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Tobias Edler von Koch
cbe2100f7e
Summary: The RegisterScavenger explicitly ignores <kill> flags on operands of predicated instructions and therefore assumes that such registers remain live. When it then scavenges such a register, it inserts a spill of this (killed) register. This is invalid code and gets flagged up by the verifier. Nowadays kill flags are set correctly on predicated instructions. This patch makes the Scavenger respect them. The bug has so far only been triggered by an internal pass, so I don't have a test case unfortunately. Fixes PR23119. Reviewers: hfinkel, tobiasvk_caf Subscribers: llvm-commits Differential Revision: http://reviews.llvm.org/D9039 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@239439 91177308-0d34-0410-b5e6-96231b3b80d8
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