On Tue, Aug 2, 2011 at 10:48 AM, Mikael Pettersson <mi...@it.uu.se> wrote: > Hans-Peter Nilsson writes: > > On Mon, 1 Aug 2011, Richard Henderson wrote: > > > > > On 08/01/2011 01:30 PM, Michael Walle wrote: > > > > 1) function inlining > > > > 2) deferred argument evaluation > > > > 3) because our target has no barrel shifter, (arg >> 10) is emitted > as a > > > > function call to libgcc's __ashrsi3 (_in place_!) > > > > 4) BAM! dead code elimination optimizes r8 assignment away because > calli > > > > may clobber r1-r10 (callee saved registers on lm32). > > > > > > I'm afraid the only solution I can think of is to force F1 out-of-line. > > > > Or another temporary - but the parameter should already have > > that effect. > > It should, but doesn't. See PR48863 for similar breakage on ARM.
On GIMPLE we don't see either the libcall nor those "dependencies". Don't use register vars. Richard. > /Mikael >
