Chris Lattner 01cdb1b367 By far, one of the most common uses of isnan is to make 'isunordered' ... comparisons. In an 'isunordered' predicate, which looks like this at the LLVM level: %a = call bool %llvm.isnan(double %X) %b = call bool %llvm.isnan(double %Y) %COM = or bool %a, %b We used to generate this code: fxch %ST(1) fucomip %ST(0), %ST(0) setp %AL fucomip %ST(0), %ST(0) setp %AH or %AL, %AH With this patch, we generate this code: fucomip %ST(0), %ST(1) fstp %ST(0) setp %AL Which should make alkis happy. Tested as X86/compare_folding.llx:test1 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@14148 91177308-0d34-0410-b5e6-96231b3b80d8		2004-06-11 05:33:49 +00:00
..
Analysis	Don't grab the condition of unconditional branches!	2004-06-08 21:50:30 +00:00
Archive	Use the new FileUtilities.h API for mapping a file into an address	2004-05-28 00:24:41 +00:00
AsmParser	Remove some more dead code resulting from adding setTypeName().	2004-05-28 00:21:06 +00:00
Bytecode	Revert an unneeded interface change to Instruction.h	2004-06-11 03:06:43 +00:00
CodeGen	Fix lowering to work correctly	2004-06-11 02:54:02 +00:00
Debugger	"fix" a nasty race condition	2004-01-14 21:18:03 +00:00
ExecutionEngine	Implement PR315: abort, don't warn, when missing external functions encountered	2004-06-01 21:49:00 +00:00
Linker	Move some functions out of gccld.cpp to GenerateCode.cpp. This allows us	2004-06-02 00:22:24 +00:00
Support	Make all of this functionality work directly on win32. Properly conditionalize	2004-06-07 19:37:24 +00:00
Target	By far, one of the most common uses of isnan is to make 'isunordered'	2004-06-11 05:33:49 +00:00
Transforms	Fix a bug in my checkin from last night that caused miscompilations of	2004-06-10 02:33:20 +00:00
VMCore	Fix lowering to work correctly	2004-06-11 02:54:02 +00:00
Makefile	CBackend is no longer here	2004-02-13 23:29:37 +00:00