[llvm-commits] [llvm] r145906 - in /llvm/trunk: lib/Transforms/Scalar/LoopStrengthReduce.cpp test/Transforms/LoopStrengthReduce/2011-12-04-loserreg.ll

[NAKAMURA Takumi]

2011/12/6 Andrew Trick <atrick at apple.com>:
> Author: atrick
> Date: Mon Dec  5 21:13:31 2011
> New Revision: 145906
>
> URL: http://llvm.org/viewvc/llvm-project?rev=145906&view=rev
> Log:
> LSR: prune undesirable formulae early.
>
> It's always good to prune early, but formulae that are unsatisfactory
> in their own right need to be removed before running any other pruning
> heuristics. We easily avoid generating such formulae, but we need them
> as an intermediate basis for forming other good formulae.

> Added: llvm/trunk/test/Transforms/LoopStrengthReduce/2011-12-04-loserreg.ll
> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/Transforms/LoopStrengthReduce/2011-12-04-loserreg.ll?rev=145906&view=auto

> +; RUN: llc < %s | FileCheck %s
> +;
> +; Test LSR's ability to prune formulae that refer to nonexistant
> +; AddRecs in other loops.
> +;
> +; Unable to reduce this case further because it requires LSR to exceed
> +; ComplexityLimit.
> +;
> +; We really just want to ensure that LSR can process this loop without
> +; finding an unsatisfactory solution and bailing out. I've added
> +; dummyout, an obvious candidate for postinc replacement so we can
> +; verify that LSR removes it.
> +
> +target datalayout = "e-p:64:64:64-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:64:64-f32:32:32-f64:64:64-v64:64:64-v128:128:128-a0:0:64-s0:64:64-f80:128:128-n8:16:32:64-S128"
> +target triple = "x86_64-apple-darwin"

Andy, this depends on TARGETS=x86.

Please be patient even if you felt I got spamming ;) Good night!

...Takumi