[llvm] bdd82d5 - [GlobalISel] Convert unary propagate_undef_any_op opcodes to use new match syntax. NFC. (#119475)

[via llvm-commits]

Author: Amara Emerson
Date: 2024-12-10T16:47:59-08:00
New Revision: bdd82d51563717f2d8e6662ab075856b52330971

URL: https://github.com/llvm/llvm-project/commit/bdd82d51563717f2d8e6662ab075856b52330971
DIFF: https://github.com/llvm/llvm-project/commit/bdd82d51563717f2d8e6662ab075856b52330971.diff

LOG: [GlobalISel] Convert unary propagate_undef_any_op opcodes to use new match syntax. NFC. (#119475)

Added: 
    

Modified: 
    llvm/include/llvm/Target/GlobalISel/Combine.td

Removed: 
    


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diff  --git a/llvm/include/llvm/Target/GlobalISel/Combine.td b/llvm/include/llvm/Target/GlobalISel/Combine.td
index ec6b16b70a96cd..013c3a6ed83d8b 100644
--- a/llvm/include/llvm/Target/GlobalISel/Combine.td
+++ b/llvm/include/llvm/Target/GlobalISel/Combine.td
@@ -424,11 +424,22 @@ def unary_undef_to_zero: GICombineRule<
          [{ return Helper.matchOperandIsUndef(*${root}, 1); }]),
   (apply [{ Helper.replaceInstWithConstant(*${root}, 0); }])>;
 
+def unary_undef_to_undef_frags : GICombinePatFrag<
+  (outs root:$dst), (ins),
+  !foreach(op,
+           [G_TRUNC, G_BITCAST, G_ANYEXT, G_PTRTOINT, G_INTTOPTR, G_FPTOSI,
+            G_FPTOUI],
+           (pattern (op $dst, $x), (G_IMPLICIT_DEF $x)))>;
+def unary_undef_to_undef : GICombineRule<
+  (defs root:$dst),
+  (match (unary_undef_to_undef_frags $dst)),
+  (apply [{ Helper.replaceInstWithUndef(*${dst}.getParent()); }])>;
+
 // Instructions where if any source operand is undef, the instruction can be
 // replaced with undef.
 def propagate_undef_any_op: GICombineRule<
   (defs root:$root),
-  (match (wip_match_opcode G_ADD, G_FPTOSI, G_FPTOUI, G_SUB, G_XOR, G_TRUNC, G_BITCAST, G_ANYEXT, G_PTRTOINT, G_INTTOPTR):$root,
+  (match (wip_match_opcode G_ADD, G_SUB, G_XOR):$root,
          [{ return Helper.matchAnyExplicitUseIsUndef(*${root}); }]),
   (apply [{ Helper.replaceInstWithUndef(*${root}); }])>;
 
@@ -1919,6 +1930,7 @@ def undef_combines : GICombineGroup<[undef_to_fp_zero, undef_to_int_zero,
                                      binop_left_undef_to_zero,
                                      binop_right_undef_to_undef,
                                      unary_undef_to_zero,
+                                     unary_undef_to_undef,
                                      propagate_undef_any_op,
                                      propagate_undef_all_ops,
                                      propagate_undef_shuffle_mask,