[llvm-commits] [llvm] r124091 - /llvm/trunk/lib/Target/README.txt

[Chris Lattner]

Author: lattner
Date: Sun Jan 23 19:12:18 2011
New Revision: 124091

URL: http://llvm.org/viewvc/llvm-project?rev=124091&view=rev
Log:
with recent work, we now optimize this into:

define i32 @foo(i32 %x) nounwind readnone ssp {
entry:
  %tobool = icmp eq i32 %x, 0
  %tmp5 = select i1 %tobool, i32 2, i32 1
  ret i32 %tmp5
}


Modified:
    llvm/trunk/lib/Target/README.txt

Modified: llvm/trunk/lib/Target/README.txt
URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/README.txt?rev=124091&r1=124090&r2=124091&view=diff
==============================================================================
--- llvm/trunk/lib/Target/README.txt (original)
+++ llvm/trunk/lib/Target/README.txt Sun Jan 23 19:12:18 2011
@@ -1270,26 +1270,6 @@
 
 //===---------------------------------------------------------------------===//
 
-A/B get pinned to the stack because we turn an if/then into a select instead
-of PRE'ing the load/store.  This may be fixable in instcombine:
-http://gcc.gnu.org/bugzilla/show_bug.cgi?id=37892
-
-struct X { int i; };
-int foo (int x) {
-  struct X a;
-  struct X b;
-  struct X *p;
-  a.i = 1;
-  b.i = 2;
-  if (x)
-    p = &a;
-  else
-    p = &b;
-  return p->i;
-}
-
-//===---------------------------------------------------------------------===//
-
 Interesting missed case because of control flow flattening (should be 2 loads):
 http://gcc.gnu.org/bugzilla/show_bug.cgi?id=26629
 With: llvm-gcc t2.c -S -o - -O0 -emit-llvm | llvm-as |