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1From a57eb548d46a37e4aed33eefccc9e6374b579ff9 Mon Sep 17 00:00:00 2001
2From: Luna Nova <git@lunnova.dev>
3Date: Mon, 16 Dec 2024 13:58:54 -0800
4Subject: [PATCH] [AMDGPU] TargetMachine: increase NameString size to 256
5
6128 is too small a default for compilers used to build
7AMD's rocBLAS, composable_kernel and similar libs because
8they use very long symbol names such as
9device_gemm_xdl_universal_bf16_bf16_bf16_mk_nk_mn_comp_default_instance
10
11This fixes spending ~10% of compile time in malloc inside this function.
12---
13 llvm/lib/Target/TargetMachine.cpp | 2 +-
14 1 file changed, 1 insertion(+), 1 deletion(-)
15
16diff --git a/llvm/lib/Target/TargetMachine.cpp b/llvm/lib/Target/TargetMachine.cpp
17index abd0fdf2390c0..86ce468b75643 100644
18--- a/lib/Target/TargetMachine.cpp
19+++ b/lib/Target/TargetMachine.cpp
20@@ -270,7 +270,7 @@ MCSymbol *TargetMachine::getSymbol(const GlobalValue *GV) const {
21 if (MCSymbol *TargetSymbol = TLOF->getTargetSymbol(GV, *this))
22 return TargetSymbol;
23
24- SmallString<128> NameStr;
25+ SmallString<256> NameStr;
26 getNameWithPrefix(NameStr, GV, TLOF->getMangler());
27 return TLOF->getContext().getOrCreateSymbol(NameStr);
28 }