Attachment 139672 Details for Bug 99923 – Patch to disable vectorizer

[patch] Patch to disable vectorizer

0001-hitman.patch (text/plain), 1.18 KB, created by sephiroth99 on 2018-05-22 06:22:43 UTC

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Creator: sephiroth99

Created: 2018-05-22 06:22:43 UTC

Size: 1.18 KB

patch

obsolete

>From 8370620611b3956eb6b6508730675952ff95c4ca Mon Sep 17 00:00:00 2001
>From: sephiroth99 <sephiroth99@gmail.com>
>Date: Tue, 22 May 2018 02:03:03 -0400
>Subject: [PATCH] hitman
>
>---
> src/amd/common/ac_llvm_util.c | 9 +++++++--
> 1 file changed, 7 insertions(+), 2 deletions(-)
>
>diff --git a/src/amd/common/ac_llvm_util.c b/src/amd/common/ac_llvm_util.c
>index be2d92b4c0..23845d2754 100644
>--- a/src/amd/common/ac_llvm_util.c
>+++ b/src/amd/common/ac_llvm_util.c
>@@ -49,10 +49,15 @@ static void ac_init_llvm_target()
> 	 * to disappear.
> 	 * https://reviews.llvm.org/D26348
> 	 *
>+	 * Also, since llvm 4.0, the load-store vectorizer is enabled by
>+	 * default. It can cause display glitches on SI GPUs, so disable it.
>+	 * https://bugs.freedesktop.org/show_bug.cgi?id=99923
>+	 *
> 	 * "mesa" is the prefix for error messages.
> 	 */
>-	const char *argv[2] = { "mesa", "-simplifycfg-sink-common=false" };
>-	LLVMParseCommandLineOptions(2, argv, NULL);
>+	const char *argv[3] = { "mesa", "-simplifycfg-sink-common=false",
>+	                                "-amdgpu-load-store-vectorizer=0" };
>+	LLVMParseCommandLineOptions(3, argv, NULL);
> }
> 
> static once_flag ac_init_llvm_target_once_flag = ONCE_FLAG_INIT;
>-- 
>2.17.0
>

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Attachments on bug 99923: 129874 | 139672 | 139728

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