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| author | Benjamin Kramer <benny.kra@googlemail.com> | 2012-03-27 22:03:19 +0000 |
|---|---|---|
| committer | Benjamin Kramer <benny.kra@googlemail.com> | 2012-03-27 22:03:19 +0000 |
| commit | f0901459b9366e9ca9fbd44891085a07fe4d8cef (patch) | |
| tree | fa9d55fec79f1f183dfeee4703d272deea10dc1f /llvm/lib | |
| parent | bf70ee97b106d2fff908f7772cb36b6388817800 (diff) | |
| download | bcm5719-llvm-f0901459b9366e9ca9fbd44891085a07fe4d8cef.tar.gz bcm5719-llvm-f0901459b9366e9ca9fbd44891085a07fe4d8cef.zip | |
Add two missed instcombines related to compares with nsw arithmetic.
llvm-svn: 153542
Diffstat (limited to 'llvm/lib')
| -rw-r--r-- | llvm/lib/Target/README.txt | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/llvm/lib/Target/README.txt b/llvm/lib/Target/README.txt index 1f69ffb09c0..2d4925d307a 100644 --- a/llvm/lib/Target/README.txt +++ b/llvm/lib/Target/README.txt @@ -961,6 +961,18 @@ optimized with "clang -emit-llvm-bc | opt -std-compile-opts". //===---------------------------------------------------------------------===// +int g(int x) { return (x - 10) < 0; } +Should combine to "x <= 9" (the sub has nsw). Currently not +optimized with "clang -emit-llvm-bc | opt -std-compile-opts". + +//===---------------------------------------------------------------------===// + +int g(int x) { return (x + 10) < 0; } +Should combine to "x < -10" (the add 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 |
