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[Outline] When outlining a helper function, remove any prologue data cloned from the parent function onto the helper. Addresses issue llvm#77.
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‎llvm/lib/Transforms/Tapir/Outline.cpp‎

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Original file line numberDiff line numberDiff line change
@@ -385,6 +385,10 @@ Function *llvm::CreateHelper(
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AttributeList::get(NewFunc->getContext(), OldAttrs.getFnAttrs(),
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OldAttrs.getRetAttrs(), NewArgAttrs));
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// Remove prologue data
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if (NewFunc->hasPrologueData())
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NewFunc->setPrologueData(nullptr);
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// Remove old return attributes.
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NewFunc->removeRetAttrs(
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AttributeFuncs::typeIncompatible(NewFunc->getReturnType()));

‎llvm/test/Transforms/Tapir/outline-prologue-data.ll‎

Lines changed: 318 additions & 0 deletions
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@@ -0,0 +1,318 @@
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; Check that prologue data attached to a function with Tapir
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; instructions does not get copied to a generated helper function.
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;
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; RUN: opt < %s -tapir2target -tapir-target=opencilk -opencilk-runtime-bc-path=%S/libopencilk-abi.bc -S | FileCheck %s
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target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"
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target triple = "x86_64-unknown-linux-gnu"
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%class.object = type { i8 }
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%class.anon = type { i8 }
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$_ZN6object4funcEv = comdat any
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$_Z12parallel_forIZN6object4funcEvEUliE_EviiT_ = comdat any
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$_ZZN6object4funcEvENKUliE_clEi = comdat any
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$_ZTSFvvE = comdat any
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$_ZTIFvvE = comdat any
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$_ZTSFivE = comdat any
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$_ZTIFivE = comdat any
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$_ZTSFviiZN6object4funcEvEUliE_E = comdat any
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$_ZTIFviiZN6object4funcEvEUliE_E = comdat any
28+
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@_ZTVN10__cxxabiv120__function_type_infoE = external dso_local global i8*
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@_ZTSFvvE = linkonce_odr dso_local constant [5 x i8] c"FvvE\00", comdat, align 1
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@_ZTIFvvE = linkonce_odr dso_local constant { i8*, i8* } { i8* bitcast (i8** getelementptr inbounds (i8*, i8** @_ZTVN10__cxxabiv120__function_type_infoE, i64 2) to i8*), i8* getelementptr inbounds ([5 x i8], [5 x i8]* @_ZTSFvvE, i32 0, i32 0) }, comdat, align 8
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@0 = private constant i8* bitcast ({ i8*, i8* }* @_ZTIFvvE to i8*)
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@_ZTSFivE = linkonce_odr dso_local constant [5 x i8] c"FivE\00", comdat, align 1
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@_ZTIFivE = linkonce_odr dso_local constant { i8*, i8* } { i8* bitcast (i8** getelementptr inbounds (i8*, i8** @_ZTVN10__cxxabiv120__function_type_infoE, i64 2) to i8*), i8* getelementptr inbounds ([5 x i8], [5 x i8]* @_ZTSFivE, i32 0, i32 0) }, comdat, align 8
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@1 = private constant i8* bitcast ({ i8*, i8* }* @_ZTIFivE to i8*)
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@.src = private unnamed_addr constant [17 x i8] c"bug-20220610.cpp\00", align 1
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@2 = private unnamed_addr constant { i16, i16, [11 x i8] } { i16 -1, i16 0, [11 x i8] c"'object *'\00" }
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@3 = private unnamed_addr global { { [17 x i8]*, i32, i32 }, { i16, i16, [11 x i8] }*, i8, i8 } { { [17 x i8]*, i32, i32 } { [17 x i8]* @.src, i32 11, i32 8 }, { i16, i16, [11 x i8] }* @2, i8 0, i8 4 }
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@_ZTSFviiZN6object4funcEvEUliE_E = linkonce_odr dso_local constant [28 x i8] c"FviiZN6object4funcEvEUliE_E\00", comdat, align 1
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@_ZTIFviiZN6object4funcEvEUliE_E = linkonce_odr dso_local constant { i8*, i8* } { i8* bitcast (i8** getelementptr inbounds (i8*, i8** @_ZTVN10__cxxabiv120__function_type_infoE, i64 2) to i8*), i8* getelementptr inbounds ([28 x i8], [28 x i8]* @_ZTSFviiZN6object4funcEvEUliE_E, i32 0, i32 0) }, comdat, align 8
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@4 = private constant i8* bitcast ({ i8*, i8* }* @_ZTIFviiZN6object4funcEvEUliE_E to i8*)
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@5 = private unnamed_addr constant { i16, i16, [6 x i8] } { i16 0, i16 11, [6 x i8] c"'int'\00" }
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@6 = private unnamed_addr global { { [17 x i8]*, i32, i32 }, { i16, i16, [6 x i8] }* } { { [17 x i8]*, i32, i32 } { [17 x i8]* @.src, i32 4, i32 29 }, { i16, i16, [6 x i8] }* @5 }
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@7 = private unnamed_addr global { { [17 x i8]*, i32, i32 }, { i16, i16, [6 x i8] }* } { { [17 x i8]*, i32, i32 } { [17 x i8]* @.src, i32 4, i32 29 }, { i16, i16, [6 x i8] }* @5 }
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@8 = private unnamed_addr global { { [17 x i8]*, i32, i32 }, { i16, i16, [6 x i8] }* } { { [17 x i8]*, i32, i32 } { [17 x i8]* @.src, i32 4, i32 29 }, { i16, i16, [6 x i8] }* @5 }
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@9 = private unnamed_addr global { { [17 x i8]*, i32, i32 }, { i16, i16, [6 x i8] }* } { { [17 x i8]*, i32, i32 } { [17 x i8]* @.src, i32 4, i32 29 }, { i16, i16, [6 x i8] }* @5 }
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@10 = private unnamed_addr global { { [17 x i8]*, i32, i32 }, { i16, i16, [6 x i8] }* } { { [17 x i8]*, i32, i32 } { [17 x i8]* @.src, i32 4, i32 12 }, { i16, i16, [6 x i8] }* @5 }
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@11 = private unnamed_addr global { { [17 x i8]*, i32, i32 }, { i16, i16, [6 x i8] }* } { { [17 x i8]*, i32, i32 } { [17 x i8]* @.src, i32 4, i32 12 }, { i16, i16, [6 x i8] }* @5 }
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@12 = private unnamed_addr global { { [17 x i8]*, i32, i32 }, { i16, i16, [6 x i8] }* } { { [17 x i8]*, i32, i32 } { [17 x i8]* @.src, i32 4, i32 37 }, { i16, i16, [6 x i8] }* @5 }
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@13 = private unnamed_addr constant { i16, i16, [45 x i8] } { i16 -1, i16 0, [45 x i8] c"'const (lambda at bug-20220610.cpp:12:26) *'\00" }
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@14 = private unnamed_addr global { { [17 x i8]*, i32, i32 }, { i16, i16, [45 x i8] }*, i8, i8 } { { [17 x i8]*, i32, i32 } { [17 x i8]* @.src, i32 12, i32 26 }, { i16, i16, [45 x i8] }* @13, i8 0, i8 4 }
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; Function Attrs: mustprogress noinline nounwind optnone uwtable
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define dso_local void @_Z3addv() #0 prologue <{ i32, i32 }> <{ i32 846595819, i32 trunc (i64 sub (i64 ptrtoint (i8** @0 to i64), i64 ptrtoint (void ()* @_Z3addv to i64)) to i32) }> {
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entry:
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ret void
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}
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; Function Attrs: mustprogress noinline norecurse optnone uwtable
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define dso_local noundef i32 @main() #1 prologue <{ i32, i32 }> <{ i32 846595819, i32 trunc (i64 sub (i64 ptrtoint (i8** @1 to i64), i64 ptrtoint (i32 ()* @main to i64)) to i32) }> {
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entry:
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%retval = alloca i32, align 4
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%foo = alloca %class.object, align 1
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store i32 0, i32* %retval, align 4
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call void @_ZN6object4funcEv(%class.object* noundef nonnull align 1 dereferenceable(1) %foo)
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ret i32 0
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}
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; Function Attrs: mustprogress noinline optnone uwtable
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define linkonce_odr dso_local void @_ZN6object4funcEv(%class.object* noundef nonnull align 1 dereferenceable(1) %this) #2 comdat align 2 {
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entry:
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%this.addr = alloca %class.object*, align 8
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%agg.tmp = alloca %class.anon, align 1
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store %class.object* %this, %class.object** %this.addr, align 8
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%this1 = load %class.object*, %class.object** %this.addr, align 8
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%0 = icmp ne %class.object* %this1, null, !nosanitize !4
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br i1 %0, label %cont, label %handler.type_mismatch, !prof !5, !nosanitize !4
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handler.type_mismatch: ; preds = %entry
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%1 = ptrtoint %class.object* %this1 to i64, !nosanitize !4
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call void @__ubsan_handle_type_mismatch_v1(i8* bitcast ({ { [17 x i8]*, i32, i32 }, { i16, i16, [11 x i8] }*, i8, i8 }* @3 to i8*), i64 %1) #7, !nosanitize !4
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br label %cont, !nosanitize !4
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cont: ; preds = %handler.type_mismatch, %entry
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call void @_Z12parallel_forIZN6object4funcEvEUliE_EviiT_(i32 noundef 0, i32 noundef 111)
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ret void
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}
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; Function Attrs: uwtable
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declare dso_local void @__ubsan_handle_type_mismatch_v1(i8*, i64) #3
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; Function Attrs: mustprogress noinline optnone uwtable
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define linkonce_odr dso_local void @_Z12parallel_forIZN6object4funcEvEUliE_EviiT_(i32 noundef %start, i32 noundef %end) #2 comdat prologue <{ i32, i32 }> <{ i32 846595819, i32 trunc (i64 sub (i64 ptrtoint (i8** @4 to i64), i64 ptrtoint (void (i32, i32)* @_Z12parallel_forIZN6object4funcEvEUliE_EviiT_ to i64)) to i32) }> {
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entry:
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%f = alloca %class.anon, align 1
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%start.addr = alloca i32, align 4
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%end.addr = alloca i32, align 4
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%syncreg = call token @llvm.syncregion.start()
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%__init = alloca i32, align 4
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%__limit = alloca i32, align 4
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%__begin = alloca i32, align 4
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%__end = alloca i32, align 4
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store i32 %start, i32* %start.addr, align 4
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store i32 %end, i32* %end.addr, align 4
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%0 = load i32, i32* %start.addr, align 4
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store i32 %0, i32* %__init, align 4
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%1 = load i32, i32* %end.addr, align 4
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store i32 %1, i32* %__limit, align 4
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%2 = load i32, i32* %__init, align 4
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%3 = load i32, i32* %__limit, align 4
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%cmp = icmp slt i32 %2, %3
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br i1 %cmp, label %pfor.ph, label %pfor.end
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pfor.ph: ; preds = %entry
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store i32 0, i32* %__begin, align 4
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%4 = load i32, i32* %__limit, align 4
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%5 = load i32, i32* %__init, align 4
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%6 = call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 %4, i32 %5), !nosanitize !4
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%7 = extractvalue { i32, i1 } %6, 0, !nosanitize !4
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%8 = extractvalue { i32, i1 } %6, 1, !nosanitize !4
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%9 = xor i1 %8, true, !nosanitize !4
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br i1 %9, label %cont, label %handler.sub_overflow, !prof !5, !nosanitize !4
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handler.sub_overflow: ; preds = %pfor.ph
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%10 = zext i32 %4 to i64, !nosanitize !4
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%11 = zext i32 %5 to i64, !nosanitize !4
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call void @__ubsan_handle_sub_overflow(i8* bitcast ({ { [17 x i8]*, i32, i32 }, { i16, i16, [6 x i8] }* }* @6 to i8*), i64 %10, i64 %11) #7, !nosanitize !4
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br label %cont, !nosanitize !4
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cont: ; preds = %handler.sub_overflow, %pfor.ph
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%12 = call { i32, i1 } @llvm.ssub.with.overflow.i32(i32 %7, i32 1), !nosanitize !4
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%13 = extractvalue { i32, i1 } %12, 0, !nosanitize !4
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%14 = extractvalue { i32, i1 } %12, 1, !nosanitize !4
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%15 = xor i1 %14, true, !nosanitize !4
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br i1 %15, label %cont2, label %handler.sub_overflow1, !prof !5, !nosanitize !4
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handler.sub_overflow1: ; preds = %cont
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%16 = zext i32 %7 to i64, !nosanitize !4
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call void @__ubsan_handle_sub_overflow(i8* bitcast ({ { [17 x i8]*, i32, i32 }, { i16, i16, [6 x i8] }* }* @7 to i8*), i64 %16, i64 1) #7, !nosanitize !4
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br label %cont2, !nosanitize !4
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cont2: ; preds = %handler.sub_overflow1, %cont
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%17 = icmp ne i32 %13, -2147483648, !nosanitize !4
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%or = or i1 %17, true, !nosanitize !4
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%18 = and i1 true, %or, !nosanitize !4
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br i1 %18, label %cont3, label %handler.divrem_overflow, !prof !5, !nosanitize !4
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handler.divrem_overflow: ; preds = %cont2
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%19 = zext i32 %13 to i64, !nosanitize !4
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call void @__ubsan_handle_divrem_overflow(i8* bitcast ({ { [17 x i8]*, i32, i32 }, { i16, i16, [6 x i8] }* }* @8 to i8*), i64 %19, i64 1) #7, !nosanitize !4
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br label %cont3, !nosanitize !4
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cont3: ; preds = %handler.divrem_overflow, %cont2
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%div = sdiv i32 %13, 1
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%20 = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 %div, i32 1), !nosanitize !4
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%21 = extractvalue { i32, i1 } %20, 0, !nosanitize !4
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%22 = extractvalue { i32, i1 } %20, 1, !nosanitize !4
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%23 = xor i1 %22, true, !nosanitize !4
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br i1 %23, label %cont4, label %handler.add_overflow, !prof !5, !nosanitize !4
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handler.add_overflow: ; preds = %cont3
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%24 = zext i32 %div to i64, !nosanitize !4
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call void @__ubsan_handle_add_overflow(i8* bitcast ({ { [17 x i8]*, i32, i32 }, { i16, i16, [6 x i8] }* }* @9 to i8*), i64 %24, i64 1) #7, !nosanitize !4
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br label %cont4, !nosanitize !4
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cont4: ; preds = %handler.add_overflow, %cont3
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store i32 %21, i32* %__end, align 4
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br label %pfor.cond
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pfor.cond: ; preds = %cont9, %cont4
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br label %pfor.detach
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pfor.detach: ; preds = %pfor.cond
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%25 = load i32, i32* %__init, align 4
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%26 = load i32, i32* %__begin, align 4
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%27 = call { i32, i1 } @llvm.smul.with.overflow.i32(i32 %26, i32 1), !nosanitize !4
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%28 = extractvalue { i32, i1 } %27, 0, !nosanitize !4
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%29 = extractvalue { i32, i1 } %27, 1, !nosanitize !4
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%30 = xor i1 %29, true, !nosanitize !4
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br i1 %30, label %cont5, label %handler.mul_overflow, !prof !5, !nosanitize !4
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handler.mul_overflow: ; preds = %pfor.detach
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%31 = zext i32 %26 to i64, !nosanitize !4
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call void @__ubsan_handle_mul_overflow(i8* bitcast ({ { [17 x i8]*, i32, i32 }, { i16, i16, [6 x i8] }* }* @10 to i8*), i64 %31, i64 1) #7, !nosanitize !4
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br label %cont5, !nosanitize !4
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cont5: ; preds = %handler.mul_overflow, %pfor.detach
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%32 = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 %25, i32 %28), !nosanitize !4
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%33 = extractvalue { i32, i1 } %32, 0, !nosanitize !4
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%34 = extractvalue { i32, i1 } %32, 1, !nosanitize !4
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%35 = xor i1 %34, true, !nosanitize !4
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br i1 %35, label %cont7, label %handler.add_overflow6, !prof !5, !nosanitize !4
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handler.add_overflow6: ; preds = %cont5
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%36 = zext i32 %25 to i64, !nosanitize !4
196+
%37 = zext i32 %28 to i64, !nosanitize !4
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call void @__ubsan_handle_add_overflow(i8* bitcast ({ { [17 x i8]*, i32, i32 }, { i16, i16, [6 x i8] }* }* @11 to i8*), i64 %36, i64 %37) #7, !nosanitize !4
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br label %cont7, !nosanitize !4
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cont7: ; preds = %handler.add_overflow6, %cont5
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detach within %syncreg, label %pfor.body.entry, label %pfor.inc
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pfor.body.entry: ; preds = %cont7
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%i = alloca i32, align 4
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store i32 %33, i32* %i, align 4
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br label %pfor.body
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pfor.body: ; preds = %pfor.body.entry
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%38 = load i32, i32* %i, align 4
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call void @_ZZN6object4funcEvENKUliE_clEi(%class.anon* noundef nonnull align 1 dereferenceable(1) %f, i32 noundef %38)
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br label %pfor.preattach
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pfor.preattach: ; preds = %pfor.body
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reattach within %syncreg, label %pfor.inc
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pfor.inc: ; preds = %pfor.preattach, %cont7
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%39 = load i32, i32* %__begin, align 4
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%40 = call { i32, i1 } @llvm.sadd.with.overflow.i32(i32 %39, i32 1), !nosanitize !4
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%41 = extractvalue { i32, i1 } %40, 0, !nosanitize !4
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%42 = extractvalue { i32, i1 } %40, 1, !nosanitize !4
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%43 = xor i1 %42, true, !nosanitize !4
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br i1 %43, label %cont9, label %handler.add_overflow8, !prof !5, !nosanitize !4
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handler.add_overflow8: ; preds = %pfor.inc
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%44 = zext i32 %39 to i64, !nosanitize !4
226+
call void @__ubsan_handle_add_overflow(i8* bitcast ({ { [17 x i8]*, i32, i32 }, { i16, i16, [6 x i8] }* }* @12 to i8*), i64 %44, i64 1) #7, !nosanitize !4
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br label %cont9, !nosanitize !4
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cont9: ; preds = %handler.add_overflow8, %pfor.inc
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store i32 %41, i32* %__begin, align 4
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%45 = load i32, i32* %__begin, align 4
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%46 = load i32, i32* %__end, align 4
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%cmp10 = icmp slt i32 %45, %46
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br i1 %cmp10, label %pfor.cond, label %pfor.cond.cleanup, !llvm.loop !6
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pfor.cond.cleanup: ; preds = %cont9
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sync within %syncreg, label %sync.continue
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sync.continue: ; preds = %pfor.cond.cleanup
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call void @llvm.sync.unwind(token %syncreg)
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br label %pfor.end
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pfor.end: ; preds = %sync.continue, %entry
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ret void
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}
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; Function Attrs: argmemonly nounwind willreturn
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declare token @llvm.syncregion.start() #4
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; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
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declare { i32, i1 } @llvm.ssub.with.overflow.i32(i32, i32) #5
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; Function Attrs: uwtable
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declare dso_local void @__ubsan_handle_sub_overflow(i8*, i64, i64) #3
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; Function Attrs: uwtable
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declare dso_local void @__ubsan_handle_divrem_overflow(i8*, i64, i64) #3
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; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
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declare { i32, i1 } @llvm.sadd.with.overflow.i32(i32, i32) #5
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; Function Attrs: uwtable
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declare dso_local void @__ubsan_handle_add_overflow(i8*, i64, i64) #3
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; Function Attrs: nofree nosync nounwind readnone speculatable willreturn
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declare { i32, i1 } @llvm.smul.with.overflow.i32(i32, i32) #5
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; Function Attrs: uwtable
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declare dso_local void @__ubsan_handle_mul_overflow(i8*, i64, i64) #3
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; Function Attrs: mustprogress noinline nounwind optnone uwtable
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define linkonce_odr dso_local void @_ZZN6object4funcEvENKUliE_clEi(%class.anon* noundef nonnull align 1 dereferenceable(1) %this, i32 noundef %i) #0 comdat align 2 {
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entry:
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%this.addr = alloca %class.anon*, align 8
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%i.addr = alloca i32, align 4
276+
store %class.anon* %this, %class.anon** %this.addr, align 8
277+
store i32 %i, i32* %i.addr, align 4
278+
%this1 = load %class.anon*, %class.anon** %this.addr, align 8
279+
%0 = icmp ne %class.anon* %this1, null, !nosanitize !4
280+
br i1 %0, label %cont, label %handler.type_mismatch, !prof !5, !nosanitize !4
281+
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handler.type_mismatch: ; preds = %entry
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%1 = ptrtoint %class.anon* %this1 to i64, !nosanitize !4
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call void @__ubsan_handle_type_mismatch_v1(i8* bitcast ({ { [17 x i8]*, i32, i32 }, { i16, i16, [45 x i8] }*, i8, i8 }* @14 to i8*), i64 %1) #7, !nosanitize !4
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br label %cont, !nosanitize !4
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cont: ; preds = %handler.type_mismatch, %entry
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call void @_Z3addv()
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ret void
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}
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; CHECK: define internal fastcc void @_Z12parallel_forIZN6object4funcEvEUliE_EviiT_.outline_pfor.body.entry.otd1(
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; CHECK-NOT: prologue
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; CHECK {
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; Function Attrs: argmemonly willreturn
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declare void @llvm.sync.unwind(token) #6
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attributes #0 = { mustprogress noinline nounwind optnone uwtable "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
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attributes #1 = { mustprogress noinline norecurse optnone uwtable "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
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attributes #2 = { mustprogress noinline optnone uwtable "frame-pointer"="all" "min-legal-vector-width"="0" "no-trapping-math"="true" "stack-protector-buffer-size"="8" "target-cpu"="x86-64" "target-features"="+cx8,+fxsr,+mmx,+sse,+sse2,+x87" "tune-cpu"="generic" }
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attributes #3 = { uwtable }
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attributes #4 = { argmemonly nounwind willreturn }
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attributes #5 = { nofree nosync nounwind readnone speculatable willreturn }
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attributes #6 = { argmemonly willreturn }
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attributes #7 = { nounwind }
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!llvm.module.flags = !{!0, !1, !2}
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!llvm.ident = !{!3}
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!0 = !{i32 1, !"wchar_size", i32 4}
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!1 = !{i32 7, !"uwtable", i32 1}
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!2 = !{i32 7, !"frame-pointer", i32 2}
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!3 = !{!"clang version 14.0.4 ([email protected]:OpenCilk/opencilk-project.git bb40f6253a942b78bd0be7d50945fed88960a60e)"}
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!4 = !{}
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!5 = !{!"branch_weights", i32 1048575, i32 1}
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!6 = distinct !{!6, !7}
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!7 = !{!"tapir.loop.spawn.strategy", i32 1}

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