
+
+ /// stackAlignment - The minimum alignment known to hold of the stack frame on
+ /// entry to the function and which must be maintained by every function.
+ unsigned stackAlignment;
+
+ public:
+ enum {
+ isELF, isDarwin
+ } TargetType;
+
+ enum {
+ ARM_ABI_APCS,
+ ARM_ABI_AAPCS // ARM EABI
+ } TargetABI;
+
+ /// This constructor initializes the data members to match that
+ /// of the specified module.
+ ///
+ ARMSubtarget(const Module &M, const std::string &FS, bool thumb);
+
+ /// ParseSubtargetFeatures - Parses features string setting specified
+ /// subtarget options. Definition of function is auto generated by tblgen.
+ void ParseSubtargetFeatures(const std::string &FS, const std::string &CPU);
+
+ bool hasV4TOps() const { return ARMArchVersion >= V4T; }
+ bool hasV5TOps() const { return ARMArchVersion >= V5T; }
+ bool hasV5TEOps() const { return ARMArchVersion >= V5TE; }
+ bool hasV6Ops() const { return ARMArchVersion >= V6; }
+
+ bool hasVFP2() const { return HasVFP2; }
+
+ bool isTargetDarwin() const { return TargetType == isDarwin; }
+ bool isTargetELF() const { return TargetType == isELF; }
+
+ bool isAPCS_ABI() const { return TargetABI == ARM_ABI_APCS; }
+ bool isAAPCS_ABI() const { return TargetABI == ARM_ABI_AAPCS; }
+
+ bool isThumb() const { return IsThumb; }
+
+ bool useThumbBacktraces() const { return UseThumbBacktraces; }
+ bool isR9Reserved() const { return IsR9Reserved; }
+
+ /// getStackAlignment - Returns the minimum alignment known to hold of the
+ /// stack frame on entry to the function and which must be maintained by every
+ /// function for this subtarget.
+ unsigned getStackAlignment() const { return stackAlignment; }
+};
+} // End llvm namespace
+
+#endif // ARMSUBTARGET_H