[llvm] [CodeGen] Don't treat thread local globals as large data (PR #67764)
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Thu Sep 28 22:27:17 PDT 2023
llvmbot wrote:
<!--LLVM PR SUMMARY COMMENT-->
@llvm/pr-subscribers-backend-x86
<details>
<summary>Changes</summary>
Otherwise they may mistakenly get the large section flag.
---
Full diff: https://github.com/llvm/llvm-project/pull/67764.diff
2 Files Affected:
- (modified) llvm/lib/Target/TargetMachine.cpp (+1-1)
- (modified) llvm/test/CodeGen/X86/code-model-elf-sections.ll (+10)
``````````diff
diff --git a/llvm/lib/Target/TargetMachine.cpp b/llvm/lib/Target/TargetMachine.cpp
index a20c6847c6c590b..45fb612cb91da19 100644
--- a/llvm/lib/Target/TargetMachine.cpp
+++ b/llvm/lib/Target/TargetMachine.cpp
@@ -40,7 +40,7 @@ TargetMachine::TargetMachine(const Target &T, StringRef DataLayoutString,
TargetMachine::~TargetMachine() = default;
bool TargetMachine::isLargeData(const GlobalVariable *GV) const {
- if (getTargetTriple().getArch() != Triple::x86_64)
+ if (getTargetTriple().getArch() != Triple::x86_64 || GV->isThreadLocal())
return false;
// Large data under the large code model still needs to be thought about, so
// restrict this to medium.
diff --git a/llvm/test/CodeGen/X86/code-model-elf-sections.ll b/llvm/test/CodeGen/X86/code-model-elf-sections.ll
index 941c4dd1f8c9851..716bf01bb59361b 100644
--- a/llvm/test/CodeGen/X86/code-model-elf-sections.ll
+++ b/llvm/test/CodeGen/X86/code-model-elf-sections.ll
@@ -20,21 +20,29 @@
; SMALL: .bss {{.*}} WA {{.*}}
; SMALL: .rodata {{.*}} A {{.*}}
; SMALL: .data.rel.ro {{.*}} WA {{.*}}
+; SMALL: .tbss {{.*}} WAT {{.*}}
+; SMALL: .tdata {{.*}} WAT {{.*}}
; SMALL-DS: .data.data {{.*}} WA {{.*}}
; SMALL-DS: .bss.bss {{.*}} WA {{.*}}
; SMALL-DS: .rodata.rodata {{.*}} A {{.*}}
; SMALL-DS: .data.rel.ro.relro {{.*}} WA {{.*}}
+; SMALL-DS: .tbss.tbss {{.*}} WAT {{.*}}
+; SMALL-DS: .tdata.tdata {{.*}} WAT {{.*}}
; LARGE: .ldata {{.*}} WAl {{.*}}
; LARGE: .lbss {{.*}} WAl {{.*}}
; LARGE: .lrodata {{.*}} Al {{.*}}
; LARGE: .ldata.rel.ro {{.*}} WAl {{.*}}
+; LARGE: .tbss {{.*}} WAT {{.*}}
+; LARGE: .tdata {{.*}} WAT {{.*}}
; LARGE-DS: .ldata.data {{.*}} WAl {{.*}}
; LARGE-DS: .lbss.bss {{.*}} WAl {{.*}}
; LARGE-DS: .lrodata.rodata {{.*}} Al {{.*}}
; LARGE-DS: .ldata.rel.ro.relro {{.*}} WAl {{.*}}
+; LARGE-DS: .tbss.tbss {{.*}} WAT {{.*}}
+; LARGE-DS: .tdata.tdata {{.*}} WAT {{.*}}
target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
target triple = "x86_64--linux"
@@ -43,5 +51,7 @@ target triple = "x86_64--linux"
@bss = internal global [10 x i64] zeroinitializer
@rodata = internal constant [10 x i64] zeroinitializer
@relro = internal constant [10 x ptr] [ptr @func, ptr @func, ptr @func, ptr @func, ptr @func, ptr @func, ptr @func, ptr @func, ptr @func, ptr @func]
+ at tbss = internal thread_local global [10 x i64] zeroinitializer
+ at tdata = internal thread_local global [10 x i64] [i64 1, i64 2, i64 0, i64 0, i64 0, i64 0, i64 0, i64 0, i64 0, i64 0]
declare void @func()
``````````
</details>
https://github.com/llvm/llvm-project/pull/67764
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