[llvm] [AArch64][GlobalISel] Look through COPY and G_BITCAST while selecting fcvtl2 (fpext) (PR #65463)

[Vladislav Dzhidzhoev via llvm-commits]

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@@ -4739,14 +4739,18 @@ defm FCMLT  : SIMDFPCmpTwoVector<0, 1, 0b01110, "fcmlt", AArch64fcmltz>;
 defm FCVTAS : SIMDTwoVectorFPToInt<0,0,0b11100, "fcvtas",int_aarch64_neon_fcvtas>;
 defm FCVTAU : SIMDTwoVectorFPToInt<1,0,0b11100, "fcvtau",int_aarch64_neon_fcvtau>;
 defm FCVTL  : SIMDFPWidenTwoVector<0, 0, 0b10111, "fcvtl">;
+
+let GIIgnoreCopies = 1 in
+class PatIgnoreCopies<dag pattern, dag result> : Pat<pattern, result>, GISelFlags;
+
 def : Pat<(v4f32 (int_aarch64_neon_vcvthf2fp (v4i16 V64:$Rn))),
           (FCVTLv4i16 V64:$Rn)>;
 def : Pat<(v4f32 (int_aarch64_neon_vcvthf2fp (extract_subvector (v8i16 V128:$Rn),
                                                                 (i64 4)))),
           (FCVTLv8i16 V128:$Rn)>;
 def : Pat<(v2f64 (any_fpextend (v2f32 V64:$Rn))),
           (FCVTLv2i32 V64:$Rn)>;
-def : Pat<(v2f64 (any_fpextend (v2f32 (extract_high_v4f32 (v4f32 V128:$Rn))))),
+def : PatIgnoreCopies<(v2f64 (any_fpextend (v2f32 (extract_high_v4f32 (v4f32 V128:$Rn))))),
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dzhidzhoev wrote:

Sorry, I've mixed it up with another change.

https://github.com/llvm/llvm-project/pull/65463