python3kgae created this revision.
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Move generateGlobalCtorDtorCalls out of clang CodeGen.
A new transform pass GlobalCtorDtorCalls is created to do the job.
GlobalCtorDtorCalls is registed in
registerPipelineEarlySimplificationEPCallback.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D135429
Files:
clang/lib/CodeGen/CGHLSLRuntime.cpp
clang/lib/CodeGen/CGHLSLRuntime.h
clang/test/CodeGenHLSL/GlobalConstructorFunction.hlsl
clang/test/CodeGenHLSL/GlobalConstructorLib.hlsl
clang/test/CodeGenHLSL/GlobalConstructors.hlsl
clang/test/CodeGenHLSL/GlobalDestructors.hlsl
llvm/lib/Target/DirectX/CMakeLists.txt
llvm/lib/Target/DirectX/DirectXTargetMachine.cpp
llvm/lib/Target/DirectX/GlobalCtorDtorCalls.cpp
llvm/lib/Target/DirectX/GlobalCtorDtorCalls.h
llvm/test/CodeGen/DirectX/global_constructor_cs.ll
llvm/test/CodeGen/DirectX/global_constructor_function.ll
llvm/test/CodeGen/DirectX/global_constructor_lib.ll
llvm/test/CodeGen/DirectX/global_destructor_cs.ll
llvm/test/CodeGen/DirectX/global_destructor_lib.ll
Index: llvm/test/CodeGen/DirectX/global_destructor_lib.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/DirectX/global_destructor_lib.ll
@@ -0,0 +1,186 @@
+; RUN: opt -S -passes="global-ctor-dtor-calls" < %s | FileCheck %s
+
+target datalayout = "e-m:e-p:32:32-i1:32-i8:8-i16:16-i32:32-i64:64-f16:16-f32:32-f64:64-n8:16:32:64"
+target triple = "dxil-unknown-shadermodel6.3-library"
+
+; Make sure global variable for ctors/dtors exist.
+; CHECK:@llvm.global_ctors
+; CHECK:@llvm.global_dtors
+
+;CHECK: define void @main()
+;CHECK-NEXT: entry:
+;CHECK-NEXT: call void @_GLOBAL__sub_I_GlobalDestructors.hlsl()
+;CHECK-NEXT: %0 = call i32 @llvm.dx.flattened.thread.id.in.group()
+;CHECK-NEXT: call void @"?main@@YAXI@Z"(i32 %0)
+;CHECK-NEXT: call void @_GLOBAL__D_a()
+;CHECK-NEXT: ret void
+
+; This is really just a sanity check I needed for myself to verify that
+; function scope static variables also get destroyed properly.
+
+;CHECK: define internal void @_GLOBAL__D_a()
+;CHECK-NEXT: entry:
+;CHECK-NEXT: call void @"??1Tail@@QAA@XZ"(ptr @"?T@?1??Wag@@YAXXZ@4UTail@@A")
+;CHECK-NEXT: call void @"??1Pupper@@QAA@XZ"(ptr @"?GlobalPup@@3UPupper@@A")
+;CHECK-NEXT: ret void
+
+%struct.Pupper = type { i8 }
+%struct.Tail = type { i8 }
+
+$"??1Pupper@@QAA@XZ" = comdat any
+
+$"??1Tail@@QAA@XZ" = comdat any
+
+@"?GlobalPup@@3UPupper@@A" = global %struct.Pupper zeroinitializer, align 1
+@"?T@?1??Wag@@YAXXZ@4UTail@@A" = internal global %struct.Tail zeroinitializer, align 1
+@"?$TSS0@?1??Wag@@YAXXZ@4HA" = internal global i32 0, align 4
+@_Init_thread_epoch = external thread_local global i32, align 4
+@"?Count@Pupper@@2HA" = global i32 0, align 4
+@"?Count@?1??add@Tail@@QAAXH@Z@4HA" = linkonce_odr global i32 0, align 4
[email protected]_ctors = appending global [1 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 65535, ptr @_GLOBAL__sub_I_GlobalDestructors.hlsl, ptr null }]
[email protected]_dtors = appending global [1 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 65535, ptr @_GLOBAL__D_a, ptr null }]
+
+; Function Attrs: nounwind
+define internal void @"??__EGlobalPup@@YAXXZ"() #0 {
+entry:
+ %call = call noundef ptr @"??0Pupper@@QAA@XZ"(ptr noundef nonnull align 1 dereferenceable(1) @"?GlobalPup@@3UPupper@@A")
+ ret void
+}
+
+; Function Attrs: nounwind
+define linkonce_odr noundef ptr @"??0Pupper@@QAA@XZ"(ptr noundef nonnull returned align 1 dereferenceable(1) %this) unnamed_addr #0 align 2 {
+entry:
+ %this.addr = alloca ptr, align 4
+ store ptr %this, ptr %this.addr, align 4
+ %this1 = load ptr, ptr %this.addr, align 4
+ %0 = load i32, ptr @"?Count@Pupper@@2HA", align 4
+ %add = add nsw i32 %0, 1
+ store i32 %add, ptr @"?Count@Pupper@@2HA", align 4
+ ret ptr %this1
+}
+
+; Function Attrs: nounwind
+define linkonce_odr void @"??1Pupper@@QAA@XZ"(ptr noundef nonnull align 1 dereferenceable(1) %this) unnamed_addr #0 comdat align 2 {
+entry:
+ %this.addr = alloca ptr, align 4
+ store ptr %this, ptr %this.addr, align 4
+ %this1 = load ptr, ptr %this.addr, align 4
+ %0 = load i32, ptr @"?Count@Pupper@@2HA", align 4
+ %sub = sub nsw i32 %0, 1
+ store i32 %sub, ptr @"?Count@Pupper@@2HA", align 4
+ ret void
+}
+
+; Function Attrs: nounwind
+define void @"?Wag@@YAXXZ"() #0 {
+entry:
+ %0 = load atomic i32, ptr @"?$TSS0@?1??Wag@@YAXXZ@4HA" unordered, align 4
+ %1 = load i32, ptr @_Init_thread_epoch, align 4
+ %2 = icmp sgt i32 %0, %1
+ br i1 %2, label %init.attempt, label %init.end
+
+init.attempt: ; preds = %entry
+ call void @_Init_thread_header(ptr @"?$TSS0@?1??Wag@@YAXXZ@4HA") #1
+ %3 = load atomic i32, ptr @"?$TSS0@?1??Wag@@YAXXZ@4HA" unordered, align 4
+ %4 = icmp eq i32 %3, -1
+ br i1 %4, label %init, label %init.end
+
+init: ; preds = %init.attempt
+ %call = call noundef ptr @"??0Tail@@QAA@XZ"(ptr noundef nonnull align 1 dereferenceable(1) @"?T@?1??Wag@@YAXXZ@4UTail@@A")
+ call void @_Init_thread_footer(ptr @"?$TSS0@?1??Wag@@YAXXZ@4HA") #1
+ br label %init.end
+
+init.end: ; preds = %init, %init.attempt, %entry
+ call void @"?add@Tail@@QAAXH@Z"(ptr noundef nonnull align 1 dereferenceable(1) @"?T@?1??Wag@@YAXXZ@4UTail@@A", i32 noundef 0)
+ ret void
+}
+
+; Function Attrs: nounwind
+declare void @_Init_thread_header(ptr) #1
+
+; Function Attrs: nounwind
+define linkonce_odr noundef ptr @"??0Tail@@QAA@XZ"(ptr noundef nonnull returned align 1 dereferenceable(1) %this) unnamed_addr #0 align 2 {
+entry:
+ %this.addr = alloca ptr, align 4
+ store ptr %this, ptr %this.addr, align 4
+ %this1 = load ptr, ptr %this.addr, align 4
+ call void @"?add@Tail@@QAAXH@Z"(ptr noundef nonnull align 1 dereferenceable(1) %this1, i32 noundef 1)
+ ret ptr %this1
+}
+
+; Function Attrs: nounwind
+define linkonce_odr void @"??1Tail@@QAA@XZ"(ptr noundef nonnull align 1 dereferenceable(1) %this) unnamed_addr #0 comdat align 2 {
+entry:
+ %this.addr = alloca ptr, align 4
+ store ptr %this, ptr %this.addr, align 4
+ %this1 = load ptr, ptr %this.addr, align 4
+ call void @"?add@Tail@@QAAXH@Z"(ptr noundef nonnull align 1 dereferenceable(1) %this1, i32 noundef -1)
+ ret void
+}
+
+; Function Attrs: nounwind
+declare void @_Init_thread_footer(ptr) #1
+
+; Function Attrs: nounwind
+define linkonce_odr void @"?add@Tail@@QAAXH@Z"(ptr noundef nonnull align 1 dereferenceable(1) %this, i32 noundef %V) #0 align 2 {
+entry:
+ %V.addr = alloca i32, align 4
+ %this.addr = alloca ptr, align 4
+ store i32 %V, ptr %V.addr, align 4
+ store ptr %this, ptr %this.addr, align 4
+ %this1 = load ptr, ptr %this.addr, align 4
+ %0 = load i32, ptr %V.addr, align 4
+ %1 = load i32, ptr @"?Count@?1??add@Tail@@QAAXH@Z@4HA", align 4
+ %add = add nsw i32 %1, %0
+ store i32 %add, ptr @"?Count@?1??add@Tail@@QAAXH@Z@4HA", align 4
+ ret void
+}
+
+; Function Attrs: norecurse nounwind
+define internal void @"?main@@YAXI@Z"(i32 noundef %GI) #2 {
+entry:
+ %GI.addr = alloca i32, align 4
+ store i32 %GI, ptr %GI.addr, align 4
+ call void @"?Wag@@YAXXZ"()
+ ret void
+}
+
+; Function Attrs: norecurse
+define void @main() #3 {
+entry:
+ %0 = call i32 @llvm.dx.flattened.thread.id.in.group()
+ call void @"?main@@YAXI@Z"(i32 %0)
+ ret void
+}
+
+; Function Attrs: nounwind readnone willreturn
+declare i32 @llvm.dx.flattened.thread.id.in.group() #4
+
+; Function Attrs: nounwind
+define internal void @_GLOBAL__sub_I_GlobalDestructors.hlsl() #0 {
+entry:
+ call void @"??__EGlobalPup@@YAXXZ"()
+ ret void
+}
+
+; Function Attrs: nounwind
+define internal void @_GLOBAL__D_a() #0 {
+entry:
+ call void @"??1Tail@@QAA@XZ"(ptr @"?T@?1??Wag@@YAXXZ@4UTail@@A")
+ call void @"??1Pupper@@QAA@XZ"(ptr @"?GlobalPup@@3UPupper@@A")
+ ret void
+}
+
+attributes #0 = { nounwind "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
+attributes #1 = { nounwind }
+attributes #2 = { norecurse nounwind "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
+attributes #3 = { norecurse "frame-pointer"="all" "hlsl.numthreads"="1,1,1" "hlsl.shader"="library" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
+attributes #4 = { nounwind readnone willreturn }
+
+!llvm.module.flags = !{!0, !1}
+!dx.valver = !{!2}
+
+
+!0 = !{i32 1, !"wchar_size", i32 4}
+!1 = !{i32 7, !"frame-pointer", i32 2}
+!2 = !{i32 1, i32 7}
Index: llvm/test/CodeGen/DirectX/global_destructor_cs.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/DirectX/global_destructor_cs.ll
@@ -0,0 +1,185 @@
+; RUN: opt -S -passes="global-ctor-dtor-calls" < %s | FileCheck %s
+
+target datalayout = "e-m:e-p:32:32-i1:32-i8:8-i16:16-i32:32-i64:64-f16:16-f32:32-f64:64-n8:16:32:64"
+target triple = "dxil-unknown-shadermodel6.0-compute"
+
+; Make sure global variable for ctors/dtors removed.
+; CHECK-NOT:@llvm.global_ctors
+; CHECK-NOT:@llvm.global_dtors
+
+;CHECK: define void @main()
+;CHECK-NEXT: entry:
+;CHECK-NEXT: call void @_GLOBAL__sub_I_GlobalDestructors.hlsl()
+;CHECK-NEXT: %0 = call i32 @llvm.dx.flattened.thread.id.in.group()
+;CHECK-NEXT: call void @"?main@@YAXI@Z"(i32 %0)
+;CHECK-NEXT: call void @_GLOBAL__D_a()
+;CHECK-NEXT: ret void
+
+; This is really just a sanity check I needed for myself to verify that
+; function scope static variables also get destroyed properly.
+
+;CHECK: define internal void @_GLOBAL__D_a()
+;CHECK-NEXT: entry:
+;CHECK-NEXT: call void @"??1Tail@@QAA@XZ"(ptr @"?T@?1??Wag@@YAXXZ@4UTail@@A")
+;CHECK-NEXT: call void @"??1Pupper@@QAA@XZ"(ptr @"?GlobalPup@@3UPupper@@A")
+;CHECK-NEXT: ret void
+
+%struct.Pupper = type { i8 }
+%struct.Tail = type { i8 }
+
+$"??1Pupper@@QAA@XZ" = comdat any
+
+$"??1Tail@@QAA@XZ" = comdat any
+
+@"?GlobalPup@@3UPupper@@A" = global %struct.Pupper zeroinitializer, align 1
+@"?T@?1??Wag@@YAXXZ@4UTail@@A" = internal global %struct.Tail zeroinitializer, align 1
+@"?$TSS0@?1??Wag@@YAXXZ@4HA" = internal global i32 0, align 4
+@_Init_thread_epoch = external thread_local global i32, align 4
+@"?Count@Pupper@@2HA" = global i32 0, align 4
+@"?Count@?1??add@Tail@@QAAXH@Z@4HA" = linkonce_odr global i32 0, align 4
[email protected]_ctors = appending global [1 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 65535, ptr @_GLOBAL__sub_I_GlobalDestructors.hlsl, ptr null }]
[email protected]_dtors = appending global [1 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 65535, ptr @_GLOBAL__D_a, ptr null }]
+
+; Function Attrs: nounwind
+define internal void @"??__EGlobalPup@@YAXXZ"() #0 {
+entry:
+ %call = call noundef ptr @"??0Pupper@@QAA@XZ"(ptr noundef nonnull align 1 dereferenceable(1) @"?GlobalPup@@3UPupper@@A")
+ ret void
+}
+
+; Function Attrs: nounwind
+define linkonce_odr noundef ptr @"??0Pupper@@QAA@XZ"(ptr noundef nonnull returned align 1 dereferenceable(1) %this) unnamed_addr #0 align 2 {
+entry:
+ %this.addr = alloca ptr, align 4
+ store ptr %this, ptr %this.addr, align 4
+ %this1 = load ptr, ptr %this.addr, align 4
+ %0 = load i32, ptr @"?Count@Pupper@@2HA", align 4
+ %add = add nsw i32 %0, 1
+ store i32 %add, ptr @"?Count@Pupper@@2HA", align 4
+ ret ptr %this1
+}
+
+; Function Attrs: nounwind
+define linkonce_odr void @"??1Pupper@@QAA@XZ"(ptr noundef nonnull align 1 dereferenceable(1) %this) unnamed_addr #0 comdat align 2 {
+entry:
+ %this.addr = alloca ptr, align 4
+ store ptr %this, ptr %this.addr, align 4
+ %this1 = load ptr, ptr %this.addr, align 4
+ %0 = load i32, ptr @"?Count@Pupper@@2HA", align 4
+ %sub = sub nsw i32 %0, 1
+ store i32 %sub, ptr @"?Count@Pupper@@2HA", align 4
+ ret void
+}
+
+; Function Attrs: nounwind
+define void @"?Wag@@YAXXZ"() #0 {
+entry:
+ %0 = load atomic i32, ptr @"?$TSS0@?1??Wag@@YAXXZ@4HA" unordered, align 4
+ %1 = load i32, ptr @_Init_thread_epoch, align 4
+ %2 = icmp sgt i32 %0, %1
+ br i1 %2, label %init.attempt, label %init.end
+
+init.attempt: ; preds = %entry
+ call void @_Init_thread_header(ptr @"?$TSS0@?1??Wag@@YAXXZ@4HA") #1
+ %3 = load atomic i32, ptr @"?$TSS0@?1??Wag@@YAXXZ@4HA" unordered, align 4
+ %4 = icmp eq i32 %3, -1
+ br i1 %4, label %init, label %init.end
+
+init: ; preds = %init.attempt
+ %call = call noundef ptr @"??0Tail@@QAA@XZ"(ptr noundef nonnull align 1 dereferenceable(1) @"?T@?1??Wag@@YAXXZ@4UTail@@A")
+ call void @_Init_thread_footer(ptr @"?$TSS0@?1??Wag@@YAXXZ@4HA") #1
+ br label %init.end
+
+init.end: ; preds = %init, %init.attempt, %entry
+ call void @"?add@Tail@@QAAXH@Z"(ptr noundef nonnull align 1 dereferenceable(1) @"?T@?1??Wag@@YAXXZ@4UTail@@A", i32 noundef 0)
+ ret void
+}
+
+; Function Attrs: nounwind
+declare void @_Init_thread_header(ptr) #1
+
+; Function Attrs: nounwind
+define linkonce_odr noundef ptr @"??0Tail@@QAA@XZ"(ptr noundef nonnull returned align 1 dereferenceable(1) %this) unnamed_addr #0 align 2 {
+entry:
+ %this.addr = alloca ptr, align 4
+ store ptr %this, ptr %this.addr, align 4
+ %this1 = load ptr, ptr %this.addr, align 4
+ call void @"?add@Tail@@QAAXH@Z"(ptr noundef nonnull align 1 dereferenceable(1) %this1, i32 noundef 1)
+ ret ptr %this1
+}
+
+; Function Attrs: nounwind
+define linkonce_odr void @"??1Tail@@QAA@XZ"(ptr noundef nonnull align 1 dereferenceable(1) %this) unnamed_addr #0 comdat align 2 {
+entry:
+ %this.addr = alloca ptr, align 4
+ store ptr %this, ptr %this.addr, align 4
+ %this1 = load ptr, ptr %this.addr, align 4
+ call void @"?add@Tail@@QAAXH@Z"(ptr noundef nonnull align 1 dereferenceable(1) %this1, i32 noundef -1)
+ ret void
+}
+
+; Function Attrs: nounwind
+declare void @_Init_thread_footer(ptr) #1
+
+; Function Attrs: nounwind
+define linkonce_odr void @"?add@Tail@@QAAXH@Z"(ptr noundef nonnull align 1 dereferenceable(1) %this, i32 noundef %V) #0 align 2 {
+entry:
+ %V.addr = alloca i32, align 4
+ %this.addr = alloca ptr, align 4
+ store i32 %V, ptr %V.addr, align 4
+ store ptr %this, ptr %this.addr, align 4
+ %this1 = load ptr, ptr %this.addr, align 4
+ %0 = load i32, ptr %V.addr, align 4
+ %1 = load i32, ptr @"?Count@?1??add@Tail@@QAAXH@Z@4HA", align 4
+ %add = add nsw i32 %1, %0
+ store i32 %add, ptr @"?Count@?1??add@Tail@@QAAXH@Z@4HA", align 4
+ ret void
+}
+
+; Function Attrs: norecurse nounwind
+define internal void @"?main@@YAXI@Z"(i32 noundef %GI) #2 {
+entry:
+ %GI.addr = alloca i32, align 4
+ store i32 %GI, ptr %GI.addr, align 4
+ call void @"?Wag@@YAXXZ"()
+ ret void
+}
+
+; Function Attrs: norecurse
+define void @main() #3 {
+entry:
+ %0 = call i32 @llvm.dx.flattened.thread.id.in.group()
+ call void @"?main@@YAXI@Z"(i32 %0)
+ ret void
+}
+
+; Function Attrs: nounwind readnone willreturn
+declare i32 @llvm.dx.flattened.thread.id.in.group() #4
+
+; Function Attrs: nounwind
+define internal void @_GLOBAL__sub_I_GlobalDestructors.hlsl() #0 {
+entry:
+ call void @"??__EGlobalPup@@YAXXZ"()
+ ret void
+}
+
+; Function Attrs: nounwind
+define internal void @_GLOBAL__D_a() #0 {
+entry:
+ call void @"??1Tail@@QAA@XZ"(ptr @"?T@?1??Wag@@YAXXZ@4UTail@@A")
+ call void @"??1Pupper@@QAA@XZ"(ptr @"?GlobalPup@@3UPupper@@A")
+ ret void
+}
+
+attributes #0 = { nounwind "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
+attributes #1 = { nounwind }
+attributes #2 = { norecurse nounwind "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
+attributes #3 = { norecurse "frame-pointer"="all" "hlsl.numthreads"="1,1,1" "hlsl.shader"="compute" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
+attributes #4 = { nounwind readnone willreturn }
+
+!llvm.module.flags = !{!0, !1}
+!dx.valver = !{!2}
+
+!0 = !{i32 1, !"wchar_size", i32 4}
+!1 = !{i32 7, !"frame-pointer", i32 2}
+!2 = !{i32 1, i32 7}
Index: llvm/test/CodeGen/DirectX/global_constructor_lib.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/DirectX/global_constructor_lib.ll
@@ -0,0 +1,84 @@
+; RUN: opt -S -passes="global-ctor-dtor-calls" < %s | FileCheck %s
+
+target datalayout = "e-m:e-p:32:32-i1:32-i8:8-i16:16-i32:32-i64:64-f16:16-f32:32-f64:64-n8:16:32:64"
+target triple = "dxil-unknown-shadermodel6.3-library"
+
+; Make sure global variable for ctors exist for lib profile.
+; CHECK:@llvm.global_ctors
+
+%"class.hlsl::RWBuffer" = type { ptr }
+
+@"?Buffer@@3V?$RWBuffer@M@hlsl@@A" = global %"class.hlsl::RWBuffer" zeroinitializer, align 4
[email protected]_ctors = appending global [1 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 65535, ptr @_GLOBAL__sub_I_GlobalConstructorLib.hlsl, ptr null }]
+
+; Function Attrs: nounwind
+define internal void @"??__EBuffer@@YAXXZ"() #0 {
+entry:
+ %call = call noundef ptr @"??0?$RWBuffer@M@hlsl@@QAA@XZ"(ptr noundef nonnull align 4 dereferenceable(4) @"?Buffer@@3V?$RWBuffer@M@hlsl@@A")
+ ret void
+}
+
+; Function Attrs: inlinehint nounwind
+define linkonce_odr noundef ptr @"??0?$RWBuffer@M@hlsl@@QAA@XZ"(ptr noundef nonnull returned align 4 dereferenceable(4) %this) unnamed_addr #1 align 2 {
+entry:
+ %this.addr = alloca ptr, align 4
+ store ptr %this, ptr %this.addr, align 4
+ %this1 = load ptr, ptr %this.addr, align 4
+ %0 = call ptr @llvm.dx.create.handle(i8 1)
+ %h = getelementptr inbounds %"class.hlsl::RWBuffer", ptr %this1, i32 0, i32 0
+ store ptr %0, ptr %h, align 4
+ ret ptr %this1
+}
+
+; Function Attrs: nounwind
+define internal void @"?FirstEntry@@YAXXZ"() #0 {
+entry:
+ ret void
+}
+; CHECK: define void @FirstEntry()
+; CHECK-NEXT: entry:
+; CHECK-NEXT: call void @_GLOBAL__sub_I_GlobalConstructorLib.hlsl()
+define void @FirstEntry() #2 {
+entry:
+ call void @"?FirstEntry@@YAXXZ"()
+ ret void
+}
+
+; Function Attrs: nounwind
+define internal void @"?SecondEntry@@YAXXZ"() #0 {
+entry:
+ ret void
+}
+; CHECK: define void @SecondEntry()
+; CHECK-NEXT: entry:
+; CHECK-NEXT: call void @_GLOBAL__sub_I_GlobalConstructorLib.hlsl()
+; CHECK-NEXT: call void @"?SecondEntry@@YAXXZ"()
+define void @SecondEntry() #2 {
+entry:
+ call void @"?SecondEntry@@YAXXZ"()
+ ret void
+}
+
+; Function Attrs: nounwind willreturn
+declare ptr @llvm.dx.create.handle(i8) #3
+
+; Function Attrs: nounwind
+define internal void @_GLOBAL__sub_I_GlobalConstructorLib.hlsl() #0 {
+entry:
+ call void @"??__EBuffer@@YAXXZ"()
+ ret void
+}
+
+attributes #0 = { nounwind "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
+attributes #1 = { inlinehint nounwind "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
+attributes #2 = { "frame-pointer"="all" "hlsl.numthreads"="1,1,1" "hlsl.shader"="compute" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
+attributes #3 = { nounwind willreturn }
+
+!hlsl.uavs = !{!0}
+!llvm.module.flags = !{!1, !2}
+!dx.valver = !{!3}
+
+!0 = !{ptr @"?Buffer@@3V?$RWBuffer@M@hlsl@@A", !"RWBuffer<float>", i32 0}
+!1 = !{i32 1, !"wchar_size", i32 4}
+!2 = !{i32 7, !"frame-pointer", i32 2}
+!3 = !{i32 1, i32 7}
\ No newline at end of file
Index: llvm/test/CodeGen/DirectX/global_constructor_function.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/DirectX/global_constructor_function.ll
@@ -0,0 +1,71 @@
+; RUN: opt -S -passes="global-ctor-dtor-calls" < %s | FileCheck %s
+
+target datalayout = "e-m:e-p:32:32-i1:32-i8:8-i16:16-i32:32-i64:64-f16:16-f32:32-f64:64-n8:16:32:64"
+target triple = "dxil-unknown-shadermodel6.0-compute"
+
+; Make sure global variable for ctors/dtors removed.
+; CHECK-NOT:@llvm.global_ctors
+; CHECK-NOT:@llvm.global_dtors
+
+@"?i@@3HA" = global i32 0, align 4
[email protected]_ctors = appending global [2 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 65535, ptr @"?call_me_first@@YAXXZ", ptr null }, { i32, ptr, ptr } { i32 65535, ptr @"?then_call_me@@YAXXZ", ptr null }]
[email protected]_dtors = appending global [1 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 65535, ptr @"?call_me_last@@YAXXZ", ptr null }]
+
+; Function Attrs: nounwind
+define void @"?call_me_first@@YAXXZ"() #0 {
+entry:
+ store i32 12, ptr @"?i@@3HA", align 4
+ ret void
+}
+
+; Function Attrs: nounwind
+define void @"?then_call_me@@YAXXZ"() #0 {
+entry:
+ store i32 12, ptr @"?i@@3HA", align 4
+ ret void
+}
+
+; Function Attrs: nounwind
+define void @"?call_me_last@@YAXXZ"() #0 {
+entry:
+ store i32 0, ptr @"?i@@3HA", align 4
+ ret void
+}
+
+; Function Attrs: norecurse nounwind
+define internal void @"?main@@YAXI@Z"(i32 noundef %GI) #1 {
+entry:
+ %GI.addr = alloca i32, align 4
+ store i32 %GI, ptr %GI.addr, align 4
+ ret void
+}
+;CHECK: define void @main()
+;CHECK-NEXT: entry:
+;CHECK-NEXT: call void @"?call_me_first@@YAXXZ"()
+;CHECK-NEXT: call void @"?then_call_me@@YAXXZ"()
+;CHECK-NEXT: %0 = call i32 @llvm.dx.flattened.thread.id.in.group()
+;CHECK-NEXT: call void @"?main@@YAXI@Z"(i32 %0)
+;CHECK-NEXT: call void @"?call_me_last@@YAXXZ"(
+;CHECK-NEXT: ret void
+; Function Attrs: norecurse
+define void @main() #2 {
+entry:
+ %0 = call i32 @llvm.dx.flattened.thread.id.in.group()
+ call void @"?main@@YAXI@Z"(i32 %0)
+ ret void
+}
+
+; Function Attrs: nounwind readnone willreturn
+declare i32 @llvm.dx.flattened.thread.id.in.group() #3
+
+attributes #0 = { nounwind "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
+attributes #1 = { norecurse nounwind "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
+attributes #2 = { norecurse "frame-pointer"="all" "hlsl.numthreads"="1,1,1" "hlsl.shader"="compute" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
+attributes #3 = { nounwind readnone willreturn }
+
+!llvm.module.flags = !{!0, !1}
+!dx.valver = !{!2}
+
+!0 = !{i32 1, !"wchar_size", i32 4}
+!1 = !{i32 7, !"frame-pointer", i32 2}
+!2 = !{i32 1, i32 7}
Index: llvm/test/CodeGen/DirectX/global_constructor_cs.ll
===================================================================
--- /dev/null
+++ llvm/test/CodeGen/DirectX/global_constructor_cs.ll
@@ -0,0 +1,85 @@
+; RUN: opt -S -passes="global-ctor-dtor-calls" < %s | FileCheck %s
+
+target datalayout = "e-m:e-p:32:32-i1:32-i8:8-i16:16-i32:32-i64:64-f16:16-f32:32-f64:64-n8:16:32:64"
+target triple = "dxil-unknown-shadermodel6.0-compute"
+
+; Make sure global variable for ctors/dtors removed.
+; CHECK-NOT:@llvm.global_ctors
+; CHECK-NOT:@llvm.global_dtors
+
+
+%"class.hlsl::RWBuffer" = type { ptr }
+
+@"?Buffer@@3V?$RWBuffer@M@hlsl@@A" = global %"class.hlsl::RWBuffer" zeroinitializer, align 4
[email protected]_ctors = appending global [1 x { i32, ptr, ptr }] [{ i32, ptr, ptr } { i32 65535, ptr @_GLOBAL__sub_I_GlobalConstructors.hlsl, ptr null }]
+
+; Function Attrs: nounwind
+define internal void @"??__EBuffer@@YAXXZ"() #0 {
+entry:
+ %call = call noundef ptr @"??0?$RWBuffer@M@hlsl@@QAA@XZ"(ptr noundef nonnull align 4 dereferenceable(4) @"?Buffer@@3V?$RWBuffer@M@hlsl@@A")
+ ret void
+}
+
+; Function Attrs: inlinehint nounwind
+define linkonce_odr noundef ptr @"??0?$RWBuffer@M@hlsl@@QAA@XZ"(ptr noundef nonnull returned align 4 dereferenceable(4) %this) unnamed_addr #1 align 2 {
+entry:
+ %this.addr = alloca ptr, align 4
+ store ptr %this, ptr %this.addr, align 4
+ %this1 = load ptr, ptr %this.addr, align 4
+ %0 = call ptr @llvm.dx.create.handle(i8 1)
+ %h = getelementptr inbounds %"class.hlsl::RWBuffer", ptr %this1, i32 0, i32 0
+ store ptr %0, ptr %h, align 4
+ ret ptr %this1
+}
+
+; Function Attrs: norecurse nounwind
+define internal void @"?main@@YAXI@Z"(i32 noundef %GI) #2 {
+entry:
+ %GI.addr = alloca i32, align 4
+ store i32 %GI, ptr %GI.addr, align 4
+ ret void
+}
+
+;CHECK: define void @main()
+;CHECK-NEXT: entry:
+;CHECK-NEXT: call void @_GLOBAL__sub_I_GlobalConstructors.hlsl()
+;CHECK-NEXT: %0 = call i32 @llvm.dx.flattened.thread.id.in.group()
+;CHECK-NEXT: call void @"?main@@YAXI@Z"(i32 %0)
+;CHECK-NEXT: ret void
+; Function Attrs: norecurse
+define void @main() #3 {
+entry:
+ %0 = call i32 @llvm.dx.flattened.thread.id.in.group()
+ call void @"?main@@YAXI@Z"(i32 %0)
+ ret void
+}
+
+; Function Attrs: nounwind readnone willreturn
+declare i32 @llvm.dx.flattened.thread.id.in.group() #4
+
+; Function Attrs: nounwind willreturn
+declare ptr @llvm.dx.create.handle(i8) #5
+
+; Function Attrs: nounwind
+define internal void @_GLOBAL__sub_I_GlobalConstructors.hlsl() #0 {
+entry:
+ call void @"??__EBuffer@@YAXXZ"()
+ ret void
+}
+
+attributes #0 = { nounwind "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
+attributes #1 = { inlinehint nounwind "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
+attributes #2 = { norecurse nounwind "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
+attributes #3 = { norecurse "frame-pointer"="all" "hlsl.numthreads"="1,1,1" "hlsl.shader"="compute" "no-trapping-math"="true" "stack-protector-buffer-size"="8" }
+attributes #4 = { nounwind readnone willreturn }
+attributes #5 = { nounwind willreturn }
+
+!hlsl.uavs = !{!0}
+!llvm.module.flags = !{!1, !2}
+!dx.valver = !{!3}
+
+
+!0 = !{ptr @"?Buffer@@3V?$RWBuffer@M@hlsl@@A", !"RWBuffer<float>", i32 0}
+!1 = !{i32 1, !"wchar_size", i32 4}
+!2 = !{i32 7, !"frame-pointer", i32 2}
+!3 = !{i32 1, i32 7}
\ No newline at end of file
Index: llvm/lib/Target/DirectX/GlobalCtorDtorCalls.h
===================================================================
--- /dev/null
+++ llvm/lib/Target/DirectX/GlobalCtorDtorCalls.h
@@ -0,0 +1,30 @@
+//===- Target/DirectX/GlobalCtorDtorCalls.h - calls on global ctor/dtor ---===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Transform pass to generate calls on global ctor and dtor.
+//
+//===----------------------------------------------------------------------===//
+
+#ifndef LLVM_TARGET_DIRECTX__GLOBALCTORDTORCALLS_H
+#define LLVM_TARGET_DIRECTX__GLOBALCTORDTORCALLS_H
+
+#include "llvm/IR/PassManager.h"
+
+namespace llvm {
+
+/// Transform pass to generate calls on global ctors and dtors.
+class GlobalCtorDtorCalls : public PassInfoMixin<GlobalCtorDtorCalls> {
+
+public:
+ explicit GlobalCtorDtorCalls() {}
+ PreservedAnalyses run(Module &M, ModuleAnalysisManager &AM);
+};
+
+} // namespace llvm
+
+#endif
\ No newline at end of file
Index: llvm/lib/Target/DirectX/GlobalCtorDtorCalls.cpp
===================================================================
--- /dev/null
+++ llvm/lib/Target/DirectX/GlobalCtorDtorCalls.cpp
@@ -0,0 +1,84 @@
+//===- Target/DirectX/GlobalCtorDtorCalls.cpp - calls on global ctor/dtor -===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+//
+// Transform pass to generate calls on global ctor and dtor.
+//
+//===----------------------------------------------------------------------===//
+
+#include "GlobalCtorDtorCalls.h"
+#include "llvm/ADT/SmallVector.h"
+#include "llvm/ADT/Triple.h"
+#include "llvm/IR/BasicBlock.h"
+#include "llvm/IR/Function.h"
+#include "llvm/IR/IRBuilder.h"
+
+using namespace llvm;
+
+static void gatherFunctions(SmallVectorImpl<Function *> &Fns, llvm::Module &M,
+ bool CtorOrDtor) {
+ const auto *GV =
+ M.getNamedGlobal(CtorOrDtor ? "llvm.global_ctors" : "llvm.global_dtors");
+ if (!GV)
+ return;
+ const auto *CA = dyn_cast<ConstantArray>(GV->getInitializer());
+ if (!CA)
+ return;
+
+ // The global_ctor array elements are a struct [Priority, Fn *, COMDat].
+ // HLSL neither supports priorities or COMDat values, so we will check those
+ // in an assert but not handle them.
+
+ llvm::SmallVector<Function *> CtorFns;
+ for (const auto &Ctor : CA->operands()) {
+ if (isa<ConstantAggregateZero>(Ctor))
+ continue;
+ ConstantStruct *CS = cast<ConstantStruct>(Ctor);
+
+ assert(cast<ConstantInt>(CS->getOperand(0))->getValue() == 65535 &&
+ "HLSL doesn't support setting priority for global ctors.");
+ assert(isa<ConstantPointerNull>(CS->getOperand(2)) &&
+ "HLSL doesn't support COMDat for global ctors.");
+ Fns.push_back(cast<Function>(CS->getOperand(1)));
+ }
+}
+
+PreservedAnalyses GlobalCtorDtorCalls::run(Module &M,
+ ModuleAnalysisManager &AM) {
+ SmallVector<Function *> CtorFns;
+ SmallVector<Function *> DtorFns;
+ gatherFunctions(CtorFns, M, true);
+ gatherFunctions(DtorFns, M, false);
+
+ // Insert a call to the global constructor at the beginning of the entry block
+ // to externally exported functions. This is a bit of a hack, but HLSL allows
+ // global constructors, but doesn't support driver initialization of globals.
+ for (auto &F : M.functions()) {
+ if (!F.hasFnAttribute("hlsl.shader"))
+ continue;
+ IRBuilder<> B(&F.getEntryBlock(), F.getEntryBlock().begin());
+ for (auto *Fn : CtorFns)
+ B.CreateCall(FunctionCallee(Fn));
+
+ // Insert global dtors before the terminator of the last instruction
+ B.SetInsertPoint(F.back().getTerminator());
+ for (auto *Fn : DtorFns)
+ B.CreateCall(FunctionCallee(Fn));
+ }
+
+ // No need to keep global ctors/dtors for non-lib profile after call to
+ // ctors/dtors added for entry.
+ Triple T(M.getTargetTriple());
+ if (T.getEnvironment() != Triple::EnvironmentType::Library) {
+ if (auto *GV = M.getNamedGlobal("llvm.global_ctors"))
+ GV->eraseFromParent();
+ if (auto *GV = M.getNamedGlobal("llvm.global_dtors"))
+ GV->eraseFromParent();
+ }
+
+ return PreservedAnalyses::all();
+}
Index: llvm/lib/Target/DirectX/DirectXTargetMachine.cpp
===================================================================
--- llvm/lib/Target/DirectX/DirectXTargetMachine.cpp
+++ llvm/lib/Target/DirectX/DirectXTargetMachine.cpp
@@ -17,6 +17,7 @@
#include "DirectX.h"
#include "DirectXSubtarget.h"
#include "DirectXTargetTransformInfo.h"
+#include "GlobalCtorDtorCalls.h"
#include "TargetInfo/DirectXTargetInfo.h"
#include "llvm/CodeGen/MachineModuleInfo.h"
#include "llvm/CodeGen/Passes.h"
@@ -103,12 +104,21 @@
PM.addPass(DXILResourcePrinterPass(dbgs()));
return true;
}
+ if (PassName == "global-ctor-dtor-calls") {
+ PM.addPass(GlobalCtorDtorCalls());
+ return true;
+ }
return false;
});
PB.registerAnalysisRegistrationCallback([](ModuleAnalysisManager &MAM) {
MAM.registerPass([&] { return DXILResourceAnalysis(); });
});
+
+ PB.registerPipelineEarlySimplificationEPCallback(
+ [](ModulePassManager &PM, OptimizationLevel Level) {
+ PM.addPass(GlobalCtorDtorCalls());
+ });
}
bool DirectXTargetMachine::addPassesToEmitFile(
Index: llvm/lib/Target/DirectX/CMakeLists.txt
===================================================================
--- llvm/lib/Target/DirectX/CMakeLists.txt
+++ llvm/lib/Target/DirectX/CMakeLists.txt
@@ -24,6 +24,7 @@
DXILResource.cpp
DXILResourceAnalysis.cpp
DXILTranslateMetadata.cpp
+ GlobalCtorDtorCalls.cpp
PointerTypeAnalysis.cpp
LINK_COMPONENTS
Index: clang/test/CodeGenHLSL/GlobalDestructors.hlsl
===================================================================
--- clang/test/CodeGenHLSL/GlobalDestructors.hlsl
+++ /dev/null
@@ -1,66 +0,0 @@
-// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-compute -std=hlsl202x -S -emit-llvm -disable-llvm-passes %s -o - | FileCheck %s --check-prefixes=CS,CHECK
-// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.3-library -std=hlsl202x -S -emit-llvm -disable-llvm-passes %s -o - | FileCheck %s --check-prefixes=LIB,CHECK
-
-// Make sure global variable for dtors exist for lib profile.
-// LIB:@llvm.global_dtors
-// Make sure global variable for dtors removed for compute profile.
-// CS-NOT:llvm.global_dtors
-
-struct Tail {
- Tail() {
- add(1);
- }
-
- ~Tail() {
- add(-1);
- }
-
- void add(int V) {
- static int Count = 0;
- Count += V;
- }
-};
-
-struct Pupper {
- static int Count;
-
- Pupper() {
- Count += 1; // :)
- }
-
- ~Pupper() {
- Count -= 1; // :(
- }
-} GlobalPup;
-
-void Wag() {
- static Tail T;
- T.add(0);
-}
-
-int Pupper::Count = 0;
-
-[numthreads(1,1,1)]
-void main(unsigned GI : SV_GroupIndex) {
- Wag();
-}
-
-// Make sure global variable for ctors/dtors removed.
-// CHECK-NOT:@llvm.global_ctors
-// CHECK-NOT:@llvm.global_dtors
-//CHECK: define void @main()
-//CHECK-NEXT: entry:
-//CHECK-NEXT: call void @_GLOBAL__sub_I_GlobalDestructors.hlsl()
-//CHECK-NEXT: %0 = call i32 @llvm.dx.flattened.thread.id.in.group()
-//CHECK-NEXT: call void @"?main@@YAXI@Z"(i32 %0)
-//CHECK-NEXT: call void @_GLOBAL__D_a()
-//CHECK-NEXT: ret void
-
-// This is really just a sanity check I needed for myself to verify that
-// function scope static variables also get destroyed properly.
-
-//CHECK: define internal void @_GLOBAL__D_a()
-//CHECK-NEXT: entry:
-//CHECK-NEXT: call void @"??1Tail@@QAA@XZ"(ptr @"?T@?1??Wag@@YAXXZ@4UTail@@A")
-//CHECK-NEXT: call void @"??1Pupper@@QAA@XZ"(ptr @"?GlobalPup@@3UPupper@@A")
-//CHECK-NEXT: ret void
Index: clang/test/CodeGenHLSL/GlobalConstructors.hlsl
===================================================================
--- clang/test/CodeGenHLSL/GlobalConstructors.hlsl
+++ /dev/null
@@ -1,16 +0,0 @@
-// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-compute -x hlsl -S -emit-llvm -disable-llvm-passes %s -o - | FileCheck %s
-
-RWBuffer<float> Buffer;
-
-[numthreads(1,1,1)]
-void main(unsigned GI : SV_GroupIndex) {}
-
-// Make sure global variable for ctors/dtors removed.
-// CHECK-NOT:@llvm.global_ctors
-// CHECK-NOT:@llvm.global_dtors
-//CHECK: define void @main()
-//CHECK-NEXT: entry:
-//CHECK-NEXT: call void @_GLOBAL__sub_I_GlobalConstructors.hlsl()
-//CHECK-NEXT: %0 = call i32 @llvm.dx.flattened.thread.id.in.group()
-//CHECK-NEXT: call void @"?main@@YAXI@Z"(i32 %0)
-//CHECK-NEXT: ret void
Index: clang/test/CodeGenHLSL/GlobalConstructorLib.hlsl
===================================================================
--- clang/test/CodeGenHLSL/GlobalConstructorLib.hlsl
+++ /dev/null
@@ -1,23 +0,0 @@
-// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.3-library -S -emit-llvm -disable-llvm-passes %s -o - | FileCheck %s
-
-// Make sure global variable for ctors exist for lib profile.
-// CHECK:@llvm.global_ctors
-
-RWBuffer<float> Buffer;
-
-[shader("compute")]
-[numthreads(1,1,1)]
-void FirstEntry() {}
-
-// CHECK: define void @FirstEntry()
-// CHECK-NEXT: entry:
-// CHECK-NEXT: call void @_GLOBAL__sub_I_GlobalConstructorLib.hlsl()
-
-[shader("compute")]
-[numthreads(1,1,1)]
-void SecondEntry() {}
-
-// CHECK: define void @SecondEntry()
-// CHECK-NEXT: entry:
-// CHECK-NEXT: call void @_GLOBAL__sub_I_GlobalConstructorLib.hlsl()
-// CHECK-NEXT: call void @"?SecondEntry@@YAXXZ"()
Index: clang/test/CodeGenHLSL/GlobalConstructorFunction.hlsl
===================================================================
--- clang/test/CodeGenHLSL/GlobalConstructorFunction.hlsl
+++ /dev/null
@@ -1,31 +0,0 @@
-// RUN: %clang_cc1 -triple dxil-pc-shadermodel6.0-compute -S -emit-llvm -disable-llvm-passes %s -o - | FileCheck %s
-
-int i;
-
-__attribute__((constructor)) void call_me_first(void) {
- i = 12;
-}
-
-__attribute__((constructor)) void then_call_me(void) {
- i = 12;
-}
-
-__attribute__((destructor)) void call_me_last(void) {
- i = 0;
-}
-
-[numthreads(1,1,1)]
-void main(unsigned GI : SV_GroupIndex) {}
-
-// Make sure global variable for ctors/dtors removed.
-// CHECK-NOT:@llvm.global_ctors
-// CHECK-NOT:@llvm.global_dtors
-
-//CHECK: define void @main()
-//CHECK-NEXT: entry:
-//CHECK-NEXT: call void @"?call_me_first@@YAXXZ"()
-//CHECK-NEXT: call void @"?then_call_me@@YAXXZ"()
-//CHECK-NEXT: %0 = call i32 @llvm.dx.flattened.thread.id.in.group()
-//CHECK-NEXT: call void @"?main@@YAXI@Z"(i32 %0)
-//CHECK-NEXT: call void @"?call_me_last@@YAXXZ"(
-//CHECK-NEXT: ret void
Index: clang/lib/CodeGen/CGHLSLRuntime.h
===================================================================
--- clang/lib/CodeGen/CGHLSLRuntime.h
+++ clang/lib/CodeGen/CGHLSLRuntime.h
@@ -46,7 +46,6 @@
virtual ~CGHLSLRuntime() {}
void annotateHLSLResource(const VarDecl *D, llvm::GlobalVariable *GV);
- void generateGlobalCtorDtorCalls();
void finishCodeGen();
Index: clang/lib/CodeGen/CGHLSLRuntime.cpp
===================================================================
--- clang/lib/CodeGen/CGHLSLRuntime.cpp
+++ clang/lib/CodeGen/CGHLSLRuntime.cpp
@@ -61,7 +61,6 @@
if (T.getArch() == Triple::ArchType::dxil)
addDxilValVersion(TargetOpts.DxilValidatorVersion, M);
- generateGlobalCtorDtorCalls();
if (CGM.getCodeGenOpts().OptimizationLevel == 0)
addDisableOptimizations(M);
}
@@ -162,64 +161,3 @@
// See: https://github.com/llvm/llvm-project/issues/57875
B.CreateRetVoid();
}
-
-static void gatherFunctions(SmallVectorImpl<Function *> &Fns, llvm::Module &M,
- bool CtorOrDtor) {
- const auto *GV =
- M.getNamedGlobal(CtorOrDtor ? "llvm.global_ctors" : "llvm.global_dtors");
- if (!GV)
- return;
- const auto *CA = dyn_cast<ConstantArray>(GV->getInitializer());
- if (!CA)
- return;
- // The global_ctor array elements are a struct [Priority, Fn *, COMDat].
- // HLSL neither supports priorities or COMDat values, so we will check those
- // in an assert but not handle them.
-
- llvm::SmallVector<Function *> CtorFns;
- for (const auto &Ctor : CA->operands()) {
- if (isa<ConstantAggregateZero>(Ctor))
- continue;
- ConstantStruct *CS = cast<ConstantStruct>(Ctor);
-
- assert(cast<ConstantInt>(CS->getOperand(0))->getValue() == 65535 &&
- "HLSL doesn't support setting priority for global ctors.");
- assert(isa<ConstantPointerNull>(CS->getOperand(2)) &&
- "HLSL doesn't support COMDat for global ctors.");
- Fns.push_back(cast<Function>(CS->getOperand(1)));
- }
-}
-
-void CGHLSLRuntime::generateGlobalCtorDtorCalls() {
- llvm::Module &M = CGM.getModule();
- SmallVector<Function *> CtorFns;
- SmallVector<Function *> DtorFns;
- gatherFunctions(CtorFns, M, true);
- gatherFunctions(DtorFns, M, false);
-
- // Insert a call to the global constructor at the beginning of the entry block
- // to externally exported functions. This is a bit of a hack, but HLSL allows
- // global constructors, but doesn't support driver initialization of globals.
- for (auto &F : M.functions()) {
- if (!F.hasFnAttribute("hlsl.shader"))
- continue;
- IRBuilder<> B(&F.getEntryBlock(), F.getEntryBlock().begin());
- for (auto *Fn : CtorFns)
- B.CreateCall(FunctionCallee(Fn));
-
- // Insert global dtors before the terminator of the last instruction
- B.SetInsertPoint(F.back().getTerminator());
- for (auto *Fn : DtorFns)
- B.CreateCall(FunctionCallee(Fn));
- }
-
- // No need to keep global ctors/dtors for non-lib profile after call to
- // ctors/dtors added for entry.
- Triple T(M.getTargetTriple());
- if (T.getEnvironment() != Triple::EnvironmentType::Library) {
- if (auto *GV = M.getNamedGlobal("llvm.global_ctors"))
- GV->eraseFromParent();
- if (auto *GV = M.getNamedGlobal("llvm.global_dtors"))
- GV->eraseFromParent();
- }
-}
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