Remove unnecessary readme entry

[oota-llvm.git] / lib / Target / X86 / README.txt

diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt
index fcbae96bee01112350bd9497f2b84fed52f64b28..2374659a519a3bd5270cc5eae2d4298cc481ed81 100644 (file)
--- a/lib/Target/X86/README.txt
+++ b/lib/Target/X86/README.txt
@@ -1691,3 +1691,19 @@ LBB1_1:  ## bb.i
   ...
 
 //===---------------------------------------------------------------------===//
+
+We compile:
+
+int test(int x, int y) {
+  return x-y-1;
+}
+
+into (-m64):
+
+_test:
+       decl    %edi
+       movl    %edi, %eax
+       subl    %esi, %eax
+       ret
+
+it would be better to codegen as: x+~y  (notl+addl)