Benjamin Kramer 52a44b9c80 InstCombine: Turn umul_with_overflow into mul nuw if we can prove that it cannot overflow. ...

This happens a lot in clang-compiled C++ code because it adds overflow checks to operator new[]:
  unsigned *foo(unsigned n) { return new unsigned[n]; }
We can optimize away the overflow check on 64 bit targets because (uint64_t)n*4 cannot overflow.

llvm-svn: 127418

2011-03-10 18:40:14 +00:00

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Analysis

When SCEV can determine the loop test is X < X, set ExactBECount=0.

2011-03-09 17:29:58 +00:00

Archive

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Assembler

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Bindings/Ocaml

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Bitcode

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BugPoint

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CodeGen

PTX: Add preliminary support for floating-point divide and multiply-and-add

2011-03-10 16:57:18 +00:00

DebugInfo

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ExecutionEngine

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Feature

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FrontendAda

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FrontendC

Add a RUN line to the test case to make it functional. <rdar://problem/9055247>

2011-03-09 04:02:40 +00:00

FrontendC++

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FrontendFortran

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FrontendObjC

Testcase for r127301.

2011-03-09 01:05:00 +00:00

FrontendObjC++

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Integer

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lib

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Linker

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LLVMC

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MC

LLVM combines the offset mode of A8.6.199 A1 & A2 into STRBT.

2011-03-09 20:01:14 +00:00

Object

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Other

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Scripts

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TableGen

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Transforms

InstCombine: Turn umul_with_overflow into mul nuw if we can prove that it cannot overflow.

2011-03-10 18:40:14 +00:00

Unit

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Verifier

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CMakeLists.txt

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lit.cfg

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lit.site.cfg.in

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Makefile

Reapply r127073(partially): Introduce $(ECHOPATH) to print DOSish path string on MSYS bash for alternative of $(ECHO).

2011-03-08 12:25:10 +00:00

Makefile.tests

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site.exp.in

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TestRunner.sh

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