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
..
Analysis	Fix DeadStoreElimination/2004-11-28-LiveStoreDeleted.ll	2004-11-28 20:30:15 +00:00
Archive	Compute the firstFileOffset correctly after reading the LLVM symbol table.	2004-11-28 03:13:02 +00:00
AsmParser	Fix PR463	2004-11-28 16:45:45 +00:00
Bytecode	Compute the firstFileOffset correctly after reading the LLVM symbol table.	2004-11-28 03:13:02 +00:00
CodeGen	Fix SingleSource/UnitTests/2004-11-28-GlobalBoolLayout.c, and hopefully	2004-11-28 17:56:47 +00:00
Debugger
ExecutionEngine	Rename Emitter.cpp -> JITEmitter.cpp	2004-11-22 22:00:25 +00:00
Linker	Implement dependent library linking. It is no longer required that -lstdc++	2004-11-25 09:32:08 +00:00
Support	Add bzip2 subdirectory	2004-11-25 19:38:28 +00:00
System	Cast the void* handle data member to HMODULE* to keep the VC++ compiler	2004-11-20 23:30:55 +00:00
Target	Revamp long/ulong comparisons to use a much more efficient sequence (thanks	2004-11-29 05:55:24 +00:00
Transforms	Fix for PR454:	2004-11-28 21:31:15 +00:00
VMCore	Fix test/Regression/CFrontend/2003-11-01-EmptyStructCrash.c	2004-11-22 19:15:27 +00:00
Makefile	Add the Linker library	2004-11-14 21:54:41 +00:00