Changes in directory llvm/lib/Target:
README.txt updated: 1.5 -> 1.6
---
Log message:
new test
---
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:1.5 llvm/lib/Target/README.txt:1.6
--- llvm/lib/Target/README.txt:1.5 Sun Feb 5 02:26:16 2006
+++ llvm/lib/Target/README.txt Wed Feb 15 13:52:06 2006
@@ -64,3 +64,15 @@
//===---------------------------------------------------------------------===//
+DAG combine this into mul A, 8:
+
+int %test(int %A) {
+ %B = mul int %A, 8 ;; shift
+ %C = add int %B, 7 ;; dead, no demanded bits.
+ %D = and int %C, -8 ;; dead once add is gone.
+ ret int %D
+}
+
+This sort of thing occurs in the alloca lowering code and other places that
+are generating alignment of an already aligned value.
+
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