Testcase failure: CodeGen/Generic/vector-casts.ll

[ggreif]

Bugzilla Link	3683
Resolution	FIXED
Resolved on	Mar 18, 2009 21:56
Version	trunk
OS	MacOS X

Extended Description

This is a PPC mac mini. Xcode 2.5.

FAIL: /gdm/llvm/test/CodeGen/Generic/vector-casts.ll for #3043
Failed with signal(SIGABRT) at line 1
while running: llvm-as < /gdm/llvm/test/CodeGen/Generic/vector-casts.ll | llc
LegalizeVectorTypes.cpp:686: failed assertion `0 && "Unexpected type action!"'

[llvmbot]

This is because SplitVecRes_UnaryOp does not handle the case
where the input vector is widened.
Reproduce with: llc -march=ppc32 -mcpu=7450 vector-casts.bc

[llvmbot]

The problem is a bad interaction between splitting and widening between type
conversions. The v2i8 can be widen (unprofitable in this case) to v16i8 but
v2f64 can only be split to f64. The current code handles widening conversions
to avoid this case but not splitting the case. I need to update the splitting
code to support this case for type conversions.

[llvmbot]

Added support to unary op to split a widen vector by extracting the valid part of the widen vector and do the split. Fixed in r67175.