Chris Lattner 928b47ae2e Revamp long/ulong comparisons to use a much more efficient sequence (thanks ... to Brian and the Sun compiler for pointing out that the obvious works :) This also enables folding all long comparisons into setcc and branch instructions: before we could only do == and != For example, for: void test(unsigned long long A, unsigned long long B) { if (A < B) foo(); } We now generate: test: subl $4, %esp movl %esi, (%esp) movl 8(%esp), %eax movl 12(%esp), %ecx movl 16(%esp), %edx movl 20(%esp), %esi subl %edx, %eax sbbl %esi, %ecx jae .LBBtest_2 # UnifiedReturnBlock .LBBtest_1: # then call foo movl (%esp), %esi addl $4, %esp ret .LBBtest_2: # UnifiedReturnBlock movl (%esp), %esi addl $4, %esp ret Instead of: test: subl $12, %esp movl %esi, 8(%esp) movl %ebx, 4(%esp) movl 16(%esp), %eax movl 20(%esp), %ecx movl 24(%esp), %edx movl 28(%esp), %esi cmpl %edx, %eax setb %al cmpl %esi, %ecx setb %bl cmove %ax, %bx testb %bl, %bl je .LBBtest_2 # UnifiedReturnBlock .LBBtest_1: # then call foo movl 4(%esp), %ebx movl 8(%esp), %esi addl $12, %esp ret .LBBtest_2: # UnifiedReturnBlock movl 4(%esp), %ebx movl 8(%esp), %esi addl $12, %esp ret git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@18330 91177308-0d34-0410-b5e6-96231b3b80d8		2004-11-29 05:55:24 +00:00
..
CBackend	Hack around stupidity in GCC, fixing Burg with the CBE and	2004-11-13 22:21:56 +00:00
PowerPC	The LLVM bool type shall have 1 byte alignment on PPC.	2004-11-28 21:16:45 +00:00
Skeleton	ignore generated files	2004-11-21 00:01:54 +00:00
Sparc	Update list of failing benchmarks.	2004-11-24 04:07:42 +00:00
SparcV8	Update list of failing benchmarks.	2004-11-24 04:07:42 +00:00
SparcV9	Reworked branching so we don't handle BAs specially. It just updates the branchTO regardless of what type of branch it is.	2004-11-29 04:39:47 +00:00
X86	Revamp long/ulong comparisons to use a much more efficient sequence (thanks	2004-11-29 05:55:24 +00:00
Makefile	Fix file comment header	2004-11-19 22:09:21 +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	Implement TargetRegistrationListener	2004-07-11 06:03:21 +00:00
TargetSchedInfo.cpp	Remove dead assert	2004-10-25 19:04:01 +00:00