Jakob Stoklund Olesen 795f951c6d Fix coalescing with IMPLICIT_DEF values. ...

PHIElimination inserts IMPLICIT_DEF instructions to guarantee that all
PHI predecessors have a live-out value. These IMPLICIT_DEF values are
not considered to be real interference when coalescing virtual
registers:

  %vreg1 = IMPLICIT_DEF
  %vreg2 = MOV32r0

When joining %vreg1 and %vreg2, the IMPLICIT_DEF instruction and its
value number should simply be erased since the %vreg2 value number now
provides a live-out value for the PHI predecesor block.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@165813 91177308-0d34-0410-b5e6-96231b3b80d8

2012-10-12 18:03:04 +00:00

..

ARM

Legalizer optimize a pair of div / mod to a call to divrem libcall if they are

2012-10-12 01:15:47 +00:00

CellSPU

Fix broken tests.

2012-10-02 15:49:34 +00:00

CPP

test commit

2012-07-18 17:53:05 +00:00

Generic

BranchProb: modify the definition of an edge in BranchProbabilityInfo to handle

2012-08-24 18:14:27 +00:00

Hexagon

LLVM Bug Fix 13709: Remove needless lsr(Rp, #32) instruction access the

2012-09-05 16:01:40 +00:00

MBlaze

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Mips

Div, Rem int/unsigned int

2012-10-12 02:01:09 +00:00

MSP430

Reapply r161633-161634 "Partition use lists so defs always come before uses.""

2012-08-10 00:21:30 +00:00

NVPTX

Add llvm.fabs intrinsic.

2012-05-28 21:48:37 +00:00

PowerPC

llvm/test/CodeGen/PowerPC/2012-10-12-bitcast.ll: Try to fix failure on non-ppc hosts, to add -mattr=+altivec.

2012-10-12 16:01:08 +00:00

SPARC

Fix broken tests.

2012-10-02 15:49:34 +00:00

Thumb

Fix Thumb2 fixup kind in the integrated-as.

2012-09-01 15:06:36 +00:00

Thumb2

Add LLVM support for Swift.

2012-09-29 21:43:49 +00:00

X86

Fix coalescing with IMPLICIT_DEF values.

2012-10-12 18:03:04 +00:00

XCore

Fix pattern for MKMSK instruction.

2012-06-13 17:59:12 +00:00