"stack-size-section",
cl::desc("Emit a section containing stack size metadata"), cl::init(false));
+static cl::opt<bool>
+ EnableAddrsig("addrsig", cl::desc("Emit an address-significance table"),
+ cl::init(false));
+
// Common utility function tightly tied to the options listed here. Initializes
// a TargetOptions object with CodeGen flags and returns it.
static TargetOptions InitTargetOptionsFromCodeGenFlags() {
Options.ExplicitEmulatedTLS = EmulatedTLS.getNumOccurrences() > 0;
Options.ExceptionModel = ExceptionModel;
Options.EmitStackSizeSection = EnableStackSizeSection;
+ Options.EmitAddrsig = EnableAddrsig;
Options.MCOptions = InitMCTargetOptionsFromFlags();
DisableIntegratedAS(false), RelaxELFRelocations(false),
FunctionSections(false), DataSections(false),
UniqueSectionNames(true), TrapUnreachable(false),
- NoTrapAfterNoreturn(false),
- EmulatedTLS(false), ExplicitEmulatedTLS(false),
- EnableIPRA(false), EmitStackSizeSection(false),
- EnableMachineOutliner(false), SupportsDefaultOutlining(false) {}
+ NoTrapAfterNoreturn(false), EmulatedTLS(false),
+ ExplicitEmulatedTLS(false), EnableIPRA(false),
+ EmitStackSizeSection(false), EnableMachineOutliner(false),
+ SupportsDefaultOutlining(false), EmitAddrsig(false) {}
/// PrintMachineCode - This flag is enabled when the -print-machineinstrs
/// option is specified on the command line, and should enable debugging
/// Set if the target supports default outlining behaviour.
unsigned SupportsDefaultOutlining : 1;
+ /// Emit address-significance table.
+ unsigned EmitAddrsig : 1;
+
/// FloatABIType - This setting is set by -float-abi=xxx option is specfied
/// on the command line. This setting may either be Default, Soft, or Hard.
/// Default selects the target's default behavior. Soft selects the ABI for
}
}
+ if (TM.Options.EmitAddrsig) {
+ // Emit address-significance attributes for all globals.
+ OutStreamer->EmitAddrsig();
+ for (const GlobalValue &GV : M.global_values())
+ if (!GV.getName().startswith("llvm.") && !GV.hasAtLeastLocalUnnamedAddr())
+ OutStreamer->EmitAddrsigSym(getSymbol(&GV));
+ }
+
// Allow the target to emit any magic that it wants at the end of the file,
// after everything else has gone out.
EmitEndOfAsmFile(M);
--- /dev/null
+; RUN: llc < %s -mtriple=x86_64-unknown-linux | FileCheck --check-prefix=NO-ADDRSIG %s
+; RUN: llc < %s -mtriple=x86_64-unknown-linux -addrsig | FileCheck %s
+
+; NO-ADDRSIG-NOT: .addrsig
+
+; CHECK: .addrsig
+
+; CHECK: .addrsig_sym f1
+define void @f1() {
+ unreachable
+}
+
+; CHECK-NOT: .addrsig_sym f2
+define internal void @f2() local_unnamed_addr {
+ unreachable
+}
+
+; CHECK-NOT: .addrsig_sym f3
+declare void @f3() unnamed_addr
+
+; CHECK: .addrsig_sym g1
+@g1 = global i32 0
+; CHECK-NOT: .addrsig_sym g2
+@g2 = internal local_unnamed_addr global i32 0
+; CHECK-NOT: .addrsig_sym g3
+@g3 = external unnamed_addr global i32
+
+; CHECK: .addrsig_sym a1
+@a1 = alias i32, i32* @g1
+; CHECK-NOT: .addrsig_sym a2
+@a2 = internal local_unnamed_addr alias i32, i32* @g2
+
+; CHECK: .addrsig_sym i1
+@i1 = ifunc void(), void()* @f1
+; CHECK-NOT: .addrsig_sym i2
+@i2 = internal local_unnamed_addr ifunc void(), void()* @f2