Update.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@42922 91177308-0d34-0410-b5e6-96231b3b80d8

diff --git a/lib/Target/X86/README.txt b/lib/Target/X86/README.txt
index 0d4dce32d83e0c069404358b350ed363c875f648..9cb01a78afe073098686665289f36af20305256f 100644 (file)
--- a/lib/Target/X86/README.txt
+++ b/lib/Target/X86/README.txt
@@ -89,6 +89,8 @@ Should we promote i16 to i32 to avoid partial register update stalls?
 
 Leave any_extend as pseudo instruction and hint to register
 allocator. Delay codegen until post register allocation.
+Note. any_extend is now turned into an INSERT_SUBREG. We still need to teach
+the coalescer how to deal with it though.
 
 //===---------------------------------------------------------------------===//
 
@@ -991,24 +993,6 @@ int %test2(int %X) {
 
 //===---------------------------------------------------------------------===//
 
-This:
-#include <xmmintrin.h>
-unsigned test(float f) {
- return _mm_cvtsi128_si32( (__m128i) _mm_set_ss( f ));
-}
-
-Compiles to:
-_test:
-        movss 4(%esp), %xmm0
-        movd %xmm0, %eax
-        ret
-
-it should compile to a move from the stack slot directly into eax.  DAGCombine
-has this xform, but it is currently disabled until the alignment fields of 
-the load/store nodes are trustworthy.
-
-//===---------------------------------------------------------------------===//
-
 Sometimes it is better to codegen subtractions from a constant (e.g. 7-x) with
 a neg instead of a sub instruction.  Consider: