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

[Arnold Schwaighofer]

:)

r241619


> On Jul 7, 2015, at 11:47 AM, Quentin Colombet <qcolombet at apple.com> wrote:
> 
> 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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>>> 
>> 
>