this xform is implemented.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45404 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 22 deletions

diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt
index 46f31164d5..08b5875c57 100644
--- a/lib/Target/X86/README.txt
+++ b/lib/Target/X86/README.txt
@@ -702,28 +702,6 @@ The add\sub pair is really unneeded here.
 
 //===---------------------------------------------------------------------===//
 
-We currently compile sign_extend_inreg into two shifts:
-
-long foo(long X) {
-  return (long)(signed char)X;
-}
-
-becomes:
-
-_foo:
-        movl 4(%esp), %eax
-        shll $24, %eax
-        sarl $24, %eax
-        ret
-
-This could be:
-
-_foo:
-        movsbl  4(%esp),%eax
-        ret
-
-//===---------------------------------------------------------------------===//
-
 Consider the expansion of:
 
 uint %test3(uint %X) {