[llvm] GlobalISel needs fdiv 1 / sqrt(x) to rsq combine (PR #78673)
Thorsten Schütt via llvm-commits
llvm-commits at lists.llvm.org
Thu Jan 18 23:39:30 PST 2024
================
@@ -33,6 +33,11 @@ def rcp_sqrt_to_rsq : GICombineRule<
[{ return matchRcpSqrtToRsq(*${rcp}, ${matchinfo}); }]),
(apply [{ Helper.applyBuildFn(*${rcp}, ${matchinfo}); }])>;
+def fdiv_1_by_sqrt_to_rsq : GICombineRule<
+ (defs root:$root, build_fn_matchinfo:$matchinfo),
+ (match (wip_match_opcode G_FSQRT, G_FDIV):$root,
----------------
tschuett wrote:
You can remove the `G_FSQRT`.
https://github.com/llvm/llvm-project/pull/78673
More information about the llvm-commits
mailing list