mirror of
https://github.com/intel/intel-graphics-compiler.git
synced 2025-10-30 08:18:26 +08:00
29 lines
990 B
Diff
29 lines
990 B
Diff
|
From 881bf715f06201a57a4f1a60155b556fedd556db Mon Sep 17 00:00:00 2001
|
||
|
|
From: Victor Mustya <victor.mustya@intel.com>
|
||
|
|
Date: Tue, 22 Aug 2023 11:10:30 -0700
|
||
|
|
Subject: [PATCH] Don't emit bitreverse or bswap intrinsics of illegal bit
|
||
|
|
width during instcombine
|
||
|
|
|
||
|
|
---
|
||
|
|
llvm/lib/Transforms/Utils/Local.cpp | 4 ++++
|
||
|
|
1 file changed, 4 insertions(+)
|
||
|
|
|
||
|
|
diff --git a/llvm/lib/Transforms/Utils/Local.cpp b/llvm/lib/Transforms/Utils/Local.cpp
|
||
|
|
index b2ed95b05..476a5c4c1 100644
|
||
|
|
--- a/llvm/lib/Transforms/Utils/Local.cpp
|
||
|
|
+++ b/llvm/lib/Transforms/Utils/Local.cpp
|
||
|
|
@@ -3312,6 +3312,10 @@ bool llvm::recognizeBSwapOrBitReverseIdiom(
|
||
|
|
if (DemandedBW > ITy->getScalarSizeInBits())
|
||
|
|
return false;
|
||
|
|
|
||
|
|
+ auto &DL = I->getModule()->getDataLayout();
|
||
|
|
+ if (DL.isIllegalInteger(DemandedBW))
|
||
|
|
+ return false;
|
||
|
|
+
|
||
|
|
// Now, is the bit permutation correct for a bswap or a bitreverse? We can
|
||
|
|
// only byteswap values with an even number of bytes.
|
||
|
|
APInt DemandedMask = APInt::getAllOnes(DemandedBW);
|
||
|
|
--
|
||
|
|
2.43.0
|
||
|
|
|