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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2012-03-28 10:50:18 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2012-03-28 10:50:18 +0000 |
| commit | 9b58464330f45dcf6fe621a40f4bc8617169586e (patch) | |
| tree | 83181392df10b80e1cc9d1fc6820c275683f3f63 /lib/Target/README.txt | |
| parent | 6e9d66c756a3d3f0d1636a9f1143dedd2f58138b (diff) | |
| download | llvm-9b58464330f45dcf6fe621a40f4bc8617169586e.tar.gz llvm-9b58464330f45dcf6fe621a40f4bc8617169586e.tar.bz2 llvm-9b58464330f45dcf6fe621a40f4bc8617169586e.tar.xz | |
Add another note about a missed compare with nsw arithmetic instcombine.
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@153574 91177308-0d34-0410-b5e6-96231b3b80d8
Diffstat (limited to 'lib/Target/README.txt')
| -rw-r--r-- | lib/Target/README.txt | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/lib/Target/README.txt b/lib/Target/README.txt index 8929ac4f2a..3c21ddae80 100644 --- a/lib/Target/README.txt +++ b/lib/Target/README.txt @@ -973,6 +973,13 @@ optimized with "clang -emit-llvm-bc | opt -std-compile-opts". //===---------------------------------------------------------------------===// +int f(int i, int j) { return i < j + 1; } +int g(int i, int j) { return j > i - 1; } +Should combine to "i <= j" (the add/sub has nsw). Currently not +optimized with "clang -emit-llvm-bc | opt -std-compile-opts". + +//===---------------------------------------------------------------------===// + This was noticed in the entryblock for grokdeclarator in 403.gcc: %tmp = icmp eq i32 %decl_context, 4 |