Attachment 132356 Details for Bug 101651 – llvm patch

[patch] llvm patch

0001-AMDGPU-fix-condition-for-the-VVCZ-bug-workaround.patch (text/plain), 1.18 KB, created by Vadim Girlin on 2017-06-29 17:59:36 UTC

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Creator: Vadim Girlin

Created: 2017-06-29 17:59:36 UTC

Size: 1.18 KB

patch

obsolete

>From 15cd53d7419a0cc1e5ca4a72ff31d74fd662d9c2 Mon Sep 17 00:00:00 2001
>From: Vadim Girlin <vadimgirlin@gmail.com>
>Date: Thu, 29 Jun 2017 19:08:16 +0300
>Subject: [PATCH] [AMDGPU] fix condition for the VVCZ bug workaround
>
>---
> lib/Target/AMDGPU/SIInsertWaitcnts.cpp | 8 ++------
> 1 file changed, 2 insertions(+), 6 deletions(-)
>
>diff --git a/lib/Target/AMDGPU/SIInsertWaitcnts.cpp b/lib/Target/AMDGPU/SIInsertWaitcnts.cpp
>index 0f009a48754..447cb9b5915 100644
>--- a/lib/Target/AMDGPU/SIInsertWaitcnts.cpp
>+++ b/lib/Target/AMDGPU/SIInsertWaitcnts.cpp
>@@ -1525,12 +1525,8 @@ void SIInsertWaitcnts::insertWaitcntInBlock(MachineFunction &MF,
>     bool VCCZBugWorkAround = false;
>     if (readsVCCZ(Inst) &&
>         (VCCZBugHandledSet.find(&Inst) == VCCZBugHandledSet.end())) {
>-      if (ScoreBrackets->getScoreLB(LGKM_CNT) <
>-              ScoreBrackets->getScoreUB(LGKM_CNT) &&
>-          ScoreBrackets->hasPendingSMEM()) {
>-        if (ST->getGeneration() <= SISubtarget::SEA_ISLANDS)
>-          VCCZBugWorkAround = true;
>-      }
>+      if (ST->getGeneration() <= SISubtarget::SEA_ISLANDS)
>+        VCCZBugWorkAround = true;
>     }
> 
>     // Generate an s_waitcnt instruction to be placed before
>-- 
>2.13.0
>

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