llvm-project

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Jingyue Wu 8cb6b2a292 Simplify n-ary adds by reassociation

Summary:
This transformation reassociates a n-ary add so that the add can partially reuse
existing instructions. For example, this pass can simplify

  void foo(int a, int b) {
    bar(a + b);
    bar((a + 2) + b);
  }

to

  void foo(int a, int b) {
    int t = a + b;
    bar(t);
    bar(t + 2);
  }

saving one add instruction.

Fixes PR22357 (https://llvm.org/bugs/show_bug.cgi?id=22357).

Test Plan: nary-add.ll

Reviewers: broune, dberlin, hfinkel, meheff, sanjoy, atrick

Reviewed By: sanjoy, atrick

Subscribers: llvm-commits

Differential Revision: http://reviews.llvm.org/D8950

llvm-svn: 234855

2015-04-14 04:59:22 +00:00

Hello

[CMake] Add LLVM_LINK_COMPONENTS to loadable modules, LLVMHello and BugpointPasses, on Win32.

2014-07-13 13:36:48 +00:00

InstCombine

GCC complains thusly: "attributes at the beginning of statement are ignored [-Werror=attributes]". Very well then! NFC

2015-04-13 20:03:08 +00:00

Instrumentation

DebugInfo: Gut DISubprogram and DILexicalBlock*

2015-04-14 03:40:37 +00:00

IPO

DebugInfo: Update signature of DICompileUnit::replace*()