X-Git-Url: http://demsky.eecs.uci.edu/git/?a=blobdiff_plain;f=lib%2FTarget%2FSparc%2FREADME.txt;h=b4991fe5790b705e6dfa5a8e4bfc5aa351ded1ea;hb=09aa3f0ef35d9241c92439d74b8d5e9a81d814c2;hp=90fab7490badaec252d9a0f99d197780dc74d2b7;hpb=326f378a8fb9e81bf41804a5a66bfdb5f76b67f3;p=oota-llvm.git

diff --git a/lib/Target/Sparc/README.txt b/lib/Target/Sparc/README.txt
index 90fab7490ba..b4991fe5790 100644
--- a/lib/Target/Sparc/README.txt
+++ b/lib/Target/Sparc/README.txt
@@ -1,42 +1,59 @@
 
-SparcV8 backend skeleton
-------------------------
-
-This directory houses a 32-bit SPARC V8 backend employing an expander-based
-instruction selector.  It is not yet functionally complete.  Watch
-this space for more news coming soon!
-
-Current expected test failures
-------------------------------
-
-Here are the currently-expected SingleSource failures for V8
-(Some C++ programs are crashing in libstdc++ at the moment;
-I'm not sure why.)
-
-  (llc) SingleSource/Regression/C++/EH/exception_spec_test
-  (llc) SingleSource/Regression/C++/EH/throw_rethrow_test
-
-Here are the currently-expected MultiSource failures for V8,
-neglecting FreeBench, MallocBench, and Prolangs-C++:
-
-  (llc,cbe) MultiSource/Applications/d/make_dparser
-  (llc,cbe) MultiSource/Applications/hexxagon
-  (llc) MultiSource/Benchmarks/Fhourstones
-  (llc,cbe) MultiSource/Benchmarks/McCat/03-testtrie
-  (llc) MultiSource/Benchmarks/McCat/18-imp
-  (llc,cbe) MultiSource/Benchmarks/Prolangs-C/bison/mybison
-  (llc,cbe) MultiSource/Benchmarks/Prolangs-C/fixoutput
-  (llc,cbe) MultiSource/Benchmarks/Prolangs-C/gnugo
-  (llc,cbe) MultiSource/Benchmarks/Prolangs-C/plot2fig
-  (llc,cbe) MultiSource/Benchmarks/Ptrdist/anagram
-
 To-do
 -----
 
-* support shifts on longs
-* support casting 64-bit integers to FP types
-* support FP rem
-* directly support select instructions
-
-$Date$
-
+* Keep the address of the constant pool in a register instead of forming its
+  address all of the time.
+* We can fold small constant offsets into the %hi/%lo references to constant
+  pool addresses as well.
+* When in V9 mode, register allocate %icc[0-3].
+* Add support for isel'ing UMUL_LOHI instead of marking it as Expand.
+* Emit the 'Branch on Integer Register with Prediction' instructions.  It's
+  not clear how to write a pattern for this though:
+
+float %t1(int %a, int* %p) {
+        %C = seteq int %a, 0
+        br bool %C, label %T, label %F
+T:
+        store int 123, int* %p
+        br label %F
+F:
+        ret float undef
+}
+
+codegens to this:
+
+t1:
+        save -96, %o6, %o6
+1)      subcc %i0, 0, %l0
+1)      bne .LBBt1_2    ! F
+        nop
+.LBBt1_1:       ! T
+        or %g0, 123, %l0
+        st %l0, [%i1]
+.LBBt1_2:       ! F
+        restore %g0, %g0, %g0
+        retl
+        nop
+
+1) should be replaced with a brz in V9 mode.
+
+* Same as above, but emit conditional move on register zero (p192) in V9 
+  mode.  Testcase:
+
+int %t1(int %a, int %b) {
+        %C = seteq int %a, 0
+        %D = select bool %C, int %a, int %b
+        ret int %D
+}
+
+* Emit MULX/[SU]DIVX instructions in V9 mode instead of fiddling 
+  with the Y register, if they are faster.
+
+* Codegen bswap(load)/store(bswap) -> load/store ASI
+
+* Implement frame pointer elimination, e.g. eliminate save/restore for 
+  leaf fns.
+* Fill delay slots
+
+* Implement JIT support