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On Aug 15, 2010, at 5:12 PM, Silvio Ricardo Cordeiro wrote: > Is there a way for me to collect statistics about the number of loads/stores added by the "linearscan" register allocator (just like can be done with the "local" allocator)? I still haven't grokked very well the interaction between RALinScan and Spiller... Should I add those two statistics to the

Hi, Is there a way for me to collect statistics about the number of loads/stores added by the "linearscan" register allocator (just like can be done with the "local" allocator)? I still haven't grokked very well the interaction between RALinScan and Spiller... Should I add those two statistics to the spiller's class? Thanks, -- Silvio Ricardo Cordeiro --------------

...l* and *linearscan* allocators (I'm using LLVM 2.7). For *local*, I get a Load/Store count of 314/367. But when I use *linearscan*, the counters at VirtRegRewriter.cpp end up being 0/0. I've also tried to compile a couple other source files, and VirtRegRewriter.cpp always has NumLoads=0 and NumStores=0 in the end. I can't believe linearscan is *that *good! I've tried to add other variables to the source code, but it seems to be spiling them without updating NumLoads/NumStores... Is there a source file that's commonly used to test this kind of thing? We are working on simplifying...

On 25 Aug 2010, at 02:04, Silvio Ricardo Cordeiro wrote: > On Sun, Aug 15, 2010 at 10:04 PM, Jakob Stoklund Olesen <stoklund at 2pi.dk> wrote: > > On Aug 15, 2010, at 5:12 PM, Silvio Ricardo Cordeiro wrote: > > > Is there a way for me to collect statistics about the number of loads/stores added by the "linearscan" register allocator (just like can be done with

...register, and reload it. And this comment says that it can't have been folded, so the first comment seems to be superfluous. PhysReg = getReg(MBB, MI, VirtReg); } --- svn.llvm.orig/lib/CodeGen/RegAllocLocal.cpp +++ svn.llvm/lib/CodeGen/RegAllocLocal.cpp @@ -35,7 +35,6 @@ STATISTIC(NumStores, "Number of stores added"); STATISTIC(NumLoads , "Number of loads added"); -STATISTIC(NumFolded, "Number of loads/stores folded into instructions"); namespace { static RegisterRegAlloc @@ -500,12 +499,7 @@ if (PhysReg) { // Register is available, allocate it...

In the following example with gcc style builtins, in once case llvm.powi.f64 is emitted and in the other just a call to library function powf. ~/llvm/build/Debug+Asserts/bin/clang -S -emit-llvm pow1.c Why is that? Is there a way to force the call to an llvm style builtin? Tia. Reed -------------- next part -------------- A non-text attachment was scrubbed... Name: pow1.c Type: text/x-csrc