From f18134a1ae4cc8e064c3a30ece4d23a5ec75286a Mon Sep 17 00:00:00 2001 From: Evan Cheng Date: Sun, 8 Feb 2009 08:00:36 +0000 Subject: [PATCH] r64073 commit message is lost. Here it is: Right now if the coalesced copy def is dead and its src is a kill, and that there are now other uses within the live range, the coalescer would mark the def of the source register as dead. But it should also check if there are other kills which means the value has other uses not in the live range. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@64075 91177308-0d34-0410-b5e6-96231b3b80d8 --- lib/CodeGen/SimpleRegisterCoalescing.cpp | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) diff --git a/lib/CodeGen/SimpleRegisterCoalescing.cpp b/lib/CodeGen/SimpleRegisterCoalescing.cpp index 75389a412a0..a7d5d0075d2 100644 --- a/lib/CodeGen/SimpleRegisterCoalescing.cpp +++ b/lib/CodeGen/SimpleRegisterCoalescing.cpp @@ -867,11 +867,12 @@ SimpleRegisterCoalescing::ShortenDeadCopySrcLiveRange(LiveInterval &li, if (LR->valno->def == RemoveStart) { // If the def MI defines the val# and this copy is the only kill of the // val#, then propagate the dead marker. - if (li.isOnlyKill(LR->valno, RemoveEnd)) { + if (!li.isOnlyKill(LR->valno, RemoveEnd)) + li.removeKill(LR->valno, RemoveEnd); + else { PropagateDeadness(li, CopyMI, RemoveStart, li_, tri_); ++numDeadValNo; - } else - li.removeKill(LR->valno, RemoveEnd); + } } removeRange(li, RemoveStart, LR->end, li_, tri_); -- 2.34.1