diff options
Diffstat (limited to 'lib/Target/README.txt')
| -rw-r--r-- | lib/Target/README.txt | 15 |
1 files changed, 0 insertions, 15 deletions
diff --git a/lib/Target/README.txt b/lib/Target/README.txt index dfa00b8c95..194a19219c 100644 --- a/lib/Target/README.txt +++ b/lib/Target/README.txt @@ -1627,21 +1627,6 @@ int bar() { return foo("abcd"); } //===---------------------------------------------------------------------===// -InstCombine should use SimplifyDemandedBits to remove the or instruction: - -define i1 @test(i8 %x, i8 %y) { - %A = or i8 %x, 1 - %B = icmp ugt i8 %A, 3 - ret i1 %B -} - -Currently instcombine calls SimplifyDemandedBits with either all bits or just -the sign bit, if the comparison is obviously a sign test. In this case, we only -need all but the bottom two bits from %A, and if we gave that mask to SDB it -would delete the or instruction for us. - -//===---------------------------------------------------------------------===// - functionattrs doesn't know much about memcpy/memset. This function should be marked readnone rather than readonly, since it only twiddles local memory, but functionattrs doesn't handle memset/memcpy/memmove aggressively: |