[PATCH] D144302: [PGO] Setting ValueProfNode Array's Alignment
Qiongsi Wu via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Thu Feb 23 12:18:19 PST 2023
qiongsiwu1 updated this revision to Diff 499947.
qiongsiwu1 added a comment.
Address code review - fixing target triple used in the new test. The new test is added because we need a specific data layout to test out ILP32. Are there ways to specify a datalayout for a specific run (similar to how we specify target triples)? If so I will consolidate the tests.
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D144302/new/
https://reviews.llvm.org/D144302
Files:
llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
llvm/test/Instrumentation/InstrProfiling/align32.ll
llvm/test/Instrumentation/InstrProfiling/icall-comdat.ll
Index: llvm/test/Instrumentation/InstrProfiling/icall-comdat.ll
===================================================================
--- llvm/test/Instrumentation/InstrProfiling/icall-comdat.ll
+++ llvm/test/Instrumentation/InstrProfiling/icall-comdat.ll
@@ -10,7 +10,11 @@
; RUN: opt < %s -mtriple=mips64-unknown-linux -passes=instrprof -vp-static-alloc=true -S | FileCheck %s --check-prefix=STATIC-SEXT
; RUN: opt < %s -mtriple=x86_64-unknown-linux -passes=instrprof -vp-static-alloc=false -S | FileCheck %s --check-prefix=DYN
-
+;; Check that counters have the correct alignments.
+; RUN: opt %s -mtriple=powerpc64-unknown-linux -passes=instrprof -S | FileCheck %s --check-prefix=ALIGN
+; RUN: opt %s -mtriple=powerpc-ibm-aix -passes=instrprof -S | FileCheck %s --check-prefix=ALIGN
+; RUN: opt %s -mtriple=powerpc64-ibm-aix -passes=instrprof -S | FileCheck %s --check-prefix=ALIGN
+; RUN: opt %s -mtriple=x86_64-unknown-linux -passes=instrprof -S | FileCheck %s --check-prefix=ALIGN
@__profn_foo = private constant [3 x i8] c"foo"
@__profn_bar = private constant [3 x i8] c"bar"
@@ -62,3 +66,12 @@
; STATIC: declare void @__llvm_profile_instrument_target(i64, ptr, i32)
; STATIC-EXT: declare void @__llvm_profile_instrument_target(i64, ptr, i32 zeroext)
; STATIC-SEXT: declare void @__llvm_profile_instrument_target(i64, ptr, i32 signext)
+
+; ALIGN: @__profc_foo = private global {{.*}} section "__llvm_prf_cnts",{{.*}} align 8
+; ALIGN: @__profvp_foo = private global {{.*}} section "__llvm_prf_vals",{{.*}} align 8
+; ALIGN: @__profd_foo = private global {{.*}} section "__llvm_prf_data",{{.*}} align 8
+; ALIGN: @__profc_bar = private global {{.*}} section "__llvm_prf_cnts",{{.*}} align 8
+; ALIGN: @__profvp_bar = private global {{.*}} section "__llvm_prf_vals",{{.*}} align 8
+; ALIGN: @__profd_bar = private global {{.*}} section "__llvm_prf_data",{{.*}} align 8
+; ALIGN: @__llvm_prf_vnodes = private global {{.*}} section "__llvm_prf_vnds", align 8
+; ALIGN: @__llvm_prf_nm = private constant {{.*}} section "__llvm_prf_names", align 1
Index: llvm/test/Instrumentation/InstrProfiling/align32.ll
===================================================================
--- /dev/null
+++ llvm/test/Instrumentation/InstrProfiling/align32.ll
@@ -0,0 +1,38 @@
+;; Check that the prf_vnodes variable has the correct alignment
+;; when pointers are 4 byte long.
+; RUN: opt %s -passes=instrprof -S | FileCheck %s --check-prefix=ALIGN32
+
+target datalayout = "e-m:e-p:32:32-p270:32:32-p271:32:32-p272:64:64-f64:32:64-f80:32-n8:16:32-S128"
+target triple = "i386-unknown-linux-gnu"
+
+ at __profn_foo = private constant [3 x i8] c"foo"
+ at __profn_bar = private constant [3 x i8] c"bar"
+
+define i32 @foo(ptr ) {
+ call void @llvm.instrprof.increment(ptr @__profn_foo, i64 12884901887, i32 1, i32 0)
+ %2 = ptrtoint ptr %0 to i64
+ call void @llvm.instrprof.value.profile(ptr @__profn_foo, i64 12884901887, i64 %2, i32 0, i32 0)
+ %3 = tail call i32 %0()
+ ret i32 %3
+}
+
+$bar = comdat any
+
+define i32 @bar(ptr ) comdat {
+entry:
+ call void @llvm.instrprof.increment(ptr @__profn_bar, i64 12884901887, i32 1, i32 0)
+ %1 = ptrtoint ptr %0 to i64
+ call void @llvm.instrprof.value.profile(ptr @__profn_bar, i64 12884901887, i64 %1, i32 0, i32 0)
+ %2 = tail call i32 %0()
+ ret i32 %2
+}
+
+; Function Attrs: nounwind
+declare void @llvm.instrprof.increment(ptr, i64, i32, i32) #0
+
+; Function Attrs: nounwind
+declare void @llvm.instrprof.value.profile(ptr, i64, i64, i32, i32) #0
+
+attributes #0 = { nounwind }
+
+; ALIGN32: @__llvm_prf_vnodes = private global {{.*}} section "__llvm_prf_vnds", align 4
Index: llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
===================================================================
--- llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
+++ llvm/lib/Transforms/Instrumentation/InstrProfiling.cpp
@@ -1180,6 +1180,7 @@
Constant::getNullValue(VNodesTy), getInstrProfVNodesVarName());
VNodesVar->setSection(
getInstrProfSectionName(IPSK_vnodes, TT.getObjectFormat()));
+ VNodesVar->setAlignment(M->getDataLayout().getABITypeAlign(VNodesTy));
// VNodesVar is used by runtime but not referenced via relocation by other
// sections. Conservatively make it linker retained.
UsedVars.push_back(VNodesVar);
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