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-rw-r--r--lib/Driver/ToolChains/Arch/RISCV.cpp311
1 files changed, 167 insertions, 144 deletions
diff --git a/lib/Driver/ToolChains/Arch/RISCV.cpp b/lib/Driver/ToolChains/Arch/RISCV.cpp
index b6768de4d299..624788a5874e 100644
--- a/lib/Driver/ToolChains/Arch/RISCV.cpp
+++ b/lib/Driver/ToolChains/Arch/RISCV.cpp
@@ -12,6 +12,7 @@
#include "clang/Driver/DriverDiagnostic.h"
#include "clang/Driver/Options.h"
#include "llvm/Option/ArgList.h"
+#include "llvm/ADT/Optional.h"
#include "llvm/Support/TargetParser.h"
#include "llvm/Support/raw_ostream.h"
#include "ToolChains/CommonArgs.h"
@@ -189,168 +190,182 @@ static void getExtensionFeatures(const Driver &D,
}
}
-void riscv::getRISCVTargetFeatures(const Driver &D, const ArgList &Args,
- std::vector<StringRef> &Features) {
- if (const Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
- StringRef MArch = A->getValue();
+// Returns false if an error is diagnosed.
+static bool getArchFeatures(const Driver &D, StringRef MArch,
+ std::vector<StringRef> &Features,
+ const ArgList &Args) {
+ // RISC-V ISA strings must be lowercase.
+ if (llvm::any_of(MArch, [](char c) { return isupper(c); })) {
+ D.Diag(diag::err_drv_invalid_riscv_arch_name)
+ << MArch << "string must be lowercase";
+ return false;
+ }
- // RISC-V ISA strings must be lowercase.
- if (llvm::any_of(MArch, [](char c) { return isupper(c); })) {
- D.Diag(diag::err_drv_invalid_riscv_arch_name)
- << MArch << "string must be lowercase";
- return;
- }
+ // ISA string must begin with rv32 or rv64.
+ if (!(MArch.startswith("rv32") || MArch.startswith("rv64")) ||
+ (MArch.size() < 5)) {
+ D.Diag(diag::err_drv_invalid_riscv_arch_name)
+ << MArch << "string must begin with rv32{i,e,g} or rv64{i,g}";
+ return false;
+ }
- // ISA string must begin with rv32 or rv64.
- if (!(MArch.startswith("rv32") || MArch.startswith("rv64")) ||
- (MArch.size() < 5)) {
- D.Diag(diag::err_drv_invalid_riscv_arch_name) << MArch
- << "string must begin with rv32{i,e,g} or rv64{i,g}";
- return;
- }
+ bool HasRV64 = MArch.startswith("rv64");
+
+ // The canonical order specified in ISA manual.
+ // Ref: Table 22.1 in RISC-V User-Level ISA V2.2
+ StringRef StdExts = "mafdqlcbjtpvn";
+ bool HasF = false, HasD = false;
+ char Baseline = MArch[4];
+
+ // First letter should be 'e', 'i' or 'g'.
+ switch (Baseline) {
+ default:
+ D.Diag(diag::err_drv_invalid_riscv_arch_name)
+ << MArch << "first letter should be 'e', 'i' or 'g'";
+ return false;
+ case 'e': {
+ StringRef Error;
+ // Currently LLVM does not support 'e'.
+ // Extension 'e' is not allowed in rv64.
+ if (HasRV64)
+ Error = "standard user-level extension 'e' requires 'rv32'";
+ else
+ Error = "unsupported standard user-level extension 'e'";
+ D.Diag(diag::err_drv_invalid_riscv_arch_name) << MArch << Error;
+ return false;
+ }
+ case 'i':
+ break;
+ case 'g':
+ // g = imafd
+ StdExts = StdExts.drop_front(4);
+ Features.push_back("+m");
+ Features.push_back("+a");
+ Features.push_back("+f");
+ Features.push_back("+d");
+ HasF = true;
+ HasD = true;
+ break;
+ }
- bool HasRV64 = MArch.startswith("rv64");
+ // Skip rvxxx
+ StringRef Exts = MArch.substr(5);
+
+ // Remove non-standard extensions and supervisor-level extensions.
+ // They have 'x', 's', 'sx' prefixes. Parse them at the end.
+ // Find the very first occurrence of 's' or 'x'.
+ StringRef OtherExts;
+ size_t Pos = Exts.find_first_of("sx");
+ if (Pos != StringRef::npos) {
+ OtherExts = Exts.substr(Pos);
+ Exts = Exts.substr(0, Pos);
+ }
- // The canonical order specified in ISA manual.
- // Ref: Table 22.1 in RISC-V User-Level ISA V2.2
- StringRef StdExts = "mafdqlcbjtpvn";
- bool HasF = false, HasD = false;
- char Baseline = MArch[4];
+ std::string Major, Minor;
+ if (!getExtensionVersion(D, MArch, std::string(1, Baseline), Exts, Major,
+ Minor))
+ return false;
- // First letter should be 'e', 'i' or 'g'.
- switch (Baseline) {
- default:
- D.Diag(diag::err_drv_invalid_riscv_arch_name) << MArch
- << "first letter should be 'e', 'i' or 'g'";
- return;
- case 'e': {
+ // TODO: Use version number when setting target features
+ // and consume the underscore '_' that might follow.
+
+ auto StdExtsItr = StdExts.begin();
+ auto StdExtsEnd = StdExts.end();
+
+ for (auto I = Exts.begin(), E = Exts.end(); I != E; ++I) {
+ char c = *I;
+
+ // Check ISA extensions are specified in the canonical order.
+ while (StdExtsItr != StdExtsEnd && *StdExtsItr != c)
+ ++StdExtsItr;
+
+ if (StdExtsItr == StdExtsEnd) {
+ // Either c contains a valid extension but it was not given in
+ // canonical order or it is an invalid extension.
StringRef Error;
- // Currently LLVM does not support 'e'.
- // Extension 'e' is not allowed in rv64.
- if (HasRV64)
- Error = "standard user-level extension 'e' requires 'rv32'";
+ if (StdExts.contains(c))
+ Error = "standard user-level extension not given in canonical order";
else
- Error = "unsupported standard user-level extension 'e'";
- D.Diag(diag::err_drv_invalid_riscv_arch_name)
- << MArch << Error;
- return;
+ Error = "invalid standard user-level extension";
+ D.Diag(diag::err_drv_invalid_riscv_ext_arch_name)
+ << MArch << Error << std::string(1, c);
+ return false;
}
- case 'i':
- break;
- case 'g':
- // g = imafd
- StdExts = StdExts.drop_front(4);
+
+ // Move to next char to prevent repeated letter.
+ ++StdExtsItr;
+
+ if (std::next(I) != E) {
+ // Skip c.
+ std::string Next = std::string(std::next(I), E);
+ std::string Major, Minor;
+ if (!getExtensionVersion(D, MArch, std::string(1, c), Next, Major, Minor))
+ return false;
+
+ // TODO: Use version number when setting target features
+ // and consume the underscore '_' that might follow.
+ }
+
+ // The order is OK, then push it into features.
+ switch (c) {
+ default:
+ // Currently LLVM supports only "mafdc".
+ D.Diag(diag::err_drv_invalid_riscv_ext_arch_name)
+ << MArch << "unsupported standard user-level extension"
+ << std::string(1, c);
+ return false;
+ case 'm':
Features.push_back("+m");
+ break;
+ case 'a':
Features.push_back("+a");
+ break;
+ case 'f':
Features.push_back("+f");
- Features.push_back("+d");
HasF = true;
+ break;
+ case 'd':
+ Features.push_back("+d");
HasD = true;
break;
+ case 'c':
+ Features.push_back("+c");
+ break;
}
+ }
- // Skip rvxxx
- StringRef Exts = MArch.substr(5);
-
- // Remove non-standard extensions and supervisor-level extensions.
- // They have 'x', 's', 'sx' prefixes. Parse them at the end.
- // Find the very first occurrence of 's' or 'x'.
- StringRef OtherExts;
- size_t Pos = Exts.find_first_of("sx");
- if (Pos != StringRef::npos) {
- OtherExts = Exts.substr(Pos);
- Exts = Exts.substr(0, Pos);
- }
-
- std::string Major, Minor;
- if (!getExtensionVersion(D, MArch, std::string(1, Baseline),
- Exts, Major, Minor))
- return;
-
- // TODO: Use version number when setting target features
- // and consume the underscore '_' that might follow.
-
- auto StdExtsItr = StdExts.begin();
- auto StdExtsEnd = StdExts.end();
-
- for (auto I = Exts.begin(), E = Exts.end(); I != E; ++I) {
- char c = *I;
-
- // Check ISA extensions are specified in the canonical order.
- while (StdExtsItr != StdExtsEnd && *StdExtsItr != c)
- ++StdExtsItr;
-
- if (StdExtsItr == StdExtsEnd) {
- // Either c contains a valid extension but it was not given in
- // canonical order or it is an invalid extension.
- StringRef Error;
- if (StdExts.contains(c))
- Error = "standard user-level extension not given in canonical order";
- else
- Error = "invalid standard user-level extension";
- D.Diag(diag::err_drv_invalid_riscv_ext_arch_name)
- << MArch << Error << std::string(1, c);
- return;
- }
-
- // Move to next char to prevent repeated letter.
- ++StdExtsItr;
+ // Dependency check.
+ // It's illegal to specify the 'd' (double-precision floating point)
+ // extension without also specifying the 'f' (single precision
+ // floating-point) extension.
+ if (HasD && !HasF) {
+ D.Diag(diag::err_drv_invalid_riscv_arch_name)
+ << MArch << "d requires f extension to also be specified";
+ return false;
+ }
- if (std::next(I) != E) {
- // Skip c.
- std::string Next = std::string(std::next(I), E);
- std::string Major, Minor;
- if (!getExtensionVersion(D, MArch, std::string(1, c),
- Next, Major, Minor))
- return;
-
- // TODO: Use version number when setting target features
- // and consume the underscore '_' that might follow.
- }
-
- // The order is OK, then push it into features.
- switch (c) {
- default:
- // Currently LLVM supports only "mafdc".
- D.Diag(diag::err_drv_invalid_riscv_ext_arch_name)
- << MArch << "unsupported standard user-level extension"
- << std::string(1, c);
- return;
- case 'm':
- Features.push_back("+m");
- break;
- case 'a':
- Features.push_back("+a");
- break;
- case 'f':
- Features.push_back("+f");
- HasF = true;
- break;
- case 'd':
- Features.push_back("+d");
- HasD = true;
- break;
- case 'c':
- Features.push_back("+c");
- break;
- }
- }
+ // Additional dependency checks.
+ // TODO: The 'q' extension requires rv64.
+ // TODO: It is illegal to specify 'e' extensions with 'f' and 'd'.
- // Dependency check.
- // It's illegal to specify the 'd' (double-precision floating point)
- // extension without also specifying the 'f' (single precision
- // floating-point) extension.
- if (HasD && !HasF)
- D.Diag(diag::err_drv_invalid_riscv_arch_name) << MArch
- << "d requires f extension to also be specified";
+ // Handle all other types of extensions.
+ getExtensionFeatures(D, Args, Features, MArch, OtherExts);
- // Additional dependency checks.
- // TODO: The 'q' extension requires rv64.
- // TODO: It is illegal to specify 'e' extensions with 'f' and 'd'.
+ return true;
+}
- // Handle all other types of extensions.
- getExtensionFeatures(D, Args, Features, MArch, OtherExts);
- }
+void riscv::getRISCVTargetFeatures(const Driver &D, const llvm::Triple &Triple,
+ const ArgList &Args,
+ std::vector<StringRef> &Features) {
+ llvm::Optional<StringRef> MArch;
+ if (const Arg *A = Args.getLastArg(options::OPT_march_EQ))
+ MArch = A->getValue();
+ else if (Triple.getOS() == llvm::Triple::Linux)
+ // RISC-V Linux defaults to rv{32,64}gc.
+ MArch = Triple.getArch() == llvm::Triple::riscv32 ? "rv32gc" : "rv64gc";
+
+ if (MArch.hasValue() && !getArchFeatures(D, *MArch, Features, Args))
+ return;
// -mrelax is default, unless -mno-relax is specified.
if (Args.hasFlag(options::OPT_mrelax, options::OPT_mno_relax, true))
@@ -372,8 +387,16 @@ void riscv::getRISCVTargetFeatures(const Driver &D, const ArgList &Args,
}
StringRef riscv::getRISCVABI(const ArgList &Args, const llvm::Triple &Triple) {
- if (Arg *A = Args.getLastArg(options::OPT_mabi_EQ))
+ assert((Triple.getArch() == llvm::Triple::riscv32 ||
+ Triple.getArch() == llvm::Triple::riscv64) &&
+ "Unexpected triple");
+
+ if (const Arg *A = Args.getLastArg(options::OPT_mabi_EQ))
return A->getValue();
- return Triple.getArch() == llvm::Triple::riscv32 ? "ilp32" : "lp64";
+ // RISC-V Linux defaults to ilp32d/lp64d
+ if (Triple.getOS() == llvm::Triple::Linux)
+ return Triple.getArch() == llvm::Triple::riscv32 ? "ilp32d" : "lp64d";
+ else
+ return Triple.getArch() == llvm::Triple::riscv32 ? "ilp32" : "lp64";
}