Chris Lattner ce7cafa960 shld is a very high latency operation. Instead of emitting it for shifts of ... two or three, open code the equivalent operation which is faster on athlon and P4 (by a substantial margin). For example, instead of compiling this: long long X2(long long Y) { return Y << 2; } to: X3_2: movl 4(%esp), %eax movl 8(%esp), %edx shldl $2, %eax, %edx shll $2, %eax ret Compile it to: X2: movl 4(%esp), %eax movl 8(%esp), %ecx movl %eax, %edx shrl $30, %edx leal (%edx,%ecx,4), %edx shll $2, %eax ret Likewise, for << 3, compile to: X3: movl 4(%esp), %eax movl 8(%esp), %ecx movl %eax, %edx shrl $29, %edx leal (%edx,%ecx,8), %edx shll $3, %eax ret This matches icc, except that icc open codes the shifts as adds on the P4. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@17707 91177308-0d34-0410-b5e6-96231b3b80d8		2004-11-13 20:48:57 +00:00
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CBackend	Change Library Names Not To Conflict With Others When Installed	2004-10-27 23:18:45 +00:00
PowerPC	Allow hbd to be bugpointable on darwin by fixing common and linkonce codegen	2004-11-09 04:01:18 +00:00
Skeleton	Change Library Names Not To Conflict With Others When Installed	2004-10-27 23:18:45 +00:00
Sparc	Handle "call" operands of type long/ulong passed in registers.	2004-11-04 00:27:04 +00:00
SparcV8	Handle "call" operands of type long/ulong passed in registers.	2004-11-04 00:27:04 +00:00
SparcV9	Decompose* is V9 specific, make it internal	2004-11-07 00:43:24 +00:00
X86	shld is a very high latency operation. Instead of emitting it for shifts of	2004-11-13 20:48:57 +00:00
Makefile	Change Library Names Not To Conflict With Others When Installed	2004-10-27 23:18:45 +00:00
MRegisterInfo.cpp	Move destructor out of line to avoid vtable emission in every file that includes the header. Thanks to sabre.	2004-10-27 06:00:53 +00:00
Target.td	Add isLittleEndianEncoding to InstrInfo class, defaults to `off'	2004-10-14 05:53:40 +00:00
TargetData.cpp	Fix this function to not say that longs have 8-byte alignment on X86/PPC.	2004-11-02 22:18:18 +00:00
TargetFrameInfo.cpp	Remove dead methods	2004-08-12 18:37:15 +00:00
TargetInstrInfo.cpp	ConstantTypeMustBeLoaded has been incorporated into SparcV9PreSelection, its	2004-07-27 21:43:38 +00:00
TargetMachine.cpp	Changes For Bug 352	2004-09-01 22:55:40 +00:00
TargetMachineRegistry.cpp
TargetSchedInfo.cpp	Remove dead assert	2004-10-25 19:04:01 +00:00