[llvm-commits] [llvm] r86858 - in /llvm/trunk: include/llvm/Target/TargetLowering.h lib/Target/ARM/ARMISelLowering.cpp lib/Target/ARM/ARMISelLowering.h
Evan Cheng
evan.cheng at apple.com
Wed Nov 11 11:05:53 PST 2009
Author: evancheng
Date: Wed Nov 11 13:05:52 2009
New Revision: 86858
URL: http://llvm.org/viewvc/llvm-project?rev=86858&view=rev
Log:
Add TargetLowering::isLegalICmpImmediate. It tells LSR what immediate can be folded into target icmp instructions.
Modified:
llvm/trunk/include/llvm/Target/TargetLowering.h
llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp
llvm/trunk/lib/Target/ARM/ARMISelLowering.h
Modified: llvm/trunk/include/llvm/Target/TargetLowering.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/include/llvm/Target/TargetLowering.h?rev=86858&r1=86857&r2=86858&view=diff
==============================================================================
--- llvm/trunk/include/llvm/Target/TargetLowering.h (original)
+++ llvm/trunk/include/llvm/Target/TargetLowering.h Wed Nov 11 13:05:52 2009
@@ -1514,6 +1514,14 @@
return false;
}
+ /// isLegalICmpImmediate - Return true if the specified immediate is legal
+ /// icmp immediate, that is the target has icmp instructions which can compare
+ /// a register against the immediate without having to materialize the
+ /// immediate into a register.
+ virtual bool isLegalICmpImmediate(uint64_t Imm) const {
+ return true;
+ }
+
//===--------------------------------------------------------------------===//
// Div utility functions
//
Modified: llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp?rev=86858&r1=86857&r2=86858&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp (original)
+++ llvm/trunk/lib/Target/ARM/ARMISelLowering.cpp Wed Nov 11 13:05:52 2009
@@ -3706,6 +3706,18 @@
return true;
}
+/// isLegalICmpImmediate - Return true if the specified immediate is legal
+/// icmp immediate, that is the target has icmp instructions which can compare
+/// a register against the immediate without having to materialize the
+/// immediate into a register.
+bool ARMTargetLowering::isLegalICmpImmediate(uint64_t Imm) const {
+ if (!Subtarget->isThumb())
+ return ARM_AM::getSOImmVal(Imm) != -1;
+ if (Subtarget->isThumb2())
+ return ARM_AM::getT2SOImmVal(Imm) != -1;
+ return Imm < 256;
+}
+
static bool getARMIndexedAddressParts(SDNode *Ptr, EVT VT,
bool isSEXTLoad, SDValue &Base,
SDValue &Offset, bool &isInc,
Modified: llvm/trunk/lib/Target/ARM/ARMISelLowering.h
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/ARM/ARMISelLowering.h?rev=86858&r1=86857&r2=86858&view=diff
==============================================================================
--- llvm/trunk/lib/Target/ARM/ARMISelLowering.h (original)
+++ llvm/trunk/lib/Target/ARM/ARMISelLowering.h Wed Nov 11 13:05:52 2009
@@ -180,6 +180,12 @@
virtual bool isLegalAddressingMode(const AddrMode &AM, const Type *Ty)const;
bool isLegalT2ScaledAddressingMode(const AddrMode &AM, EVT VT) const;
+ /// isLegalICmpImmediate - Return true if the specified immediate is legal
+ /// icmp immediate, that is the target has icmp instructions which can compare
+ /// a register against the immediate without having to materialize the
+ /// immediate into a register.
+ virtual bool isLegalICmpImmediate(uint64_t Imm) const;
+
/// getPreIndexedAddressParts - returns true by value, base pointer and
/// offset pointer and addressing mode by reference if the node's address
/// can be legally represented as pre-indexed load / store address.
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