llvm-6502

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History

Jakob Stoklund Olesen d36f5af224 Set correct <def,undef> flags when lowering REG_SEQUENCE.

A REG_SEQUENCE instruction is lowered into a sequence of partial defs:

  %vreg7:ssub_0<def,undef> = COPY %vreg20:ssub_0
  %vreg7:ssub_1<def> = COPY %vreg2
  %vreg7:ssub_2<def> = COPY %vreg2
  %vreg7:ssub_3<def> = COPY %vreg2

The first def needs an <undef> flag to indicate it is the beginning of
the live range, while the other defs are read-modify-write.  Previously,
we depended on LiveIntervalAnalysis to notice and fix the missing
<def,undef>, but that solution was never robust, it was causing problems
with ProcessImplicitDefs and the lowering of chained REG_SEQUENCE
instructions.

This fixes PR11841.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@148879 91177308-0d34-0410-b5e6-96231b3b80d8

2012-01-24 23:28:42 +00:00

Analysis

teach valuetracking about ConstantDataSequential

2012-01-24 07:54:10 +00:00

Archive

Avoid using an invalidated iterator.

2012-01-23 05:07:16 +00:00

AsmParser

More dead code removal (using -Wunreachable-code)

2012-01-20 21:51:11 +00:00

Bitcode

Extend Attributes to 64 bits