Changes in directory llvm/lib/Target/PowerPC:
README.txt updated: 1.54 -> 1.55
---
Log message:
new example
---
Diffs of the changes: (+19 -0)
README.txt | 19 +++++++++++++++++++
1 files changed, 19 insertions(+)
Index: llvm/lib/Target/PowerPC/README.txt
diff -u llvm/lib/Target/PowerPC/README.txt:1.54
llvm/lib/Target/PowerPC/README.txt:1.55
--- llvm/lib/Target/PowerPC/README.txt:1.54 Thu Feb 2 01:27:56 2006
+++ llvm/lib/Target/PowerPC/README.txt Thu Feb 2 01:37:11 2006
@@ -448,3 +448,22 @@
blr
noticed in 2005-05-11-Popcount-ffs-fls.c.
+
+
+===-------------------------------------------------------------------------===
+
+We should custom expand setcc instead of pretending that we have it. That
+would allow us to expose the access of the crbit after the mfcr, allowing
+that access to be trivially folded into other ops. A simple example:
+
+int foo(int a, int b) { return (a < b) << 4; }
+
+compiles into:
+
+_foo:
+ cmpw cr7, r3, r4
+ mfcr r2, 1
+ rlwinm r2, r2, 29, 31, 31
+ slwi r3, r2, 4
+ blr
+
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