diff options
| author | Misha Brukman <brukman+llvm@gmail.com> | 2004-07-26 16:23:55 +0000 |
|---|---|---|
| committer | Misha Brukman <brukman+llvm@gmail.com> | 2004-07-26 16:23:55 +0000 |
| commit | bb966a4a592091b7206027a1090c92ad52f0f3e8 (patch) | |
| tree | fb9c16b37babef662eb0a3ed3e31539b2ce02275 | |
| parent | 3c616b45e7f843c64426da74076e6d9e31f4c904 (diff) | |
More notes on bugs, unimplemented features, and suggested code improvements.
Written by Nate Begeman.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@15235 91177308-0d34-0410-b5e6-96231b3b80d8
| -rw-r--r-- | lib/Target/PowerPC/README.txt | 33 |
1 files changed, 19 insertions, 14 deletions
diff --git a/lib/Target/PowerPC/README.txt b/lib/Target/PowerPC/README.txt index 255a68c4ae..3d78d7fe84 100644 --- a/lib/Target/PowerPC/README.txt +++ b/lib/Target/PowerPC/README.txt @@ -1,12 +1,25 @@ Currently unimplemented: * cast fp to bool -* signed right shift +* signed right shift of long by reg Current bugs: -* use of a cByte/cShort by setCC not first truncated or sign extended - (uByte r3 = 250, r3 + 100; setlt r3, 200 will get wrong result). * conditional branches assume target is within 32k bytes -* large fixed-size allocas not correct +* large fixed-size allocas not correct, although should + be closer to working. Added code in PPCRegisterInfo.cpp + to do >16bit subtractions to the stack pointer. + +Codegen improvements needed: +* we unconditionally emit save/restore of LR even if we don't use it +* no alias analysis causes us to generate slow code for Shootout/matrix +* setCondInst needs to know branchless versions of seteq/setne/etc +* cast elimination pass (uint -> sbyte -> short, kill the byte -> short) + +Current hacks: +* lazy insert of GlobalBaseReg definition at front of first MBB + A prime candidate for sabre's "slightly above ISel" passes. +* cast code is huge, unwieldy. Should probably be broken up into + smaller pieces. +* visitLoadInst is getting awfully cluttered as well. Currently failing tests: * Regression @@ -14,13 +27,9 @@ Currently failing tests: `- Benchmarks | `- Shootout-C++ : most programs fail, miscompilations `- UnitTests - | `- 2002-05-02-CastTest - | `- 2003-05-07-VarArgs | `- 2003-05-26-Shorts | `- 2003-07-09-LoadShorts - | `- 2003-07-09-SignedArgs - | `- 2003-08-11-VaListArg - | `- 2003-05-22-VarSizeArray + | `- 2004-06-20-StaticBitfieldInt `- C++Catch `- SimpleC++Test `- ConditionalExpr @@ -34,8 +43,4 @@ Currently failing tests: | `- hbd: miscompilation | `- d (make_dparser): miscompilation `- Benchmarks - `- McCat/12-IOtest: miscompilation - `- Ptrdist/bc: branch target too far - `- FreeBench/pifft - `- MallocBench/espresso: same as bc - `- MallocBench/make: same as bc + `- MallocBench/make: branch target too far |