llvm/lib/Transforms/Scalar/InstructionCombining.cpp · dd0c174082eda6cf40ae58c8218b43b253214e92 · Roger Ferrer / llvm-epi-0.8

"clang/lib/git@repo.hca.bsc.es:rferrer/llvm-epi-0.8.git" did not exist on "9db535035d95849852ad8976e009ae8c0e6f9f33"

Turn sdiv into udiv if both operands have a clear sign bit. This occurs · dd0c1740

Chris Lattner authored Nov 05, 2005

a few times in crafty:

OLD:    %tmp.36 = div int %tmp.35, 8            ; <int> [#uses=1]
NEW:    %tmp.36 = div uint %tmp.35, 8           ; <uint> [#uses=0]
OLD:    %tmp.19 = div int %tmp.18, 8            ; <int> [#uses=1]
NEW:    %tmp.19 = div uint %tmp.18, 8           ; <uint> [#uses=0]
OLD:    %tmp.117 = div int %tmp.116, 8          ; <int> [#uses=1]
NEW:    %tmp.117 = div uint %tmp.116, 8         ; <uint> [#uses=0]
OLD:    %tmp.92 = div int %tmp.91, 8            ; <int> [#uses=1]
NEW:    %tmp.92 = div uint %tmp.91, 8           ; <uint> [#uses=0]

Which all turn into shrs.

llvm-svn: 24190

dd0c1740