For PR17164: split -fno-lax-vector-conversion into three different

levels:

 -- none: no lax vector conversions [new GCC default]
 -- integer: only conversions between integer vectors [old GCC default]
 -- all: all conversions between same-size vectors [Clang default]

For now, Clang still defaults to "all" mode, but per my proposal on
cfe-dev (2019-04-10) the default will be changed to "integer" as soon as
that doesn't break lots of testcases. (Eventually I'd like to change the
default to "none" to match GCC and general sanity.)

Following GCC's behavior, the driver flag -flax-vector-conversions is
translated to -flax-vector-conversions=integer.

This reinstates r371805, reverted in r371813, with an additional fix for
lldb.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@371817 91177308-0d34-0410-b5e6-96231b3b80d8

include/clang/Basic/LangOptions.def

@@ -119,7 +119,8 @@ LANGOPT(AppleKext         , 1, 0, "Apple kext support")
 BENIGN_LANGOPT(PascalStrings, 1, 0, "Pascal string support")
 LANGOPT(WritableStrings   , 1, 0, "writable string support")
 LANGOPT(ConstStrings      , 1, 0, "const-qualified string support")
-LANGOPT(LaxVectorConversions , 1, 1, "lax vector conversions")
+ENUM_LANGOPT(LaxVectorConversions, LaxVectorConversionKind, 2,
+             LaxVectorConversionKind::All, "lax vector conversions")
 LANGOPT(AltiVec           , 1, 0, "AltiVec-style vector initializers")
 LANGOPT(ZVector           , 1, 0, "System z vector extensions")
 LANGOPT(Exceptions        , 1, 0, "exception handling")

include/clang/Basic/LangOptions.h

@@ -184,6 +184,16 @@ public:
     FEA_On
   };
 
+  enum class LaxVectorConversionKind {
+    /// Permit no implicit vector bitcasts.
+    None,
+    /// Permit vector bitcasts between integer vectors with different numbers
+    /// of elements but the same total bit-width.
+    Integer,
+    /// Permit vector bitcasts between all vectors with the same total
+    /// bit-width.
+    All,
+  };
 
 public:
   /// Set of enabled sanitizers.

include/clang/Driver/Options.td

@@ -1274,7 +1274,10 @@ def fno_fine_grained_bitfield_accesses : Flag<["-"],
   HelpText<"Use large-integer access for consecutive bitfield runs.">;
 
 def flat__namespace : Flag<["-"], "flat_namespace">;
-def flax_vector_conversions : Flag<["-"], "flax-vector-conversions">, Group<f_Group>;
+def flax_vector_conversions_EQ : Joined<["-"], "flax-vector-conversions=">, Group<f_Group>,
+  HelpText<"Enable implicit vector bit-casts">, Values<"none,integer,all">, Flags<[CC1Option]>;
+def flax_vector_conversions : Flag<["-"], "flax-vector-conversions">, Group<f_Group>,
+  Alias<flax_vector_conversions_EQ>, AliasArgs<["integer"]>;
 def flimited_precision_EQ : Joined<["-"], "flimited-precision=">, Group<f_Group>;
 def fapple_link_rtlib : Flag<["-"], "fapple-link-rtlib">, Group<f_Group>,
   HelpText<"Force linking the clang builtins runtime library">;
@@ -1448,7 +1451,7 @@ def fno_experimental_new_pass_manager : Flag<["-"], "fno-experimental-new-pass-m
 def fveclib : Joined<["-"], "fveclib=">, Group<f_Group>, Flags<[CC1Option]>,
     HelpText<"Use the given vector functions library">, Values<"Accelerate,MASSV,SVML,none">;
 def fno_lax_vector_conversions : Flag<["-"], "fno-lax-vector-conversions">, Group<f_Group>,
-  HelpText<"Disallow implicit conversions between vectors with a different number of elements or different element types">, Flags<[CC1Option]>;
+  Alias<flax_vector_conversions_EQ>, AliasArgs<["none"]>;
 def fno_merge_all_constants : Flag<["-"], "fno-merge-all-constants">, Group<f_Group>,
   HelpText<"Disallow merging of constants">;
 def fno_modules : Flag <["-"], "fno-modules">, Group<f_Group>,

lib/Driver/ToolChains/Clang.cpp

@@ -4678,15 +4678,11 @@ void Clang::ConstructJob(Compilation &C, const JobAction &JA,
   if (TC.SupportsProfiling())
     Args.AddLastArg(CmdArgs, options::OPT_mfentry);
 
-  // -flax-vector-conversions is default.
-  if (!Args.hasFlag(options::OPT_flax_vector_conversions,
-                    options::OPT_fno_lax_vector_conversions))
-    CmdArgs.push_back("-fno-lax-vector-conversions");
-
   if (Args.getLastArg(options::OPT_fapple_kext) ||
       (Args.hasArg(options::OPT_mkernel) && types::isCXX(InputType)))
     CmdArgs.push_back("-fapple-kext");
 
+  Args.AddLastArg(CmdArgs, options::OPT_flax_vector_conversions_EQ);
   Args.AddLastArg(CmdArgs, options::OPT_fobjc_sender_dependent_dispatch);
   Args.AddLastArg(CmdArgs, options::OPT_fdiagnostics_print_source_range_info);
   Args.AddLastArg(CmdArgs, options::OPT_fdiagnostics_parseable_fixits);

lib/Frontend/CompilerInvocation.cpp

@@ -2265,7 +2265,7 @@ void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
   if (Opts.OpenCL) {
     Opts.AltiVec = 0;
     Opts.ZVector = 0;
-    Opts.LaxVectorConversions = 0;
+    Opts.setLaxVectorConversions(LangOptions::LaxVectorConversionKind::None);
     Opts.setDefaultFPContractMode(LangOptions::FPC_On);
     Opts.NativeHalfType = 1;
     Opts.NativeHalfArgsAndReturns = 1;
@@ -2667,8 +2667,18 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK,
   Opts.WritableStrings = Args.hasArg(OPT_fwritable_strings);
   Opts.ConstStrings = Args.hasFlag(OPT_fconst_strings, OPT_fno_const_strings,
                                    Opts.ConstStrings);
-  if (Args.hasArg(OPT_fno_lax_vector_conversions))
-    Opts.LaxVectorConversions = 0;
+  if (Arg *A = Args.getLastArg(OPT_flax_vector_conversions_EQ)) {
+    using LaxKind = LangOptions::LaxVectorConversionKind;
+    if (auto Kind = llvm::StringSwitch<Optional<LaxKind>>(A->getValue())
+                        .Case("none", LaxKind::None)
+                        .Case("integer", LaxKind::Integer)
+                        .Case("all", LaxKind::All)
+                        .Default(llvm::None))
+      Opts.setLaxVectorConversions(*Kind);
+    else
+      Diags.Report(diag::err_drv_invalid_value)
+          << A->getAsString(Args) << A->getValue();
+  }
   if (Args.hasArg(OPT_fno_threadsafe_statics))
     Opts.ThreadsafeStatics = 0;
   Opts.Exceptions = Args.hasArg(OPT_fexceptions);

lib/Sema/SemaExpr.cpp

@@ -6498,8 +6498,28 @@ bool Sema::areLaxCompatibleVectorTypes(QualType srcTy, QualType destTy) {
 bool Sema::isLaxVectorConversion(QualType srcTy, QualType destTy) {
   assert(destTy->isVectorType() || srcTy->isVectorType());
 
-  if (!Context.getLangOpts().LaxVectorConversions)
+  switch (Context.getLangOpts().getLaxVectorConversions()) {
+  case LangOptions::LaxVectorConversionKind::None:
     return false;
+
+  case LangOptions::LaxVectorConversionKind::Integer:
+    if (!srcTy->isIntegralOrEnumerationType()) {
+      auto *Vec = srcTy->getAs<VectorType>();
+      if (!Vec || !Vec->getElementType()->isIntegralOrEnumerationType())
+        return false;
+    }
+    if (!destTy->isIntegralOrEnumerationType()) {
+      auto *Vec = destTy->getAs<VectorType>();
+      if (!Vec || !Vec->getElementType()->isIntegralOrEnumerationType())
+        return false;
+    }
+    // OK, integer (vector) -> integer (vector) bitcast.
+    break;
+
+    case LangOptions::LaxVectorConversionKind::All:
+    break;
+  }
+
   return areLaxCompatibleVectorTypes(srcTy, destTy);
 }
 

test/CodeGen/builtins-ppc-altivec.c

@@ -1,10 +1,10 @@
 // REQUIRES: powerpc-registered-target
 // RUN: %clang_cc1 -target-feature +altivec -triple powerpc-unknown-unknown -emit-llvm %s \
-// RUN:            -fno-lax-vector-conversions -o - | FileCheck %s
+// RUN:            -flax-vector-conversions=none -o - | FileCheck %s
 // RUN: %clang_cc1 -target-feature +altivec -triple powerpc64-unknown-unknown -emit-llvm %s \
-// RUN:            -fno-lax-vector-conversions -o - | FileCheck %s
+// RUN:            -flax-vector-conversions=none -o - | FileCheck %s
 // RUN: %clang_cc1 -target-feature +altivec -triple powerpc64le-unknown-unknown -emit-llvm %s \
-// RUN:            -fno-lax-vector-conversions -o - | FileCheck %s -check-prefix=CHECK-LE
+// RUN:            -flax-vector-conversions=none -o - | FileCheck %s -check-prefix=CHECK-LE
 // RUN: not %clang_cc1 -triple powerpc64le-unknown-unknown -emit-llvm %s \
 // RUN:            -ferror-limit 0 -DNO_ALTIVEC -o - 2>&1 \
 // RUN:            | FileCheck %s -check-prefix=CHECK-NOALTIVEC

test/CodeGen/builtins-systemz-vector.c

@@ -1,5 +1,5 @@
 // REQUIRES: systemz-registered-target
-// RUN: %clang_cc1 -target-cpu z13 -triple s390x-ibm-linux -fno-lax-vector-conversions \
+// RUN: %clang_cc1 -target-cpu z13 -triple s390x-ibm-linux -flax-vector-conversions=none \
 // RUN: -Wall -Wno-unused -Werror -emit-llvm %s -o - | FileCheck %s
 
 typedef __attribute__((vector_size(16))) signed char vec_schar;

test/CodeGen/builtins-systemz-vector2.c

@@ -1,5 +1,5 @@
 // REQUIRES: systemz-registered-target
-// RUN: %clang_cc1 -target-cpu z14 -triple s390x-ibm-linux -fno-lax-vector-conversions \
+// RUN: %clang_cc1 -target-cpu z14 -triple s390x-ibm-linux -flax-vector-conversions=none \
 // RUN: -Wall -Wno-unused -Werror -emit-llvm %s -o - | FileCheck %s
 
 typedef __attribute__((vector_size(16))) signed char vec_schar;

test/CodeGen/builtins-systemz-vector3.c

@@ -1,5 +1,5 @@
 // REQUIRES: systemz-registered-target
-// RUN: %clang_cc1 -target-cpu arch13 -triple s390x-ibm-linux -fno-lax-vector-conversions \
+// RUN: %clang_cc1 -target-cpu arch13 -triple s390x-ibm-linux -flax-vector-conversions=none \
 // RUN: -Wall -Wno-unused -Werror -emit-llvm %s -o - | FileCheck %s
 
 typedef __attribute__((vector_size(16))) signed char vec_schar;

test/CodeGen/builtins-systemz-zvector-error.c

@@ -1,6 +1,6 @@
 // REQUIRES: systemz-registered-target
 // RUN: %clang_cc1 -target-cpu z13 -triple s390x-linux-gnu \
-// RUN: -fzvector -fno-lax-vector-conversions \
+// RUN: -fzvector -flax-vector-conversions=none \
 // RUN: -Wall -Wno-unused -Werror -fsyntax-only -verify %s
 
 #include <vecintrin.h>

test/CodeGen/builtins-systemz-zvector.c

@@ -1,9 +1,9 @@
 // REQUIRES: systemz-registered-target
 // RUN: %clang_cc1 -target-cpu z13 -triple s390x-linux-gnu \
-// RUN: -O -fzvector -fno-lax-vector-conversions \
+// RUN: -O -fzvector -flax-vector-conversions=none \
 // RUN: -Wall -Wno-unused -Werror -emit-llvm %s -o - | FileCheck %s
 // RUN: %clang_cc1 -target-cpu z13 -triple s390x-linux-gnu \
-// RUN: -O -fzvector -fno-lax-vector-conversions \
+// RUN: -O -fzvector -flax-vector-conversions=none \
 // RUN: -Wall -Wno-unused -Werror -S %s -o - | FileCheck %s --check-prefix=CHECK-ASM
 
 #include <vecintrin.h>

test/CodeGen/builtins-systemz-zvector2-error.c

@@ -1,6 +1,6 @@
 // REQUIRES: systemz-registered-target
 // RUN: %clang_cc1 -target-cpu z14 -triple s390x-linux-gnu \
-// RUN: -fzvector -fno-lax-vector-conversions \
+// RUN: -fzvector -flax-vector-conversions=none \
 // RUN: -Wall -Wno-unused -Werror -fsyntax-only -verify %s
 
 #include <vecintrin.h>

test/CodeGen/builtins-systemz-zvector2.c

@@ -1,9 +1,9 @@
 // REQUIRES: systemz-registered-target
 // RUN: %clang_cc1 -target-cpu z14 -triple s390x-linux-gnu \
-// RUN: -O -fzvector -fno-lax-vector-conversions \
+// RUN: -O -fzvector -flax-vector-conversions=none \
 // RUN: -Wall -Wno-unused -Werror -emit-llvm %s -o - | FileCheck %s
 // RUN: %clang_cc1 -target-cpu z14 -triple s390x-linux-gnu \
-// RUN: -O -fzvector -fno-lax-vector-conversions \
+// RUN: -O -fzvector -flax-vector-conversions=none \
 // RUN: -Wall -Wno-unused -Werror -S %s -o - | FileCheck %s --check-prefix=CHECK-ASM
 
 #include <vecintrin.h>

test/CodeGen/builtins-systemz-zvector3-error.c

@@ -1,6 +1,6 @@
 // REQUIRES: systemz-registered-target
 // RUN: %clang_cc1 -target-cpu arch13 -triple s390x-linux-gnu \
-// RUN: -fzvector -fno-lax-vector-conversions \
+// RUN: -fzvector -flax-vector-conversions=none \
 // RUN: -Wall -Wno-unused -Werror -fsyntax-only -verify %s
 
 #include <vecintrin.h>

test/CodeGen/builtins-systemz-zvector3.c

@@ -1,9 +1,9 @@
 // REQUIRES: systemz-registered-target
 // RUN: %clang_cc1 -target-cpu arch13 -triple s390x-linux-gnu \
-// RUN: -O -fzvector -fno-lax-vector-conversions \
+// RUN: -O -fzvector -flax-vector-conversions=none \
 // RUN: -Wall -Wno-unused -Werror -emit-llvm %s -o - | FileCheck %s
 // RUN: %clang_cc1 -target-cpu arch13 -triple s390x-linux-gnu \
-// RUN: -O -fzvector -fno-lax-vector-conversions \
+// RUN: -O -fzvector -flax-vector-conversions=none \
 // RUN: -Wall -Wno-unused -Werror -S %s -o - | FileCheck %s --check-prefix=CHECK-ASM
 
 #include <vecintrin.h>

test/CodeGen/builtins-wasm.c

@@ -1,6 +1,6 @@
-// RUN: %clang_cc1 -triple wasm32-unknown-unknown -target-feature +unimplemented-simd128 -target-feature +nontrapping-fptoint -target-feature +exception-handling -target-feature +bulk-memory -fno-lax-vector-conversions -O3 -emit-llvm -o - %s | FileCheck %s -check-prefixes WEBASSEMBLY,WEBASSEMBLY32
-// RUN: %clang_cc1 -triple wasm64-unknown-unknown -target-feature +unimplemented-simd128 -target-feature +nontrapping-fptoint -target-feature +exception-handling -target-feature +bulk-memory -fno-lax-vector-conversions -O3 -emit-llvm -o - %s | FileCheck %s -check-prefixes WEBASSEMBLY,WEBASSEMBLY64
-// RUN: not %clang_cc1 -triple wasm64-unknown-unknown -target-feature +nontrapping-fptoint -target-feature +exception-handling -target-feature +bulk-memory -fno-lax-vector-conversions -O3 -emit-llvm -o - %s 2>&1 | FileCheck %s -check-prefixes MISSING-SIMD
+// RUN: %clang_cc1 -triple wasm32-unknown-unknown -target-feature +unimplemented-simd128 -target-feature +nontrapping-fptoint -target-feature +exception-handling -target-feature +bulk-memory -flax-vector-conversions=none -O3 -emit-llvm -o - %s | FileCheck %s -check-prefixes WEBASSEMBLY,WEBASSEMBLY32
+// RUN: %clang_cc1 -triple wasm64-unknown-unknown -target-feature +unimplemented-simd128 -target-feature +nontrapping-fptoint -target-feature +exception-handling -target-feature +bulk-memory -flax-vector-conversions=none -O3 -emit-llvm -o - %s | FileCheck %s -check-prefixes WEBASSEMBLY,WEBASSEMBLY64
+// RUN: not %clang_cc1 -triple wasm64-unknown-unknown -target-feature +nontrapping-fptoint -target-feature +exception-handling -target-feature +bulk-memory -flax-vector-conversions=none -O3 -emit-llvm -o - %s 2>&1 | FileCheck %s -check-prefixes MISSING-SIMD
 
 // SIMD convenience types
 typedef char i8x16 __attribute((vector_size(16)));

test/CodeGenCXX/builtins-systemz-zvector.cpp

@@ -1,6 +1,6 @@
 // REQUIRES: systemz-registered-target
 // RUN: %clang_cc1 -target-cpu z13 -triple s390x-linux-gnu \
-// RUN: -fzvector -fno-lax-vector-conversions -std=c++11 \
+// RUN: -fzvector -flax-vector-conversions=none -std=c++11 \
 // RUN: -Wall -Wno-unused -Werror -emit-llvm %s -o - | FileCheck %s
 
 bool gb;

test/Headers/altivec-header.c

@@ -1,5 +1,5 @@
 // RUN: %clang_cc1 -triple powerpc64-unknown-unknown -target-feature +altivec -ffreestanding -emit-llvm -o - %s | FileCheck %s
-// RUN: %clang_cc1 -triple powerpc64-unknown-unknown -target-feature +altivec -ffreestanding -emit-llvm -fno-lax-vector-conversions -o - %s | FileCheck %s
+// RUN: %clang_cc1 -triple powerpc64-unknown-unknown -target-feature +altivec -ffreestanding -emit-llvm -flax-vector-conversions=none -o - %s | FileCheck %s
 // RUN: %clang_cc1 -triple powerpc64-unknown-unknown -target-feature +altivec -ffreestanding -emit-llvm -x c++ -o - %s | FileCheck %s
 
 #include <altivec.h>

test/Headers/arm-neon-header.c

@@ -1,5 +1,5 @@
 // RUN: %clang_cc1 -triple thumbv7-apple-darwin10 -target-cpu cortex-a8 -fsyntax-only -Wvector-conversions -ffreestanding %s
-// RUN: %clang_cc1 -triple thumbv7-apple-darwin10 -target-cpu cortex-a8 -fsyntax-only -fno-lax-vector-conversions -ffreestanding %s
+// RUN: %clang_cc1 -triple thumbv7-apple-darwin10 -target-cpu cortex-a8 -fsyntax-only -flax-vector-conversions=none -ffreestanding %s
 // RUN: %clang_cc1 -x c++ -triple thumbv7-apple-darwin10 -target-cpu cortex-a8 -fsyntax-only -Wvector-conversions -ffreestanding %s
 
 // RUN: %clang -fsyntax-only               -ffreestanding --target=aarch64-none-eabi -march=armv8.2-a+fp16 -std=c89 -xc %s

test/Headers/x86-intrinsics-headers-clean.cpp

@@ -1,7 +1,7 @@
 // Make sure the intrinsic headers compile cleanly with no warnings or errors.
 
 // RUN: %clang_cc1 -ffreestanding -triple x86_64-unknown-unknown -Wsystem-headers \
-// RUN:   -fsyntax-only -fno-lax-vector-conversions -x c++ -verify %s
+// RUN:   -fsyntax-only -flax-vector-conversions=none -x c++ -verify %s
 
 // expected-no-diagnostics
 

test/Headers/x86-intrinsics-headers.c

@@ -1,5 +1,5 @@
 // RUN: %clang_cc1 -fsyntax-only -ffreestanding %s
-// RUN: %clang_cc1 -fsyntax-only -ffreestanding -fno-lax-vector-conversions %s
+// RUN: %clang_cc1 -fsyntax-only -ffreestanding -flax-vector-conversions=none %s
 // RUN: %clang_cc1 -fsyntax-only -ffreestanding -x c++ %s
 
 #if defined(i386) || defined(__x86_64__)

test/Headers/x86intrin-2.c

@@ -1,5 +1,5 @@
 // RUN: %clang_cc1 -fsyntax-only -ffreestanding %s -verify
-// RUN: %clang_cc1 -fsyntax-only -ffreestanding -fno-lax-vector-conversions %s -verify
+// RUN: %clang_cc1 -fsyntax-only -ffreestanding -flax-vector-conversions=none %s -verify
 // RUN: %clang_cc1 -fsyntax-only -ffreestanding -x c++ %s -verify
 // expected-no-diagnostics
 

test/Headers/x86intrin.c

@@ -1,5 +1,5 @@
 // RUN: %clang_cc1 -fsyntax-only -ffreestanding %s -verify
-// RUN: %clang_cc1 -fsyntax-only -ffreestanding -fno-lax-vector-conversions %s -verify
+// RUN: %clang_cc1 -fsyntax-only -ffreestanding -flax-vector-conversions=none %s -verify
 // RUN: %clang_cc1 -fsyntax-only -ffreestanding -x c++ %s -verify
 // expected-no-diagnostics
 

test/Sema/ext_vector_casts.c

@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -triple x86_64-apple-macos10.7.0 -fsyntax-only -verify -fno-lax-vector-conversions -Wconversion %s
+// RUN: %clang_cc1 -triple x86_64-apple-macos10.7.0 -fsyntax-only -verify -flax-vector-conversions=none -Wconversion %s
 
 typedef __attribute__((ext_vector_type(8))) _Bool BoolVector; // expected-error {{invalid vector element type '_Bool'}}
 

test/Sema/typedef-retain.c

@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -fsyntax-only -verify %s -fno-lax-vector-conversions
+// RUN: %clang_cc1 -fsyntax-only -verify %s -flax-vector-conversions=none
 
 typedef float float4 __attribute__((vector_size(16)));
 typedef int int4 __attribute__((vector_size(16)));

test/Sema/zvector.c

@@ -1,5 +1,5 @@
 // RUN: %clang_cc1 -triple s390x-linux-gnu -fzvector \
-// RUN:  -fno-lax-vector-conversions -W -Wall -Wconversion \
+// RUN:  -flax-vector-conversions=none -W -Wall -Wconversion \
 // RUN:  -Werror -fsyntax-only -verify %s
 
 vector signed char sc, sc2;

test/Sema/zvector2.c

@@ -1,5 +1,5 @@
 // RUN: %clang_cc1 -triple s390x-linux-gnu -fzvector -target-cpu z14 \
-// RUN:  -fno-lax-vector-conversions -W -Wall -Wconversion \
+// RUN:  -flax-vector-conversions=none -W -Wall -Wconversion \
 // RUN:  -Werror -fsyntax-only -verify %s
 
 vector signed char sc, sc2;

test/SemaCXX/altivec.cpp

@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -target-feature +altivec -fno-lax-vector-conversions -triple powerpc-unknown-unknown -fcxx-exceptions -verify %s
+// RUN: %clang_cc1 -target-feature +altivec -flax-vector-conversions=none -triple powerpc-unknown-unknown -fcxx-exceptions -verify %s
 
 typedef int V4i __attribute__((vector_size(16)));
 

test/SemaCXX/vector-no-lax.cpp

@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fsyntax-only -fno-lax-vector-conversions -verify %s
+// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fsyntax-only -flax-vector-conversions=none -verify %s
 typedef unsigned int __attribute__((vector_size (16))) vUInt32;
 typedef int __attribute__((vector_size (16))) vSInt32;
 

test/SemaCXX/vector.cpp

@@ -1,6 +1,8 @@
-// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fsyntax-only -verify %s
-// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fsyntax-only -verify -std=c++98 %s
-// RUN: %clang_cc1 -triple x86_64-apple-darwin10 -fsyntax-only -verify -std=c++11 %s
+// RUN: %clang_cc1 -flax-vector-conversions=all -triple x86_64-apple-darwin10 -fsyntax-only -verify %s
+// RUN: %clang_cc1 -flax-vector-conversions=all -triple x86_64-apple-darwin10 -fsyntax-only -verify -std=c++98 %s
+// RUN: %clang_cc1 -flax-vector-conversions=all -triple x86_64-apple-darwin10 -fsyntax-only -verify -std=c++11 %s
+// RUN: %clang_cc1 -flax-vector-conversions=integer -triple x86_64-apple-darwin10 -fsyntax-only -verify %s -DNO_LAX_FLOAT
+// RUN: %clang_cc1 -flax-vector-conversions=none -triple x86_64-apple-darwin10 -fsyntax-only -verify %s -DNO_LAX_FLOAT -DNO_LAX_INT
 
 typedef char char16 __attribute__ ((__vector_size__ (16)));
 typedef long long longlong16 __attribute__ ((__vector_size__ (16)));
@@ -8,13 +10,19 @@ typedef char char16_e __attribute__ ((__ext_vector_type__ (16)));
 typedef long long longlong16_e __attribute__ ((__ext_vector_type__ (2)));
 
 // Test overloading and function calls with vector types.
-void f0(char16);
+void f0(char16); // expected-note 0+{{candidate}}
 
 void f0_test(char16 c16, longlong16 ll16, char16_e c16e, longlong16_e ll16e) {
   f0(c16);
   f0(ll16);
+#ifdef NO_LAX_INT
+  // expected-error@-2 {{no matching function}}
+#endif
   f0(c16e);
   f0(ll16e);
+#ifdef NO_LAX_INT
+  // expected-error@-2 {{no matching function}}
+#endif
 }
 
 int &f1(char16);
@@ -27,12 +35,14 @@ void f1_test(char16 c16, longlong16 ll16, char16_e c16e, longlong16_e ll16e) {
   float &fr2 = f1(ll16e);
 }
 
-void f2(char16_e); // expected-note{{no known conversion from 'longlong16_e' (vector of 2 'long long' values) to 'char16_e' (vector of 16 'char' values) for 1st argument}} \
-       // expected-note{{candidate function not viable: no known conversion from 'convertible_to<longlong16_e>' to 'char16_e' (vector of 16 'char' values) for 1st argument}}
+void f2(char16_e); // expected-note 0+{{candidate}}
 
 void f2_test(char16 c16, longlong16 ll16, char16_e c16e, longlong16_e ll16e) {
   f2(c16);
   f2(ll16);
+#ifdef NO_LAX_INT
+  // expected-error@-2 {{no matching function}}
+#endif
   f2(c16e);
   f2(ll16e); // expected-error{{no matching function}}
   f2('a');
@@ -58,6 +68,11 @@ void conditional(bool Cond, char16 c16, longlong16 ll16, char16_e c16e,
   (void)(Cond? c16 : ll16);
   (void)(Cond? ll16e : c16e);
   (void)(Cond? ll16e : c16);
+#ifdef NO_LAX_INT
+  // expected-error@-4 {{cannot convert}}
+  // expected-error@-4 {{cannot convert}}
+  // expected-error@-4 {{cannot convert}}
+#endif
 }
 
 // Test C++ cast'ing of vector types.
@@ -85,9 +100,16 @@ void casts(longlong16 ll16, longlong16_e ll16e) {
   // static_cast
   (void)static_cast<char16>(ll16);
   (void)static_cast<char16_e>(ll16);
+#ifdef NO_LAX_INT
+  // expected-error@-3 {{not allowed}}
+  // expected-error@-3 {{not allowed}}
+#endif
   (void)static_cast<longlong16>(ll16);
   (void)static_cast<longlong16_e>(ll16);
   (void)static_cast<char16>(ll16e);
+#ifdef NO_LAX_INT
+  // expected-error@-2 {{not allowed}}
+#endif
   (void)static_cast<char16_e>(ll16e); // expected-error{{static_cast from 'longlong16_e' (vector of 2 'long long' values) to 'char16_e' (vector of 16 'char' values) is not allowed}}
   (void)static_cast<longlong16>(ll16e);
   (void)static_cast<longlong16_e>(ll16e);
@@ -121,10 +143,19 @@ void test_implicit_conversions(bool Cond, char16 c16, longlong16 ll16,
                                convertible_to<char16_e&> rto_c16e) {
   f0(to_c16);
   f0(to_ll16);
+#ifdef NO_LAX_INT
+  // expected-error@-2 {{no matching function}}
+#endif
   f0(to_c16e);
   f0(to_ll16e);
+#ifdef NO_LAX_INT
+  // expected-error@-2 {{no matching function}}
+#endif
   f2(to_c16);
   f2(to_ll16);
+#ifdef NO_LAX_INT
+  // expected-error@-2 {{no matching function}}
+#endif
   f2(to_c16e);
   f2(to_ll16e); // expected-error{{no matching function}}
 
@@ -193,6 +224,10 @@ void test_implicit_conversions(bool Cond, char16 c16, longlong16 ll16,
   // These 2 are convertible with -flax-vector-conversions (default)
   (void)(Cond? to_c16 : to_ll16);
   (void)(Cond? to_c16e : to_ll16e);
+#ifdef NO_LAX_INT
+  // expected-error@-3 {{cannot convert}}
+  // expected-error@-3 {{cannot convert}}
+#endif
 }
 
 typedef float fltx2 __attribute__((__vector_size__(8)));
@@ -203,6 +238,10 @@ typedef double dblx4 __attribute__((__vector_size__(32)));
 void accept_fltx2(fltx2); // expected-note{{candidate function not viable: no known conversion from 'double' to 'fltx2' (vector of 2 'float' values) for 1st argument}}
 void accept_fltx4(fltx4);
 void accept_dblx2(dblx2);
+#ifdef NO_LAX_FLOAT
+// expected-note@-3 {{no known conversion}}
+// expected-note@-3 {{no known conversion}}
+#endif
 void accept_dblx4(dblx4);
 void accept_bool(bool); // expected-note{{candidate function not viable: no known conversion from 'fltx2' (vector of 2 'float' values) to 'bool' for 1st argument}}
 
@@ -214,9 +253,12 @@ void test(fltx2 fltx2_val, fltx4 fltx4_val, dblx2 dblx2_val, dblx4 dblx4_val) {
   accept_dblx4(dblx4_val);
 
   // Same-size conversions
-  // FIXME: G++ rejects these conversions, we accept them. Revisit this!
   accept_fltx4(dblx2_val);
   accept_dblx2(fltx4_val);
+#ifdef NO_LAX_FLOAT
+  // expected-error@-3 {{no matching function}}
+  // expected-error@-3 {{no matching function}}
+#endif
 
   // Conversion to bool.
   accept_bool(fltx2_val); // expected-error{{no matching function for call to 'accept_bool'}}
@@ -227,9 +269,9 @@ void test(fltx2 fltx2_val, fltx4 fltx4_val, dblx2 dblx2_val, dblx4 dblx4_val) {
 
 typedef int intx4 __attribute__((__vector_size__(16)));
 typedef int inte4 __attribute__((__ext_vector_type__(4)));
-typedef int flte4 __attribute__((__ext_vector_type__(4)));
+typedef float flte4 __attribute__((__ext_vector_type__(4)));
 
-void test_mixed_vector_types(fltx4 f, intx4 n, flte4 g, flte4 m) {
+void test_mixed_vector_types(fltx4 f, intx4 n, flte4 g, inte4 m) {
   (void)(f == g);
   (void)(g != f);
   (void)(f <= g);
@@ -295,40 +337,40 @@ typedef bool bad __attribute__((__vector_size__(16)));  // expected-error {{inva
 namespace Templates {
 template <typename Elt, unsigned Size>
 struct TemplateVectorType {
-  typedef Elt __attribute__((__vector_size__(Size))) type;
+  typedef Elt __attribute__((__vector_size__(Size))) type; // #1
 };
 
 template <int N, typename T>
 struct PR15730 {
   typedef T __attribute__((vector_size(N * sizeof(T)))) type;
-  typedef T __attribute__((vector_size(8192))) type2;
-  typedef T __attribute__((vector_size(3))) type3;
+  typedef T __attribute__((vector_size(8192))) type2; // #2
+  typedef T __attribute__((vector_size(3))) type3; // #3
 };
 
 void Init() {
   const TemplateVectorType<float, 32>::type Works = {};
   const TemplateVectorType<int, 32>::type Works2 = {};
-  // expected-error@298 {{invalid vector element type 'bool'}}
+  // expected-error@#1 {{invalid vector element type 'bool'}}
   // expected-note@+1 {{in instantiation of template class 'Templates::TemplateVectorType<bool, 32>' requested here}}
   const TemplateVectorType<bool, 32>::type NoBool;
-  // expected-error@298 {{invalid vector element type 'int __attribute__((ext_vector_type(4)))' (vector of 4 'int' values)}}
+  // expected-error@#1 {{invalid vector element type 'int __attribute__((ext_vector_type(4)))' (vector of 4 'int' values)}}
   // expected-note@+1 {{in instantiation of template class 'Templates::TemplateVectorType<int __attribute__((ext_vector_type(4))), 32>' requested here}}
   const TemplateVectorType<vi4, 32>::type NoComplex;
-  // expected-error@298 {{vector size not an integral multiple of component size}}
+  // expected-error@#1 {{vector size not an integral multiple of component size}}
   // expected-note@+1 {{in instantiation of template class 'Templates::TemplateVectorType<int, 33>' requested here}}
   const TemplateVectorType<int, 33>::type BadSize;
-  // expected-error@298 {{vector size too large}}
+  // expected-error@#1 {{vector size too large}}
   // expected-note@+1 {{in instantiation of template class 'Templates::TemplateVectorType<int, 8192>' requested here}}
   const TemplateVectorType<int, 8192>::type TooLarge;
-  // expected-error@298 {{zero vector size}}
+  // expected-error@#1 {{zero vector size}}
   // expected-note@+1 {{in instantiation of template class 'Templates::TemplateVectorType<int, 0>' requested here}}
   const TemplateVectorType<int, 0>::type Zero;
 
-  // expected-error@304 {{vector size too large}}
-  // expected-error@305 {{vector size not an integral multiple of component size}}
+  // expected-error@#2 {{vector size too large}}
+  // expected-error@#3 {{vector size not an integral multiple of component size}}
   // expected-note@+1 {{in instantiation of template class 'Templates::PR15730<8, int>' requested here}}
   const PR15730<8, int>::type PR15730_1 = {};
-  // expected-error@304 {{vector size too large}}
+  // expected-error@#2 {{vector size too large}}
   // expected-note@+1 {{in instantiation of template class 'Templates::PR15730<8, char>' requested here}}
   const PR15730<8, char>::type2 PR15730_2 = {};
 }