Dan Gohman e3d920699c Re-enable elimination of unnecessary SUBREG_TO_REG instructions in ...

LowerSubregs, and fix an x86-64 isel bug that this exposed.

SUBREG_TO_REG for x86-64 implicit zero extension is only safe for
isel to generate when the source is known to always have zeros in
the high 32 bits. The EXTRACT_SUBREG instruction does not clear
the high 32 bits.


git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@54444 91177308-0d34-0410-b5e6-96231b3b80d8

2008-08-07 02:54:50 +00:00

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Alpha

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ARM

This check is unnecessary, and getting rid of it removes a use of -disable-correct-folding.

2008-08-05 17:52:54 +00:00

CBackend

In the CBackend, use casts to force integer add, subtract, and

2008-07-18 18:43:12 +00:00

CellSPU

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CPP

Put CPPBackend tests into their own directory and run them only if they're

2008-07-10 22:35:32 +00:00

Generic

Fix SDISel lowering of zeroinitializer and undef to use ComputeValueVTs.

2008-08-04 23:30:41 +00:00

IA64

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PowerPC

Fix a catastrophic PPC64 ABI bug: i32 operands which are passed in memory (all of the parameter registers are used) are loaded from sp offsets that were off by 4.

2008-07-24 08:17:07 +00:00

SPARC

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X86

Re-enable elimination of unnecessary SUBREG_TO_REG instructions in

2008-08-07 02:54:50 +00:00