[PATCH] [AArch64 NEON]Replace fpimm with fpz32 for floating compare with zero.

[Kevin Qin]

Hi Tim and reviewers,

This is a small change to be strict. Just want get pattern safer.

http://llvm-reviews.chandlerc.com/D2349

Files:
  lib/Target/AArch64/AArch64InstrNEON.td

Index: lib/Target/AArch64/AArch64InstrNEON.td
===================================================================
--- lib/Target/AArch64/AArch64InstrNEON.td
+++ lib/Target/AArch64/AArch64InstrNEON.td
@@ -776,21 +776,21 @@
             (outs VPR64:$Rd), (ins VPR64:$Rn, fpz32:$FPImm),
             asmop # "\t$Rd.2s, $Rn.2s, $FPImm",
             [(set (v2i32 VPR64:$Rd),
-               (v2i32 (Neon_cmpz (v2f32 VPR64:$Rn), (f32 fpimm:$FPImm), CC)))],
+               (v2i32 (Neon_cmpz (v2f32 VPR64:$Rn), (f32 fpz32:$FPImm), CC)))],
             NoItinerary>;
 
   def _4S : NeonI_2VMisc<0b1, u, {size, 0b0}, opcode,
             (outs VPR128:$Rd), (ins VPR128:$Rn, fpz32:$FPImm),
             asmop # "\t$Rd.4s, $Rn.4s, $FPImm",
             [(set (v4i32 VPR128:$Rd),
-               (v4i32 (Neon_cmpz (v4f32 VPR128:$Rn), (f32 fpimm:$FPImm), CC)))],
+               (v4i32 (Neon_cmpz (v4f32 VPR128:$Rn), (f32 fpz32:$FPImm), CC)))],
             NoItinerary>;
 
   def _2D : NeonI_2VMisc<0b1, u, {size, 0b1}, opcode,
             (outs VPR128:$Rd), (ins VPR128:$Rn, fpz32:$FPImm),
             asmop # "\t$Rd.2d, $Rn.2d, $FPImm",
             [(set (v2i64 VPR128:$Rd),
-               (v2i64 (Neon_cmpz (v2f64 VPR128:$Rn), (f32 fpimm:$FPImm), CC)))],
+               (v2i64 (Neon_cmpz (v2f64 VPR128:$Rn), (f32 fpz32:$FPImm), CC)))],
             NoItinerary>;
 }
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