[PATCH] D26921: [AArch64LoadStoreOptimizer] Don't treat write to XZR/WZR as a clobber.
Jun Bum Lim via llvm-commits
llvm-commits at lists.llvm.org
Mon Nov 21 10:23:41 PST 2016
junbuml added inline comments.
================
Comment at: test/CodeGen/AArch64/ldst-opt.ll:1559
+
+; Check that write of xzr doesn't inhibit pariing of xzr stores since
+; it isn't actually clobbered.
----------------
typo: pariing
================
Comment at: test/CodeGen/AArch64/ldst-opt.ll:1561
+; it isn't actually clobbered.
+define i1 @no-clobber-zr(i64* %p, i64 %x) nounwind {
+; CHECK-LABEL: no-clobber-zr
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I cannot see difference with/without this patch in this test. It appears that there is no instruction between the two stores.
https://reviews.llvm.org/D26921
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