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

[Chris Lattner]

Changes in directory llvm/lib/Target/PowerPC:

README.txt updated: 1.50 -> 1.51
---
Log message:

another testcase.


---
Diffs of the changes:  (+17 -0)

 README.txt |   17 +++++++++++++++++
 1 files changed, 17 insertions(+)


Index: llvm/lib/Target/PowerPC/README.txt
diff -u llvm/lib/Target/PowerPC/README.txt:1.50 llvm/lib/Target/PowerPC/README.txt:1.51
--- llvm/lib/Target/PowerPC/README.txt:1.50	Tue Jan 31 01:16:34 2006
+++ llvm/lib/Target/PowerPC/README.txt	Tue Jan 31 18:28:12 2006
@@ -460,3 +460,20 @@
 This could be done in the dag combiner, by swapping a BR_CC when a SETCC of the
 same operands (but backwards) exists.  In this case, this wouldn't save us 
 anything though, because the compares still wouldn't be shared.
+
+===-------------------------------------------------------------------------===
+
+A simple case we generate suboptimal code on:
+
+int test(int X) {
+  return X == 0 ? 32 : 0;
+}
+
+_test:
+        cntlzw r2, r3
+        srwi r2, r2, 5
+        slwi r3, r2, 5
+        blr
+
+The shifts should be one 'andi'.
+