Chris Lattner 3a8e675c03 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 llvm-svn: 14148		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
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 the prolog epilog code inserter to match the documentation and support	2004-06-10 06:23:35 +00:00
Debugger
ExecutionEngine	Implement PR315: abort, don't warn, when missing external functions encountered	2004-06-01 21:49:00 +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