Bill Wendling 22f3b9faac When the visitSub method was split into visitSub and visitFSub, this xform was ... added to the FSub version. However, the original version of this xform guarded against doing this for floating point (!Op0->getType()->isFPOrFPVector()). This is causing LLVM to perform incorrect xforms for code like: void func(double *rhi, double *rlo, double xh, double xl, double yh, double yl){ double mh, ml; double c = 134217729.0; double up, u1, u2, vp, v1, v2; up = xh*c; u1 = (xh - up) + up; u2 = xh - u1; vp = yh*c; v1 = (yh - vp) + vp; v2 = yh - v1; mh = xh*yh; ml = (((u1*v1 - mh) + (u1*v2)) + (u2*v1)) + (u2*v2); ml += xh*yl + xl*yh; *rhi = mh + ml; *rlo = (mh - (*rhi)) + ml; } The last line was optimized away, but rl is intended to be the difference between the infinitely precise result of mh + ml and after it has been rounded to double precision. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@93369 91177308-0d34-0410-b5e6-96231b3b80d8		2010-01-13 23:23:17 +00:00
..
Analysis
Archive
AsmParser
Bitcode	Fix comment typo	2010-01-13 21:25:04 +00:00
CodeGen	Commit some changes I had managed to lose last night while refactoring the code. Avoid change use of PHI instructions because it's not legal to insert any instructions before them.	2010-01-13 19:16:39 +00:00
CompilerDriver
ExecutionEngine
Linker
MC	tidy	2010-01-13 21:21:29 +00:00
Support	Introduce Twine::toStringRef, a variant of toVector which avoids the copy if the	2010-01-13 12:45:23 +00:00
System
Target	fix ELF section mangling stuff for weak symbols to not use	2010-01-13 21:29:21 +00:00
Transforms	When the visitSub method was split into visitSub and visitFSub, this xform was	2010-01-13 23:23:17 +00:00
VMCore	Introduce Twine::toStringRef, a variant of toVector which avoids the copy if the	2010-01-13 12:45:23 +00:00
Makefile