release/20.x: [GlobalMerge][PPC] Don't merge globals in llvm.metadata section (#131801) #134052
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@amy-kwan What do you think about merging this PR to the release branch? |
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@llvm/pr-subscribers-backend-powerpc Author: None (llvmbot) ChangesBackport 9356091 Requested by: @nikic Full diff: https://github.com/llvm/llvm-project/pull/134052.diff 2 Files Affected:
diff --git a/llvm/lib/CodeGen/GlobalMerge.cpp b/llvm/lib/CodeGen/GlobalMerge.cpp
index 5993fc939a08a..b4650a4851c3c 100644
--- a/llvm/lib/CodeGen/GlobalMerge.cpp
+++ b/llvm/lib/CodeGen/GlobalMerge.cpp
@@ -711,7 +711,8 @@ bool GlobalMergeImpl::run(Module &M) {
continue;
// Ignore all 'special' globals.
- if (GV.getName().starts_with("llvm.") || GV.getName().starts_with(".llvm."))
+ if (GV.getName().starts_with("llvm.") ||
+ GV.getName().starts_with(".llvm.") || Section == "llvm.metadata")
continue;
// Ignore all "required" globals:
diff --git a/llvm/test/CodeGen/PowerPC/global-merge-llvm-metadata.ll b/llvm/test/CodeGen/PowerPC/global-merge-llvm-metadata.ll
new file mode 100644
index 0000000000000..7db092e13afeb
--- /dev/null
+++ b/llvm/test/CodeGen/PowerPC/global-merge-llvm-metadata.ll
@@ -0,0 +1,9 @@
+; RUN: llc -mtriple=powerpc64le-unknown-linux-gnu < %s | FileCheck %s
+
+@index = global i32 0, align 4
+@.str = private unnamed_addr constant [1 x i8] zeroinitializer, section "llvm.metadata"
+@.str.1 = private unnamed_addr constant [7 x i8] c"test.c\00", section "llvm.metadata"
+@llvm.global.annotations = appending global [1 x { ptr, ptr, ptr, i32, ptr }] [{ ptr, ptr, ptr, i32, ptr } { ptr @index, ptr @.str, ptr @.str.1, i32 1, ptr null }], section "llvm.metadata"
+
+; CHECK-NOT: .set
+; CHECK-NOT: _MergedGlobals
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Ping @amy-kwan |
github-project-automation
bot
moved this from Needs Review
to Needs Merge
in LLVM Release Status
…#131801) The llvm.metadata section is not emitted and has special semantics. We should not merge globals in it, similarly to how we already skip merging of `llvm.xyz` globals. Fixes llvm#131394. (cherry picked from commit 9356091)
github-project-automation
bot
moved this from Needs Merge
to Done
in LLVM Release Status
|
@nikic (or anyone else). If you would like to add a note about this fix in the release notes (completely optional). Please reply to this comment with a one or two sentence description of the fix. When you are done, please add the release:note label to this PR. |
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Backport 9356091
Requested by: @nikic