[clang] 46475a7 - [AIX][TLS] Diagnose use of unimplemented TLS models
Victor Huang via cfe-commits
cfe-commits at lists.llvm.org
Tue May 11 15:22:00 PDT 2021
Author: Victor Huang
Date: 2021-05-11T17:21:08-05:00
New Revision: 46475a79f85b230fde3e7de8966c96bef14f0d24
URL: https://github.com/llvm/llvm-project/commit/46475a79f85b230fde3e7de8966c96bef14f0d24
DIFF: https://github.com/llvm/llvm-project/commit/46475a79f85b230fde3e7de8966c96bef14f0d24.diff
LOG: [AIX][TLS] Diagnose use of unimplemented TLS models
Add front end diagnostics to report error for unimplemented TLS models set by
- compiler option `-ftls-model`
- attributes like `__thread int __attribute__((tls_model("local-exec"))) var_name;`
Reviewed by: aaron.ballman, nemanjai, PowerPC
Differential Revision: https://reviews.llvm.org/D102070
Added:
clang/test/CodeGen/aix-tls-model.cpp
clang/test/Sema/aix-attr-tls_model.c
Modified:
clang/include/clang/Basic/DiagnosticDriverKinds.td
clang/include/clang/Basic/DiagnosticSemaKinds.td
clang/lib/Frontend/CompilerInvocation.cpp
clang/lib/Sema/SemaDeclAttr.cpp
Removed:
################################################################################
diff --git a/clang/include/clang/Basic/DiagnosticDriverKinds.td b/clang/include/clang/Basic/DiagnosticDriverKinds.td
index d090afa516c75..6e4a60156fef7 100644
--- a/clang/include/clang/Basic/DiagnosticDriverKinds.td
+++ b/clang/include/clang/Basic/DiagnosticDriverKinds.td
@@ -545,6 +545,8 @@ def err_drv_invalid_object_mode : Error<"OBJECT_MODE setting %0 is not recognize
def err_aix_default_altivec_abi : Error<
"The default Altivec ABI on AIX is not yet supported, use '-mabi=vec-extabi' for the extended Altivec ABI">;
+def err_aix_unsupported_tls_model : Error<"TLS model '%0' is not yet supported on AIX">;
+
def err_invalid_cxx_abi : Error<"Invalid C++ ABI name '%0'">;
def err_unsupported_cxx_abi : Error<"C++ ABI '%0' is not supported on target triple '%1'">;
diff --git a/clang/include/clang/Basic/DiagnosticSemaKinds.td b/clang/include/clang/Basic/DiagnosticSemaKinds.td
index 3d665cc76c539..fef8bafad9656 100644
--- a/clang/include/clang/Basic/DiagnosticSemaKinds.td
+++ b/clang/include/clang/Basic/DiagnosticSemaKinds.td
@@ -3151,6 +3151,8 @@ def warn_objc_redundant_literal_use : Warning<
def err_attr_tlsmodel_arg : Error<"tls_model must be \"global-dynamic\", "
"\"local-dynamic\", \"initial-exec\" or \"local-exec\"">;
+def err_aix_attr_unsupported_tls_model : Error<"TLS model '%0' is not yet supported on AIX">;
+
def err_tls_var_aligned_over_maximum : Error<
"alignment (%0) of thread-local variable %1 is greater than the maximum supported "
"alignment (%2) for a thread-local variable on this target">;
diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp
index 4b0bd30556451..0c5066a2f8cd3 100644
--- a/clang/lib/Frontend/CompilerInvocation.cpp
+++ b/clang/lib/Frontend/CompilerInvocation.cpp
@@ -1808,6 +1808,14 @@ bool CompilerInvocation::ParseCodeGenArgs(CodeGenOptions &Opts, ArgList &Args,
Opts.ExplicitEmulatedTLS = true;
}
+ if (Arg *A = Args.getLastArg(OPT_ftlsmodel_EQ)) {
+ if (T.isOSAIX()) {
+ StringRef Name = A->getValue();
+ if (Name != "global-dynamic")
+ Diags.Report(diag::err_aix_unsupported_tls_model) << Name;
+ }
+ }
+
if (Arg *A = Args.getLastArg(OPT_fdenormal_fp_math_EQ)) {
StringRef Val = A->getValue();
Opts.FPDenormalMode = llvm::parseDenormalFPAttribute(Val);
diff --git a/clang/lib/Sema/SemaDeclAttr.cpp b/clang/lib/Sema/SemaDeclAttr.cpp
index f961076421b5b..72868224cf539 100644
--- a/clang/lib/Sema/SemaDeclAttr.cpp
+++ b/clang/lib/Sema/SemaDeclAttr.cpp
@@ -1935,6 +1935,12 @@ static void handleTLSModelAttr(Sema &S, Decl *D, const ParsedAttr &AL) {
return;
}
+ if (S.Context.getTargetInfo().getTriple().isOSAIX() &&
+ Model != "global-dynamic") {
+ S.Diag(LiteralLoc, diag::err_aix_attr_unsupported_tls_model) << Model;
+ return;
+ }
+
D->addAttr(::new (S.Context) TLSModelAttr(S.Context, AL, Model));
}
diff --git a/clang/test/CodeGen/aix-tls-model.cpp b/clang/test/CodeGen/aix-tls-model.cpp
new file mode 100644
index 0000000000000..a531f558ac796
--- /dev/null
+++ b/clang/test/CodeGen/aix-tls-model.cpp
@@ -0,0 +1,26 @@
+// RUN: %clang_cc1 %s -triple powerpc-unknown-aix -target-cpu pwr8 -emit-llvm -o - | FileCheck %s -check-prefix=CHECK-GD
+// RUN: %clang_cc1 %s -triple powerpc-unknown-aix -target-cpu pwr8 -ftls-model=global-dynamic -emit-llvm -o - | FileCheck %s -check-prefix=CHECK-GD
+// RUN: not %clang_cc1 %s -triple powerpc-unknown-aix -target-cpu pwr8 -ftls-model=local-dynamic -emit-llvm 2>&1 | FileCheck %s -check-prefix=CHECK-LD-ERROR
+// RUN: not %clang_cc1 %s -triple powerpc-unknown-aix -target-cpu pwr8 -ftls-model=initial-exec -emit-llvm 2>&1 | FileCheck %s -check-prefix=CHECK-IE-ERROR
+// RUN: not %clang_cc1 %s -triple powerpc-unknown-aix -target-cpu pwr8 -ftls-model=local-exec -emit-llvm 2>&1 | FileCheck %s -check-prefix=CHECK-LE-ERROR
+// RUN: %clang_cc1 %s -triple powerpc64-unknown-aix -target-cpu pwr8 -emit-llvm -o - | FileCheck %s -check-prefix=CHECK-GD
+// RUN: %clang_cc1 %s -triple powerpc64-unknown-aix -target-cpu pwr8 -ftls-model=global-dynamic -emit-llvm -o - | FileCheck %s -check-prefix=CHECK-GD
+// RUN: not %clang_cc1 %s -triple powerpc64-unknown-aix -target-cpu pwr8 -ftls-model=local-dynamic -emit-llvm 2>&1 | FileCheck %s -check-prefix=CHECK-LD-ERROR
+// RUN: not %clang_cc1 %s -triple powerpc64-unknown-aix -target-cpu pwr8 -ftls-model=initial-exec -emit-llvm 2>&1 | FileCheck %s -check-prefix=CHECK-IE-ERROR
+// RUN: not %clang_cc1 %s -triple powerpc64-unknown-aix -target-cpu pwr8 -ftls-model=local-exec -emit-llvm 2>&1 | FileCheck %s -check-prefix=CHECK-LE-ERROR
+
+int z1 = 0;
+int z2;
+int __thread x;
+int f() {
+ static int __thread y;
+ return y++;
+}
+
+// CHECK-GD: @z1 ={{.*}} global i32 0
+// CHECK-GD: @z2 ={{.*}} global i32 0
+// CHECK-GD: @x ={{.*}} thread_local global i32 0
+// CHECK-GD: @_ZZ1fvE1y = internal thread_local global i32 0
+// CHECK-LD-ERROR: error: TLS model 'local-dynamic' is not yet supported on AIX
+// CHECK-IE-ERROR: error: TLS model 'initial-exec' is not yet supported on AIX
+// CHECK-LE-ERROR: error: TLS model 'local-exec' is not yet supported on AIX
diff --git a/clang/test/Sema/aix-attr-tls_model.c b/clang/test/Sema/aix-attr-tls_model.c
new file mode 100644
index 0000000000000..8cf3086fc1aa0
--- /dev/null
+++ b/clang/test/Sema/aix-attr-tls_model.c
@@ -0,0 +1,11 @@
+// RUN: %clang_cc1 -triple powerpc64-unknown-aix -target-cpu pwr8 -verify -fsyntax-only %s
+// RUN: %clang_cc1 -triple powerpc-unknown-aix -target-cpu pwr8 -verify -fsyntax-only %s
+
+#if !__has_attribute(tls_model)
+#error "Should support tls_model attribute"
+#endif
+
+static __thread int y __attribute((tls_model("global-dynamic"))); // no-warning
+static __thread int y __attribute((tls_model("local-dynamic"))); // expected-error {{TLS model 'local-dynamic' is not yet supported on AIX}}
+static __thread int y __attribute((tls_model("initial-exec"))); // expected-error {{TLS model 'initial-exec' is not yet supported on AIX}}
+static __thread int y __attribute((tls_model("local-exec"))); // expected-error {{TLS model 'local-exec' is not yet supported on AIX}}
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