jdoerfert updated this revision to Diff 246256.
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Add tests, addressed comments
Repository:
rG LLVM Github Monorepo
CHANGES SINCE LAST ACTION
https://reviews.llvm.org/D74925/new/
https://reviews.llvm.org/D74925
Files:
clang/test/OpenMP/PR44893.c
llvm/include/llvm/Frontend/OpenMP/OMPIRBuilder.h
llvm/lib/Transforms/IPO/OpenMPOpt.cpp
llvm/test/Transforms/OpenMP/deduplication.ll
llvm/test/Transforms/OpenMP/gtid.ll
Index: llvm/test/Transforms/OpenMP/gtid.ll
===================================================================
--- llvm/test/Transforms/OpenMP/gtid.ll
+++ /dev/null
@@ -1,86 +0,0 @@
-; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature
-; RUN: opt -openmpopt -S < %s | FileCheck %s
-; RUN: opt -passes=openmpopt -S < %s | FileCheck %s
-target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
-
-%struct.ident_t = type { i32, i32, i32, i32, i8* }
-
-@0 = private unnamed_addr global %struct.ident_t { i32 0, i32 34, i32 0, i32 0, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str, i32 0, i32 0) }, align 8
-@.str = private unnamed_addr constant [23 x i8] c";unknown;unknown;0;0;;\00", align 1
-
-declare i32 @__kmpc_global_thread_num(%struct.ident_t*)
-declare void @useI32(i32)
-
-define void @external(i1 %c) {
-; CHECK-LABEL: define {{[^@]+}}@external
-; CHECK-SAME: (i1 [[C:%.*]])
-; CHECK-NEXT: entry:
-; CHECK-NEXT: [[C2:%.*]] = tail call i32 @__kmpc_global_thread_num(%struct.ident_t* nonnull @0)
-; CHECK-NEXT: br i1 [[C]], label [[T:%.*]], label [[E:%.*]]
-; CHECK: t:
-; CHECK-NEXT: call void @internal(i32 [[C2]], i32 [[C2]])
-; CHECK-NEXT: call void @useI32(i32 [[C2]])
-; CHECK-NEXT: br label [[M:%.*]]
-; CHECK: e:
-; CHECK-NEXT: call void @internal(i32 [[C2]], i32 [[C2]])
-; CHECK-NEXT: call void @useI32(i32 [[C2]])
-; CHECK-NEXT: br label [[M]]
-; CHECK: m:
-; CHECK-NEXT: call void @internal(i32 0, i32 [[C2]])
-; CHECK-NEXT: call void @useI32(i32 [[C2]])
-; CHECK-NEXT: ret void
-;
-entry:
- br i1 %c, label %t, label %e
-t:
- %c0 = tail call i32 @__kmpc_global_thread_num(%struct.ident_t* nonnull @0)
- call void @internal(i32 %c0, i32 %c0)
- call void @useI32(i32 %c0)
- br label %m
-e:
- %c1 = tail call i32 @__kmpc_global_thread_num(%struct.ident_t* nonnull @0)
- call void @internal(i32 %c1, i32 %c1)
- call void @useI32(i32 %c1)
- br label %m
-m:
- %c2 = tail call i32 @__kmpc_global_thread_num(%struct.ident_t* nonnull @0)
- call void @internal(i32 0, i32 %c2)
- call void @useI32(i32 %c2)
- ret void
-}
-
-define internal void @internal(i32 %not_gtid, i32 %gtid) {
-; CHECK-LABEL: define {{[^@]+}}@internal
-; CHECK-SAME: (i32 [[NOT_GTID:%.*]], i32 [[GTID:%.*]])
-; CHECK-NEXT: entry:
-; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[GTID]], [[GTID]]
-; CHECK-NEXT: br i1 [[C]], label [[T:%.*]], label [[E:%.*]]
-; CHECK: t:
-; CHECK-NEXT: call void @useI32(i32 [[GTID]])
-; CHECK-NEXT: call void @external(i1 [[C]])
-; CHECK-NEXT: br label [[M:%.*]]
-; CHECK: e:
-; CHECK-NEXT: call void @useI32(i32 [[GTID]])
-; CHECK-NEXT: br label [[M]]
-; CHECK: m:
-; CHECK-NEXT: call void @useI32(i32 [[GTID]])
-; CHECK-NEXT: ret void
-;
-entry:
- %cc = tail call i32 @__kmpc_global_thread_num(%struct.ident_t* nonnull @0)
- %c = icmp eq i32 %cc, %gtid
- br i1 %c, label %t, label %e
-t:
- %c0 = tail call i32 @__kmpc_global_thread_num(%struct.ident_t* nonnull @0)
- call void @useI32(i32 %c0)
- call void @external(i1 %c)
- br label %m
-e:
- %c1 = tail call i32 @__kmpc_global_thread_num(%struct.ident_t* nonnull @0)
- call void @useI32(i32 %c1)
- br label %m
-m:
- %c2 = tail call i32 @__kmpc_global_thread_num(%struct.ident_t* nonnull @0)
- call void @useI32(i32 %c2)
- ret void
-}
Index: llvm/test/Transforms/OpenMP/deduplication.ll
===================================================================
--- /dev/null
+++ llvm/test/Transforms/OpenMP/deduplication.ll
@@ -0,0 +1,223 @@
+; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --function-signature --scrub-attributes
+; RUN: opt -openmpopt -S < %s | FileCheck %s
+; RUN: opt -passes=openmpopt -S < %s | FileCheck %s
+target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
+
+%struct.ident_t = type { i32, i32, i32, i32, i8* }
+
+@0 = private unnamed_addr global %struct.ident_t { i32 0, i32 34, i32 0, i32 0, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str0, i32 0, i32 0) }, align 8
+@1 = private unnamed_addr global %struct.ident_t { i32 0, i32 2, i32 0, i32 0, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str1, i32 0, i32 0) }, align 8
+@2 = private unnamed_addr global %struct.ident_t { i32 0, i32 2, i32 0, i32 0, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str2, i32 0, i32 0) }, align 8
+@.str0 = private unnamed_addr constant [23 x i8] c";unknown;unknown;0;0;;\00", align 1
+@.str1 = private unnamed_addr constant [23 x i8] c";file001;loc0001;0;0;;\00", align 1
+@.str2 = private unnamed_addr constant [23 x i8] c";file002;loc0002;0;0;;\00", align 1
+
+; UTC_ARGS: --disable
+; CHECK-DAG: @0 = private unnamed_addr global %struct.ident_t { i32 0, i32 34, i32 0, i32 0, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str0, i32 0, i32 0) }, align 8
+; CHECK-DAG: @1 = private unnamed_addr global %struct.ident_t { i32 0, i32 2, i32 0, i32 0, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str1, i32 0, i32 0) }, align 8
+; CHECK-DAG: @2 = private unnamed_addr global %struct.ident_t { i32 0, i32 2, i32 0, i32 0, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str2, i32 0, i32 0) }, align 8
+; CHECK-DAG: @.str0 = private unnamed_addr constant [23 x i8] c";unknown;unknown;0;0;;\00", align 1
+; CHECK-DAG: @.str1 = private unnamed_addr constant [23 x i8] c";file001;loc0001;0;0;;\00", align 1
+; CHECK-DAG: @.str2 = private unnamed_addr constant [23 x i8] c";file002;loc0002;0;0;;\00", align 1
+; CHECK-DAG: @3 = private unnamed_addr global %struct.ident_t { i32 0, i32 2, i32 0, i32 0, i8* getelementptr inbounds ([23 x i8], [23 x i8]* @.str0, i32 0, i32 0) }, align 8
+; UTC_ARGS: --enable
+
+
+declare i32 @__kmpc_global_thread_num(%struct.ident_t*)
+declare void @useI32(i32)
+
+define void @external(i1 %c) {
+; CHECK-LABEL: define {{[^@]+}}@external
+; CHECK-SAME: (i1 [[C:%.*]])
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[C2:%.*]] = tail call i32 @__kmpc_global_thread_num(%struct.ident_t* nonnull @0)
+; CHECK-NEXT: br i1 [[C]], label [[T:%.*]], label [[E:%.*]]
+; CHECK: t:
+; CHECK-NEXT: call void @internal(i32 [[C2]], i32 [[C2]])
+; CHECK-NEXT: call void @useI32(i32 [[C2]])
+; CHECK-NEXT: br label [[M:%.*]]
+; CHECK: e:
+; CHECK-NEXT: call void @internal(i32 [[C2]], i32 [[C2]])
+; CHECK-NEXT: call void @useI32(i32 [[C2]])
+; CHECK-NEXT: br label [[M]]
+; CHECK: m:
+; CHECK-NEXT: call void @internal(i32 0, i32 [[C2]])
+; CHECK-NEXT: call void @useI32(i32 [[C2]])
+; CHECK-NEXT: ret void
+;
+entry:
+ br i1 %c, label %t, label %e
+t:
+ %c0 = tail call i32 @__kmpc_global_thread_num(%struct.ident_t* nonnull @0)
+ call void @internal(i32 %c0, i32 %c0)
+ call void @useI32(i32 %c0)
+ br label %m
+e:
+ %c1 = tail call i32 @__kmpc_global_thread_num(%struct.ident_t* nonnull @0)
+ call void @internal(i32 %c1, i32 %c1)
+ call void @useI32(i32 %c1)
+ br label %m
+m:
+ %c2 = tail call i32 @__kmpc_global_thread_num(%struct.ident_t* nonnull @0)
+ call void @internal(i32 0, i32 %c2)
+ call void @useI32(i32 %c2)
+ ret void
+}
+
+define internal void @internal(i32 %not_gtid, i32 %gtid) {
+; CHECK-LABEL: define {{[^@]+}}@internal
+; CHECK-SAME: (i32 [[NOT_GTID:%.*]], i32 [[GTID:%.*]])
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[C:%.*]] = icmp eq i32 [[GTID]], [[GTID]]
+; CHECK-NEXT: br i1 [[C]], label [[T:%.*]], label [[E:%.*]]
+; CHECK: t:
+; CHECK-NEXT: call void @useI32(i32 [[GTID]])
+; CHECK-NEXT: call void @external(i1 [[C]])
+; CHECK-NEXT: br label [[M:%.*]]
+; CHECK: e:
+; CHECK-NEXT: call void @useI32(i32 [[GTID]])
+; CHECK-NEXT: br label [[M]]
+; CHECK: m:
+; CHECK-NEXT: call void @useI32(i32 [[GTID]])
+; CHECK-NEXT: ret void
+;
+entry:
+ %cc = tail call i32 @__kmpc_global_thread_num(%struct.ident_t* nonnull @0)
+ %c = icmp eq i32 %cc, %gtid
+ br i1 %c, label %t, label %e
+t:
+ %c0 = tail call i32 @__kmpc_global_thread_num(%struct.ident_t* nonnull @0)
+ call void @useI32(i32 %c0)
+ call void @external(i1 %c)
+ br label %m
+e:
+ %c1 = tail call i32 @__kmpc_global_thread_num(%struct.ident_t* nonnull @0)
+ call void @useI32(i32 %c1)
+ br label %m
+m:
+ %c2 = tail call i32 @__kmpc_global_thread_num(%struct.ident_t* nonnull @0)
+ call void @useI32(i32 %c2)
+ ret void
+}
+
+
+define void @local_and_global_gtid_calls() {
+; CHECK-LABEL: define {{[^@]+}}@local_and_global_gtid_calls()
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[TID5:%.*]] = call i32 @__kmpc_global_thread_num(%struct.ident_t* @2)
+; CHECK-NEXT: [[DOTKMPC_LOC_ADDR:%.*]] = alloca [[STRUCT_IDENT_T:%.*]], align 8
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: ret void
+;
+entry:
+ %.kmpc_loc.addr = alloca %struct.ident_t, align 8
+ %tid0 = call i32 @__kmpc_global_thread_num(%struct.ident_t* %.kmpc_loc.addr)
+ %tid1 = call i32 @__kmpc_global_thread_num(%struct.ident_t* @1)
+ %tid2 = call i32 @__kmpc_global_thread_num(%struct.ident_t* %.kmpc_loc.addr)
+ call void @useI32(i32 %tid0)
+ call void @useI32(i32 %tid1)
+ call void @useI32(i32 %tid2)
+ %tid3 = call i32 @__kmpc_global_thread_num(%struct.ident_t* %.kmpc_loc.addr)
+ %tid4 = call i32 @__kmpc_global_thread_num(%struct.ident_t* @2)
+ %tid5 = call i32 @__kmpc_global_thread_num(%struct.ident_t* %.kmpc_loc.addr)
+ call void @useI32(i32 %tid3)
+ call void @useI32(i32 %tid4)
+ call void @useI32(i32 %tid5)
+ ret void
+}
+
+define void @local_gtid_calls_only() {
+; CHECK-LABEL: define {{[^@]+}}@local_gtid_calls_only()
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[TID5:%.*]] = call i32 @__kmpc_global_thread_num(%struct.ident_t* @3)
+; CHECK-NEXT: [[DOTKMPC_LOC_ADDR1:%.*]] = alloca [[STRUCT_IDENT_T:%.*]], align 8
+; CHECK-NEXT: [[DOTKMPC_LOC_ADDR2:%.*]] = alloca [[STRUCT_IDENT_T]], align 8
+; CHECK-NEXT: [[DOTKMPC_LOC_ADDR3:%.*]] = alloca [[STRUCT_IDENT_T]], align 8
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: ret void
+;
+entry:
+ %.kmpc_loc.addr1 = alloca %struct.ident_t, align 8
+ %.kmpc_loc.addr2 = alloca %struct.ident_t, align 8
+ %.kmpc_loc.addr3 = alloca %struct.ident_t, align 8
+ %tid0 = call i32 @__kmpc_global_thread_num(%struct.ident_t* %.kmpc_loc.addr1)
+ %tid1 = call i32 @__kmpc_global_thread_num(%struct.ident_t* %.kmpc_loc.addr2)
+ %tid2 = call i32 @__kmpc_global_thread_num(%struct.ident_t* %.kmpc_loc.addr3)
+ call void @useI32(i32 %tid0)
+ call void @useI32(i32 %tid1)
+ call void @useI32(i32 %tid2)
+ %tid3 = call i32 @__kmpc_global_thread_num(%struct.ident_t* %.kmpc_loc.addr1)
+ %tid4 = call i32 @__kmpc_global_thread_num(%struct.ident_t* %.kmpc_loc.addr2)
+ %tid5 = call i32 @__kmpc_global_thread_num(%struct.ident_t* %.kmpc_loc.addr3)
+ call void @useI32(i32 %tid3)
+ call void @useI32(i32 %tid4)
+ call void @useI32(i32 %tid5)
+ ret void
+}
+
+declare i32 @omp_get_level()
+define void @local_and_global_glvl_calls() {
+; CHECK-LABEL: define {{[^@]+}}@local_and_global_glvl_calls()
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[TID5:%.*]] = call i32 @omp_get_level()
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: ret void
+;
+entry:
+ %tid0 = call i32 @omp_get_level()
+ %tid1 = call i32 @omp_get_level()
+ %tid2 = call i32 @omp_get_level()
+ call void @useI32(i32 %tid0)
+ call void @useI32(i32 %tid1)
+ call void @useI32(i32 %tid2)
+ %tid3 = call i32 @omp_get_level()
+ %tid4 = call i32 @omp_get_level()
+ %tid5 = call i32 @omp_get_level()
+ call void @useI32(i32 %tid3)
+ call void @useI32(i32 %tid4)
+ call void @useI32(i32 %tid5)
+ ret void
+}
+
+define void @local_glvl_calls_only() {
+; CHECK-LABEL: define {{[^@]+}}@local_glvl_calls_only()
+; CHECK-NEXT: entry:
+; CHECK-NEXT: [[TID5:%.*]] = call i32 @omp_get_level()
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: call void @useI32(i32 [[TID5]])
+; CHECK-NEXT: ret void
+;
+entry:
+ %tid0 = call i32 @omp_get_level()
+ %tid1 = call i32 @omp_get_level()
+ %tid2 = call i32 @omp_get_level()
+ call void @useI32(i32 %tid0)
+ call void @useI32(i32 %tid1)
+ call void @useI32(i32 %tid2)
+ %tid3 = call i32 @omp_get_level()
+ %tid4 = call i32 @omp_get_level()
+ %tid5 = call i32 @omp_get_level()
+ call void @useI32(i32 %tid3)
+ call void @useI32(i32 %tid4)
+ call void @useI32(i32 %tid5)
+ ret void
+}
Index: llvm/lib/Transforms/IPO/OpenMPOpt.cpp
===================================================================
--- llvm/lib/Transforms/IPO/OpenMPOpt.cpp
+++ llvm/lib/Transforms/IPO/OpenMPOpt.cpp
@@ -201,6 +201,49 @@
return Changed;
}
+ static Value *combinedIdentStruct(Value *Ident0, Value *Ident1,
+ bool GlobalOnly) {
+ // TODO: Figure out how to actually combine multiple debug locations. For
+ // now we just keep the first we find.
+ if (Ident0)
+ return Ident0;
+ if (!GlobalOnly || isa<GlobalValue>(Ident1))
+ return Ident1;
+ return nullptr;
+ }
+
+ /// Return an `struct ident_t*` value that represents the ones used in the
+ /// calls of \p RFI inside of \p F. If \p GlobalOnly is true, we will not
+ /// return a local `struct ident_t*`. For now, if we cannot find a suitable
+ /// return value we create one from scratch. We also do not yet combine
+ /// information, e.g., the source locations, see combinedIdentStruct.
+ Value *getCombinedIdentFromCallUsesIn(RuntimeFunctionInfo &RFI, Function &F,
+ bool GlobalOnly) {
+ Value *Ident = nullptr;
+ auto CombineIdentStruct = [&](Use &U, Function &Caller) {
+ CallInst *CI = getCallIfRegularCall(U, &RFI);
+ if (!CI || &F != &Caller)
+ return false;
+ Ident = combinedIdentStruct(Ident, CI->getArgOperand(0),
+ /* GlobalOnly */ true);
+ return false;
+ };
+ RFI.foreachUse(CombineIdentStruct);
+
+ if (!Ident) {
+ // The IRBuilder uses the insertion block to get to the module, this is
+ // unfortunate but we work around it for now.
+ if (!OMPBuilder.getInsertionPoint().getBlock())
+ OMPBuilder.updateToLocation(OpenMPIRBuilder::InsertPointTy(
+ &F.getEntryBlock(), F.getEntryBlock().begin()));
+ // Create a fallback location if non was found.
+ // TODO: Use the debug locations of the calls instead.
+ Constant *Loc = OMPBuilder.getOrCreateDefaultSrcLocStr();
+ Ident = OMPBuilder.getOrCreateIdent(Loc);
+ }
+ return Ident;
+ }
+
/// Try to eliminiate calls of \p RFI in \p F by reusing an existing one or
/// \p ReplVal if given.
bool deduplicateRuntimeCalls(Function &F, RuntimeFunctionInfo &RFI,
@@ -216,9 +259,25 @@
assert((!ReplVal || (isa<Argument>(ReplVal) &&
cast<Argument>(ReplVal)->getParent() == &F)) &&
"Unexpected replacement value!");
+
+ // TODO: Use dominance to find a good position instead.
+ auto CanBeMoved = [](CallBase &CB) {
+ unsigned NumArgs = CB.getNumArgOperands();
+ if (NumArgs == 0)
+ return true;
+ if (CB.getArgOperand(0)->getType() != IdentPtr)
+ return false;
+ for (unsigned u = 1; u < NumArgs; ++u)
+ if (isa<Instruction>(CB.getArgOperand(u)))
+ return false;
+ return true;
+ };
+
if (!ReplVal) {
for (Use *U : Uses)
if (CallInst *CI = getCallIfRegularCall(*U, &RFI)) {
+ if (!CanBeMoved(*CI))
+ continue;
CI->moveBefore(&*F.getEntryBlock().getFirstInsertionPt());
ReplVal = CI;
break;
@@ -227,6 +286,18 @@
return false;
}
+ // If we use a call as a replacement value we need to make sure the ident is
+ // valid at the new location. For now we just pick a global one, either
+ // existing and used by one of the calls, or created from scratch.
+ if (CallBase *CI = dyn_cast<CallBase>(ReplVal)) {
+ if (CI->getNumArgOperands() > 0 &&
+ CI->getArgOperand(0)->getType() == IdentPtr) {
+ Value *Ident = getCombinedIdentFromCallUsesIn(RFI, F,
+ /* GlobalOnly */ true);
+ CI->setArgOperand(0, Ident);
+ }
+ }
+
bool Changed = false;
auto ReplaceAndDeleteCB = [&](Use &U, Function &Caller) {
CallInst *CI = getCallIfRegularCall(U, &RFI);
Index: llvm/include/llvm/Frontend/OpenMP/OMPIRBuilder.h
===================================================================
--- llvm/include/llvm/Frontend/OpenMP/OMPIRBuilder.h
+++ llvm/include/llvm/Frontend/OpenMP/OMPIRBuilder.h
@@ -188,7 +188,9 @@
///}
-private:
+ /// Return the insertion point used by the underlying IRBuilder.
+ InsertPointTy getInsertionPoint() { return Builder.saveIP(); }
+
/// Update the internal location to \p Loc.
bool updateToLocation(const LocationDescription &Loc) {
Builder.restoreIP(Loc.IP);
Index: clang/test/OpenMP/PR44893.c
===================================================================
--- /dev/null
+++ clang/test/OpenMP/PR44893.c
@@ -0,0 +1,15 @@
+// RUN: %clang -fopenmp -O -g -x c %s -c -disable-output
+
+// Do not crash ;)
+
+void foo()
+{
+#pragma omp critical
+ ;
+}
+
+void bar()
+{
+ foo();
+ foo();
+}
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