[PATCH] D37017: [DAGCombiner] fold assertzexts separated by trunc
Eli Friedman via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Wed Sep 13 15:42:34 PDT 2017
efriedma added a subscriber: hans.
efriedma added inline comments.
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Comment at: test/CodeGen/X86/negate-i1.ll:134
+; X64-NEXT: negq %rdi
+; X64-NEXT: movq %rdi, %rax
; X64-NEXT: retq
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This seems kind of scary... is an "i1 zeroext" actually guaranteed to be zero-extended to 64 bits?
https://reviews.llvm.org/D37017
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