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author | Preston Gurd <preston.gurd@intel.com> | 2013-03-27 19:14:02 +0000 |
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committer | Preston Gurd <preston.gurd@intel.com> | 2013-03-27 19:14:02 +0000 |
commit | 1edadea42f6f5c393b4fdb9d7ce1cf7eb9c24ab4 (patch) | |
tree | 0703e20d41246fa36a72779d0d1ba5b58b6ee2d7 /lib/Target/X86/X86Subtarget.h | |
parent | e915047fed99221afb8c540d8a7e81038a6483f1 (diff) | |
download | llvm-1edadea42f6f5c393b4fdb9d7ce1cf7eb9c24ab4.tar.gz llvm-1edadea42f6f5c393b4fdb9d7ce1cf7eb9c24ab4.tar.bz2 llvm-1edadea42f6f5c393b4fdb9d7ce1cf7eb9c24ab4.tar.xz |
For the current Atom processor, the fastest way to handle a call
indirect through a memory address is to load the memory address into
a register and then call indirect through the register.
This patch implements this improvement by modifying SelectionDAG to
force a function address which is a memory reference to be loaded
into a virtual register.
Patch by Sriram Murali.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@178171 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/X86/X86Subtarget.h')
-rw-r--r-- | lib/Target/X86/X86Subtarget.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/lib/Target/X86/X86Subtarget.h b/lib/Target/X86/X86Subtarget.h index 108ef0eb1c..cac3f579b0 100644 --- a/lib/Target/X86/X86Subtarget.h +++ b/lib/Target/X86/X86Subtarget.h @@ -159,6 +159,10 @@ protected: /// a stall when returning too early. bool PadShortFunctions; + /// CallRegIndirect - True if the Calls with memory reference should be converted + /// to a register-based indirect call. + bool CallRegIndirect; + /// 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; @@ -269,6 +273,7 @@ public: bool useLeaForSP() const { return UseLeaForSP; } bool hasSlowDivide() const { return HasSlowDivide; } bool padShortFunctions() const { return PadShortFunctions; } + bool callRegIndirect() const { return CallRegIndirect; } bool isAtom() const { return X86ProcFamily == IntelAtom; } |