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Diffstat (limited to 'llvm/lib/Target/README.txt')
| -rw-r--r-- | llvm/lib/Target/README.txt | 38 |
1 files changed, 0 insertions, 38 deletions
diff --git a/llvm/lib/Target/README.txt b/llvm/lib/Target/README.txt index 52a334a6174..282d9234c1a 100644 --- a/llvm/lib/Target/README.txt +++ b/llvm/lib/Target/README.txt @@ -1844,44 +1844,6 @@ we remove checking in code like //===---------------------------------------------------------------------===// -This code (from Benchmarks/Dhrystone/dry.c): - -define i32 @Func1(i32, i32) nounwind readnone optsize ssp { -entry: - %sext = shl i32 %0, 24 - %conv = ashr i32 %sext, 24 - %sext6 = shl i32 %1, 24 - %conv4 = ashr i32 %sext6, 24 - %cmp = icmp eq i32 %conv, %conv4 - %. = select i1 %cmp, i32 10000, i32 0 - ret i32 %. -} - -Should be simplified into something like: - -define i32 @Func1(i32, i32) nounwind readnone optsize ssp { -entry: - %sext = shl i32 %0, 24 - %conv = and i32 %sext, 0xFF000000 - %sext6 = shl i32 %1, 24 - %conv4 = and i32 %sext6, 0xFF000000 - %cmp = icmp eq i32 %conv, %conv4 - %. = select i1 %cmp, i32 10000, i32 0 - ret i32 %. -} - -and then to: - -define i32 @Func1(i32, i32) nounwind readnone optsize ssp { -entry: - %conv = and i32 %0, 0xFF - %conv4 = and i32 %1, 0xFF - %cmp = icmp eq i32 %conv, %conv4 - %. = select i1 %cmp, i32 10000, i32 0 - ret i32 %. -} -//===---------------------------------------------------------------------===// - clang -O3 currently compiles this code int g(unsigned int a) { |
