[X86][AVX10] Make warning message more informative, NFCI (#134528)

Author: phoebewang

Diff for: clang/lib/Driver/ToolChains/Arch/X86.cpp

@@ -252,7 +252,9 @@ void x86::getX86TargetFeatures(const Driver &D, const llvm::Triple &Triple,
         D.Diag(diag::warn_drv_deprecated_arg) << Name << 1 << Name.drop_back(4);
       else if (Width == "256")
         D.Diag(diag::warn_drv_deprecated_custom)
-            << Name << "because AVX10/256 is not supported and will be removed";
+            << Name
+            << "no alternative argument provided because "
+               "AVX10/256 is not supported and will be removed";
       else
         assert((Width == "256" || Width == "512") && "Invalid vector length.");
       Features.push_back(Args.MakeArgString((IsNegative ? "-" : "+") + Name));
@@ -286,7 +288,9 @@ void x86::getX86TargetFeatures(const Driver &D, const llvm::Triple &Triple,
     if (A->getOption().matches(options::OPT_mevex512) ||
         A->getOption().matches(options::OPT_mno_evex512))
       D.Diag(diag::warn_drv_deprecated_custom)
-          << Name << "because AVX10/256 is not supported and will be removed";
+          << Name
+          << "no alternative argument provided because "
+             "AVX10/256 is not supported and will be removed";
 
     if (A->getOption().matches(options::OPT_mapx_features_EQ) ||
         A->getOption().matches(options::OPT_mno_apx_features_EQ)) {

Diff for: clang/test/Driver/x86-target-features.c

@@ -411,8 +411,8 @@
 // RUN: %clang --target=i386 -mavx10.2-512 %s -### -o %t.o 2>&1 | FileCheck -check-prefixes=AVX10_2_512,WARN-AVX10-512 %s
 // RUN: %clang --target=i386 -mavx10.2-256 -mavx10.1-512 %s -### -o %t.o 2>&1 | FileCheck -check-prefixes=AVX10_2_256,AVX10_1_512 %s
 // RUN: %clang --target=i386 -mavx10.2-512 -mavx10.1-256 %s -### -o %t.o 2>&1 | FileCheck -check-prefixes=AVX10_2_512,AVX10_1_256 %s
-// WARN-EVEX512: warning: argument '{{.*}}evex512' is deprecated, because AVX10/256 is not supported and will be removed [-Wdeprecated]
-// WARN-AVX10-256: warning: argument 'avx10.{{.*}}-256' is deprecated, because AVX10/256 is not supported and will be removed [-Wdeprecated]
+// WARN-EVEX512: warning: argument '{{.*}}evex512' is deprecated, no alternative argument provided because AVX10/256 is not supported and will be removed [-Wdeprecated]
+// WARN-AVX10-256: warning: argument 'avx10.{{.*}}-256' is deprecated, no alternative argument provided because AVX10/256 is not supported and will be removed [-Wdeprecated]
 // WARN-AVX10-512: warning: argument 'avx10.{{.*}}-512' is deprecated, use 'avx10.{{.*}}' instead [-Wdeprecated]
 // EVEX512: "-target-feature" "+evex512"
 // NO-EVEX512: "-target-feature" "-evex512"