From 699ae0c173bd9f9a38523a7de354f5e9cc602ecc Mon Sep 17 00:00:00 2001 From: Craig Topper Date: Thu, 10 Aug 2017 20:28:30 +0000 Subject: [X86] Implement __builtin_cpu_is This patch adds support for __builtin_cpu_is. I've tried to match the strings supported to the latest version of gcc. Differential Revision: https://reviews.llvm.org/D35449 llvm-svn: 310657 --- clang/lib/Sema/SemaChecking.cpp | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) (limited to 'clang/lib/Sema/SemaChecking.cpp') diff --git a/clang/lib/Sema/SemaChecking.cpp b/clang/lib/Sema/SemaChecking.cpp index 0112bffa29b..e75c15a37cd 100644 --- a/clang/lib/Sema/SemaChecking.cpp +++ b/clang/lib/Sema/SemaChecking.cpp @@ -1841,6 +1841,26 @@ static bool SemaBuiltinCpuSupports(Sema &S, CallExpr *TheCall) { return false; } +/// SemaBuiltinCpuIs - Handle __builtin_cpu_is(char *). +/// This checks that the target supports __builtin_cpu_is and +/// that the string argument is constant and valid. +static bool SemaBuiltinCpuIs(Sema &S, CallExpr *TheCall) { + Expr *Arg = TheCall->getArg(0); + + // Check if the argument is a string literal. + if (!isa(Arg->IgnoreParenImpCasts())) + return S.Diag(TheCall->getLocStart(), diag::err_expr_not_string_literal) + << Arg->getSourceRange(); + + // Check the contents of the string. + StringRef Feature = + cast(Arg->IgnoreParenImpCasts())->getString(); + if (!S.Context.getTargetInfo().validateCpuIs(Feature)) + return S.Diag(TheCall->getLocStart(), diag::err_invalid_cpu_is) + << Arg->getSourceRange(); + return false; +} + // Check if the rounding mode is legal. bool Sema::CheckX86BuiltinRoundingOrSAE(unsigned BuiltinID, CallExpr *TheCall) { // Indicates if this instruction has rounding control or just SAE. @@ -2154,6 +2174,9 @@ bool Sema::CheckX86BuiltinFunctionCall(unsigned BuiltinID, CallExpr *TheCall) { if (BuiltinID == X86::BI__builtin_cpu_supports) return SemaBuiltinCpuSupports(*this, TheCall); + if (BuiltinID == X86::BI__builtin_cpu_is) + return SemaBuiltinCpuIs(*this, TheCall); + // If the intrinsic has rounding or SAE make sure its valid. if (CheckX86BuiltinRoundingOrSAE(BuiltinID, TheCall)) return true; -- cgit v1.2.3