Two improvements:

1. Codegen this comparison:
     if (X == 0x8000)

as:

        cmplwi cr0, r3, 32768
        bne cr0, LBB1_2 ;cond_next

instead of:

        lis r2, 0
        ori r2, r2, 32768
        cmpw cr0, r3, r2
        bne cr0, LBB1_2 ;cond_next


2. Codegen this comparison:
      if (X == 0x12345678)

as:

        xoris r2, r3, 4660
        cmplwi cr0, r2, 22136
        bne cr0, LBB1_2 ;cond_next

instead of:

        lis r2, 4660
        ori r2, r2, 22136
        cmpw cr0, r3, r2
        bne cr0, LBB1_2 ;cond_next


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@30509 91177308-0d34-0410-b5e6-96231b3b80d8

1 files changed, 0 insertions, 21 deletions

diff --git a/lib/Target/PowerPC/README.txt b/lib/Target/PowerPC/README.txt
index cfc7eb38b2..4f7f2cff10 100644
--- a/lib/Target/PowerPC/README.txt
+++ b/lib/Target/PowerPC/README.txt
@@ -50,27 +50,6 @@ we don't have to always run the branch selector for small functions.
 
 ===-------------------------------------------------------------------------===
 
-* Codegen this:
-
-   void test2(int X) {
-     if (X == 0x12345678) bar();
-   }
-
-    as:
-
-       xoris r0,r3,0x1234
-       cmplwi cr0,r0,0x5678
-       beq cr0,L6
-
-    not:
-
-        lis r2, 4660
-        ori r2, r2, 22136 
-        cmpw cr0, r3, r2  
-        bne .LBB_test2_2
-
-===-------------------------------------------------------------------------===
-
 Lump the constant pool for each function into ONE pic object, and reference
 pieces of it as offsets from the start.  For functions like this (contrived
 to have lots of constants obviously):