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| author | Evan Cheng <evan.cheng@apple.com> | 2007-03-29 02:48:56 +0000 |
|---|---|---|
| committer | Evan Cheng <evan.cheng@apple.com> | 2007-03-29 02:48:56 +0000 |
| commit | 974777868cfaaac6655ce00fae8bae0a000dd4a2 (patch) | |
| tree | 66e17de602d98c955fe5fd8d566b8ff99c87f5bf /lib | |
| parent | 01542f3d80b510fedfa6eb3c6c7696a7116d4acd (diff) | |
| download | external_llvm-974777868cfaaac6655ce00fae8bae0a000dd4a2.zip external_llvm-974777868cfaaac6655ce00fae8bae0a000dd4a2.tar.gz external_llvm-974777868cfaaac6655ce00fae8bae0a000dd4a2.tar.bz2 | |
New entries.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@35445 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/CodeGen/README.txt | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/lib/CodeGen/README.txt b/lib/CodeGen/README.txt index cd40895..aa5a54c 100644 --- a/lib/CodeGen/README.txt +++ b/lib/CodeGen/README.txt @@ -65,3 +65,24 @@ Some potential added complexities: 4. As stated in 3, not as simple as cloning in some cases. The target will have to decide how to remat it. For example, an ARM 2-piece constant generation instruction is remat'ed as a load from constantpool. + +//===---------------------------------------------------------------------===// + +bb27 ... + ... + %reg1037 = ADDri %reg1039, 1 + %reg1038 = ADDrs %reg1032, %reg1039, %NOREG, 10 + Successors according to CFG: 0x8b03bf0 (#5) + +bb76 (0x8b03bf0, LLVM BB @0x8b032d0, ID#5): + Predecessors according to CFG: 0x8b0c5f0 (#3) 0x8b0a7c0 (#4) + %reg1039 = PHI %reg1070, mbb<bb76.outer,0x8b0c5f0>, %reg1037, mbb<bb27,0x8b0a7c0> + +Note ADDri is not a two-address instruction. However, its result %reg1037 is an +operand of the PHI node in bb76 and its operand %reg1039 is the result of the +PHI node. We should treat it as a two-address code and make sure the ADDri is +scheduled after any node that reads %reg1039. + +//===---------------------------------------------------------------------===// + +Re-Materialize load from frame index. |