[llvm] r241611 - Add a pattern for a nvcast from v2f64 -> v4f32

[Quentin Colombet]

Still, I like when we check we generate something correct :).

Q.
> On Jul 7, 2015, at 11:46 AM, Arnold Schwaighofer <aschwaighofer at apple.com> wrote:
> 
> It was crashing before.
> 
>> On Jul 7, 2015, at 11:46 AM, Quentin Colombet <qcolombet at apple.com> wrote:
>> 
>> Hi Arnold,
>> 
>> The test case is missing some CHECK lines.
>> 
>> Cheers,
>> Q.
>>> On Jul 7, 2015, at 11:31 AM, Arnold Schwaighofer <aschwaighofer at apple.com> wrote:
>>> 
>>> Author: arnolds
>>> Date: Tue Jul  7 13:31:55 2015
>>> New Revision: 241611
>>> 
>>> URL: http://llvm.org/viewvc/llvm-project?rev=241611&view=rev
>>> Log:
>>> Add a pattern for a nvcast from v2f64 -> v4f32
>>> 
>>> Since the NvCast is generated by the selection process the concerns about
>>> endianess and bit reversal don't apply.
>>> 
>>> rdar://21703486
>>> 
>>> Added:
>>>  llvm/trunk/test/CodeGen/AArch64/arm64-nvcast.ll
>>> Modified:
>>>  llvm/trunk/lib/Target/AArch64/AArch64InstrInfo.td
>>> 
>>> Modified: llvm/trunk/lib/Target/AArch64/AArch64InstrInfo.td
>>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/lib/Target/AArch64/AArch64InstrInfo.td?rev=241611&r1=241610&r2=241611&view=diff
>>> ==============================================================================
>>> --- llvm/trunk/lib/Target/AArch64/AArch64InstrInfo.td (original)
>>> +++ llvm/trunk/lib/Target/AArch64/AArch64InstrInfo.td Tue Jul  7 13:31:55 2015
>>> @@ -5315,6 +5315,7 @@ def : Pat<(v8i16 (AArch64NvCast (v2f64 F
>>> def : Pat<(v4i32 (AArch64NvCast (v2f64 FPR128:$src))), (v4i32 FPR128:$src)>;
>>> def : Pat<(v2i64 (AArch64NvCast (v2f64 FPR128:$src))), (v2i64 FPR128:$src)>;
>>> def : Pat<(v2f64 (AArch64NvCast (v2f64 FPR128:$src))), (v2f64 FPR128:$src)>;
>>> +def : Pat<(v4f32 (AArch64NvCast (v2f64 FPR128:$src))), (v4f32 FPR128:$src)>;
>>> 
>>> let Predicates = [IsLE] in {
>>> def : Pat<(v8i8  (bitconvert GPR64:$Xn)), (COPY_TO_REGCLASS GPR64:$Xn, FPR64)>;
>>> 
>>> Added: llvm/trunk/test/CodeGen/AArch64/arm64-nvcast.ll
>>> URL: http://llvm.org/viewvc/llvm-project/llvm/trunk/test/CodeGen/AArch64/arm64-nvcast.ll?rev=241611&view=auto
>>> ==============================================================================
>>> --- llvm/trunk/test/CodeGen/AArch64/arm64-nvcast.ll (added)
>>> +++ llvm/trunk/test/CodeGen/AArch64/arm64-nvcast.ll Tue Jul  7 13:31:55 2015
>>> @@ -0,0 +1,8 @@
>>> +; RUN: llc < %s -mtriple=arm64-apple-ios
>>> +
>>> +define void @test(float * %p1, i32 %v1) {
>>> +entry:
>>> +  %v2 = extractelement <3 x float> <float 0.000000e+00, float 2.000000e+00, float 0.000000e+00>, i32 %v1
>>> +  store float %v2, float* %p1, align 4
>>> +  ret void
>>> +}
>>> 
>>> 
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>> 
>