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
..
.cvsignore	ignore generated files	2004-11-21 00:01:54 +00:00
Makefile	Change Library Names Not To Conflict With Others When Installed	2004-10-27 23:18:45 +00:00
X86.h	Add -sse[,2,3] arguments to LLC	2004-08-24 08:18:44 +00:00
X86.td	Add support for the -x86-asm-syntax flag, which can be used to choose between	2004-10-03 20:36:57 +00:00
X86AsmPrinter.cpp	GhostLinkage should not reach asm printing stage	2004-11-14 21:03:49 +00:00
X86CodeEmitter.cpp	There is no reason to emit function stubs for direct calls.	2004-11-21 03:46:06 +00:00
X86FloatingPoint.cpp	Changes For Bug 352	2004-09-01 22:55:40 +00:00
X86InstrBuilder.h	Allow X86 addressing modes to represent globals with offsets. Patch contributed	2004-10-15 04:43:20 +00:00
X86InstrInfo.cpp
X86InstrInfo.h	Remove a bunch of ad-hoc target-specific flags that were only used by the	2004-08-11 07:12:04 +00:00
X86InstrInfo.td	Correct the name of stosd for the AT&T syntax:	2004-11-10 04:48:15 +00:00
X86ISelPattern.cpp	Disable the pattern isel	2004-08-15 23:02:17 +00:00
X86ISelSimple.cpp	Revamp long/ulong comparisons to use a much more efficient sequence (thanks	2004-11-29 05:55:24 +00:00
X86JITInfo.cpp	Do not push two return addresses on the stack when we call external functions who have their addresses taken. This fixes test-call.ll	2004-11-22 22:25:30 +00:00
X86JITInfo.h	We implement these interfaces	2004-11-20 23:53:56 +00:00
X86PeepholeOpt.cpp	Add some new instructions. Fix the asm string for sbb32rr	2004-10-06 04:01:02 +00:00
X86RegisterInfo.cpp	Add some new instructions. Fix the asm string for sbb32rr	2004-10-06 04:01:02 +00:00
X86RegisterInfo.h	Code insertion methods now return void instead of an int.	2004-08-15 22:15:11 +00:00
X86RegisterInfo.td	The real x87 floating point registers should not be allocatable. They	2004-09-21 21:22:11 +00:00
X86Relocations.h	Describe the X86 target-specific relocations.	2004-11-20 23:54:19 +00:00
X86TargetMachine.cpp	Fix a warning	2004-11-02 15:27:57 +00:00
X86TargetMachine.h	Remove a dead function, which died when we got GAS emission working (phwew,	2004-11-16 04:34:29 +00:00