This has apparently been fixed

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30864 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/Alpha/README.txt b/lib/Target/Alpha/README.txt
index cde7140..7f54cff 100644 (file)
--- a/lib/Target/Alpha/README.txt
+++ b/lib/Target/Alpha/README.txt
@@ -151,33 +151,3 @@ $L8:
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 Fix Ordered/Unordered FP stuff
 
-
-%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
-improve bytezap opertunities
-ulong %foo(ulong %y) {
-entry:
-        %tmp = and ulong %y,  65535
-        %tmp2 = shr ulong %tmp,  ubyte 3
-        ret ulong %tmp2
-}
-
-
-compiles to a 3 instruction sequence without instcombine
-        zapnot $16,3,$0
-        srl $0,3,$0
-        ret $31,($26),1
- 
-After instcombine you get
-ulong %foo(ulong %y) {
-entry:
-        %tmp = shr ulong %y, ubyte 3            ; <ulong> [#uses=1]
-        %tmp2 = and ulong %tmp, 8191            ; <ulong> [#uses=1]
-        ret ulong %tmp2
-}
-
-which compiles to
-        lda $0,8191($31)
-        srl $16,3,$1
-        and $1,$0,$0
-        ret $31,($26),1
-