Vendor import of llvm trunk r126079:

http://llvm.org/svn/llvm-project/llvm/trunk@126079

1 files changed, 26 insertions, 0 deletions

diff --git a/lib/Target/MBlaze/TODO b/lib/Target/MBlaze/TODO
new file mode 100644
index 0000000..2e613eb
--- /dev/null
+++ b/lib/Target/MBlaze/TODO
@@ -0,0 +1,26 @@
+* Writing out ELF files is close to working but the following needs to
+  be examined more closely:
+    - Relocations use 2-byte / 4-byte to terminology in reference to
+      the size of the immediate value being changed. The Xilinx
+      terminology seems to be (???) 4-byte / 8-byte in reference
+      to the number of bytes of instructions that are being changed.
+
+* Code generation seems to work relatively well now but the following
+  needs to be examined more closely:
+    - The stack layout needs to be examined to make sure it meets
+      the standard, especially in regards to var arg functions.
+    - The processor itineraries are copied from a different backend
+      and need to be updated to model the MicroBlaze correctly.
+    - Look at the MBlazeGenFastISel.inc stuff and make use of it
+      if appropriate.
+
+* A basic assembly parser is present now and seems to parse most things.
+  There are a few things that need to be looked at:
+    - There are some instructions that are not generated by the backend
+      and have not been tested as far as the parser is concerned.
+    - The assembly parser does not use any MicroBlaze specific directives.
+      I should investigate if there are MicroBlaze specific directive and,
+      if there are, add them.
+    - The instruction MFS and MTS use special names for some of the
+      special registers that can be accessed. These special register
+      names should be parsed by the assembly parser.