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

[Quentin Colombet]

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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