[llvm-commits] CVS: llvm/lib/Target/README.txt

[Chris Lattner]

Changes in directory llvm/lib/Target:

README.txt updated: 1.30 -> 1.31
---
Log message:

Move a target-independent note out of the X86 readme.


---
Diffs of the changes:  (+12 -0)

 README.txt |   12 ++++++++++++
 1 files changed, 12 insertions(+)


Index: llvm/lib/Target/README.txt
diff -u llvm/lib/Target/README.txt:1.30 llvm/lib/Target/README.txt:1.31
--- llvm/lib/Target/README.txt:1.30	Thu May 18 13:26:13 2006
+++ llvm/lib/Target/README.txt	Fri May 19 15:45:08 2006
@@ -208,3 +208,15 @@
 	movl	%eax, _foo
 
 //===---------------------------------------------------------------------===//
+
+Combine: a = sin(x), b = cos(x) into a,b = sincos(x).
+
+Expand these to calls of sin/cos and stores:
+      double sincos(double x, double *sin, double *cos);
+      float sincosf(float x, float *sin, float *cos);
+      long double sincosl(long double x, long double *sin, long double *cos);
+
+Doing so could allow SROA of the destination pointers.  See also:
+http://gcc.gnu.org/bugzilla/show_bug.cgi?id=17687
+
+//===---------------------------------------------------------------------===//