[PATCH] D99395: [Propeller] Do not generate the BB address map for empty functions.
Rahman Lavaee via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Mon Mar 29 20:15:10 PDT 2021
This revision was landed with ongoing or failed builds.
This revision was automatically updated to reflect the committed changes.
Closed by commit rG90c401cab634: [Propeller] Do not generate the BB address map for empty functions. (authored by rahmanl).
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D99395/new/
https://reviews.llvm.org/D99395
Files:
llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
llvm/test/CodeGen/X86/basic-block-sections-labels-empty-function.ll
Index: llvm/test/CodeGen/X86/basic-block-sections-labels-empty-function.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/X86/basic-block-sections-labels-empty-function.ll
@@ -0,0 +1,21 @@
+;; Verify that the BB address map is not emitted for empty functions.
+; RUN: llc < %s -mtriple=x86_64 -basic-block-sections=labels | FileCheck %s
+
+define void @empty_func() {
+entry:
+ unreachable
+}
+; CHECK: {{^ *}}.text{{$}}
+; CHECK: empty_func:
+; CHECK: .Lfunc_begin0:
+; CHECK-NOT: .section .llvm_bb_addr_map
+
+define void @func() {
+entry:
+ ret void
+}
+
+; CHECK: func:
+; CHECK: .Lfunc_begin1:
+; CHECK: .section .llvm_bb_addr_map,"o", at llvm_bb_addr_map,.text{{$}}
+; CHECK: .quad .Lfunc_begin1
Index: llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
===================================================================
--- llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
+++ llvm/lib/CodeGen/AsmPrinter/AsmPrinter.cpp
@@ -1430,8 +1430,8 @@
}
// Emit section containing BB address offsets and their metadata, when
- // BB labels are requested for this function.
- if (MF->hasBBLabels())
+ // BB labels are requested for this function. Skip empty functions.
+ if (MF->hasBBLabels() && HasAnyRealCode)
emitBBAddrMapSection(*MF);
// Emit section containing stack size metadata.
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