[llvm-commits] CVS: llvm/lib/Target/X86/README.txt

[Evan Cheng]

Changes in directory llvm/lib/Target/X86:

README.txt updated: 1.60 -> 1.61
---
Log message:

Updates.

---
Diffs of the changes:  (+3 -20)

 README.txt |   23 +++--------------------
 1 files changed, 3 insertions(+), 20 deletions(-)


Index: llvm/lib/Target/X86/README.txt
diff -u llvm/lib/Target/X86/README.txt:1.60 llvm/lib/Target/X86/README.txt:1.61
--- llvm/lib/Target/X86/README.txt:1.60	Wed Feb 22 23:17:43 2006
+++ llvm/lib/Target/X86/README.txt	Sat Feb 25 04:04:07 2006
@@ -157,6 +157,7 @@
 
 Use push/pop instructions in prolog/epilog sequences instead of stores off 
 ESP (certain code size win, perf win on some [which?] processors).
+Also, it appears icc use push for parameter passing. Need to investigate.
 
 //===---------------------------------------------------------------------===//
 
@@ -411,22 +412,6 @@
 
 //===---------------------------------------------------------------------===//
 
-Easy: Global addresses are not always allowed as immediates.  For this:
-
-int dst = 0; int *ptr = 0;
-void foo() { ptr = &dst; }
-
-we get this:
-
-_foo:
-        movl $_dst, %eax
-        movl %eax, _ptr
-        ret
-
-When: "movl $_dst, _ptr" is sufficient.
-
-//===---------------------------------------------------------------------===//
-
 Instead of the following for memset char*, 1, 10:
 
 	movl $16843009, 4(%edx)
@@ -505,10 +490,6 @@
 
 //===---------------------------------------------------------------------===//
 
-Select (add, x, GlobalAddress) to ADD32ri, etc. when it's appropriate.
-
-//===---------------------------------------------------------------------===//
-
 The first BB of this code:
 
 declare bool %foo()
@@ -533,4 +514,6 @@
 
 It would be better to emit "cmp %al, 1" than a xor and test.
 
+//===---------------------------------------------------------------------===//
 
+Enable X86InstrInfo::convertToThreeAddress().