rengolin added a reviewer: rnk.
rengolin removed rL LLVM as the repository for this revision.
rengolin updated this revision to Diff 29658.
rengolin added a comment.
More info.
http://reviews.llvm.org/D11148
Files:
lib/Driver/Tools.cpp
test/Driver/arm-ias-Wa.s
Index: test/Driver/arm-ias-Wa.s
===================================================================
--- /dev/null
+++ test/Driver/arm-ias-Wa.s
@@ -0,0 +1,44 @@
+// Test that different values of -Wa,-mcpu/mfpu/march/mhwdiv pick correct ARM target-feature(s).
+// Complete tests about -mcpu/mfpu/march/mhwdiv on other files.
+
+// CHECK: "cc1as"
+// ================================================================= CPU
+// RUN: %clang -target arm-linux-gnueabi -Wa,-mcpu=cortex-a15 -### -c %s 2>&1 \
+// RUN: | FileCheck -check-prefix=CHECK-CPU %s
+// CHECK-CPU: "-target-cpu" "cortex-a15"
+
+// RUN: %clang -target arm -Wa,-mcpu=bogus -### -c %s 2>&1 \
+// RUN: | FileCheck -check-prefix=CHECK-BOGUS-CPU %s
+// CHECK-BOGUS-CPU: error: {{.*}} does not support '-Wa,-mcpu=bogus'
+
+// ================================================================= FPU
+// RUN: %clang -target arm-linux-eabi -Wa,-mfpu=neon %s -### -o %t.o 2>&1 \
+// RUN: | FileCheck --check-prefix=CHECK-NEON %s
+// CHECK-NEON: "-target-feature" "+neon"
+
+// RUN: %clang -target arm-linux-eabi -Wa,-mfpu=bogus %s -### -o %t.o 2>&1 \
+// RUN: | FileCheck --check-prefix=CHECK-BOGUS-FPU %s
+// CHECK-BOGUS-FPU: error: {{.*}} does not support '-Wa,-mfpu=bogus'
+
+// ================================================================= Arch
+// Arch validation only for now, in case we're passing to an external asm
+
+// RUN: %clang -target arm -Wa,-march=armbogusv6 -### -c %s 2>&1 \
+// RUN: | FileCheck -check-prefix=CHECK-BOGUS %s
+// CHECK-BOGUS: error: {{.*}} does not support '-Wa,-march=armbogusv6'
+
+// ================================================================= HD Div
+// RUN: %clang -### -target arm %s -Wa,-mhwdiv=arm -o %t.o 2>&1 \
+// RUN: | FileCheck --check-prefix=CHECK-ARM %s
+// CHECK-ARM: "-target-feature" "+hwdiv-arm"
+// CHECK-ARM: "-target-feature" "-hwdiv"
+
+// RUN: %clang -### -target arm %s -Wa,-mhwdiv=thumb -o %t.o 2>&1 \
+// RUN: | FileCheck --check-prefix=CHECK-THUMB %s
+// CHECK-THUMB: "-target-feature" "-hwdiv-arm"
+// CHECK-THUMB: "-target-feature" "+hwdiv"
+
+// RUN: %clang -### -target arm %s -Wa,-mhwdiv=bogus -o %t.o 2>&1 \
+// RUN: | FileCheck --check-prefix=CHECK-BOGUS-HDIV %s
+// CHECK-BOGUS-HDIV: error: {{.*}} does not support '-Wa,-mhwdiv=bogus'
+
Index: lib/Driver/Tools.cpp
===================================================================
--- lib/Driver/Tools.cpp
+++ lib/Driver/Tools.cpp
@@ -520,14 +520,27 @@
// Get Arch/CPU from args.
static void getARMArchCPUFromArgs(const ArgList &Args,
llvm::StringRef &Arch,
- llvm::StringRef &CPU) {
+ llvm::StringRef &CPU,
+ bool FromAs=false) {
if (const Arg *A = Args.getLastArg(options::OPT_mcpu_EQ))
CPU = A->getValue();
if (const Arg *A = Args.getLastArg(options::OPT_march_EQ))
Arch = A->getValue();
+ if (!FromAs)
+ return;
+
+ for (const Arg *A : Args.filtered(options::OPT_Wa_COMMA,
+ options::OPT_Xassembler)) {
+ StringRef Value = A->getValue();
+ if (Value.startswith("-mcpu="))
+ CPU = Value.substr(6);
+ if (Value.startswith("-march="))
+ Arch = Value.substr(7);
+ }
}
// Handle -mhwdiv=.
+// FIXME: Use ARMTargetParser.
static void getARMHWDivFeatures(const Driver &D, const Arg *A,
const ArgList &Args,
StringRef HWDiv,
@@ -558,7 +571,9 @@
D.Diag(diag::err_drv_clang_unsupported) << A->getAsString(Args);
}
-// Check -march=.
+// Check if -march is valid by checking if it can be canonicalised and parsed.
+// getARMArch is used here instead of just checking the -march value in order
+// to handle -march=native correctly.
static void checkARMArchName(const Driver &D, const Arg *A,
const ArgList &Args,
llvm::StringRef ArchName,
@@ -568,7 +583,7 @@
D.Diag(diag::err_drv_clang_unsupported) << A->getAsString(Args);
}
-// Check -mcpu=.
+// Check -mcpu=. Needs ArchName to handle -mcpu=generic.
static void checkARMCPUName(const Driver &D, const Arg *A,
const ArgList &Args,
llvm::StringRef CPUName,
@@ -677,6 +692,9 @@
bool KernelOrKext =
Args.hasArg(options::OPT_mkernel, options::OPT_fapple_kext);
StringRef FloatABI = tools::arm::getARMFloatABI(D, Args, Triple);
+ const Arg *WaCPU = nullptr, *WaFPU = nullptr;
+ const Arg *WaHdiv = nullptr, *WaArch = nullptr;
+
if (!ForAS) {
// FIXME: Note, this is a hack, the LLVM backend doesn't actually use these
// yet (it uses the -mfloat-abi and -msoft-float options), and it is
@@ -697,29 +715,53 @@
// Use software floating point argument passing?
if (FloatABI != "hard")
Features.push_back("+soft-float-abi");
+ } else {
+ // Here, we make sure that -Wa,-mfpu/cpu/arch/hwdiv will be passed down
+ // to the assembler correctly.
+ for (const Arg *A : Args.filtered(options::OPT_Wa_COMMA,
+ options::OPT_Xassembler)) {
+ StringRef Value = A->getValue();
+ if (Value.startswith("-mfpu=")) {
+ WaFPU = A;
+ } else if (Value.startswith("-mcpu=")) {
+ WaCPU = A;
+ } else if (Value.startswith("-mhwdiv=")) {
+ WaHdiv = A;
+ } else if (Value.startswith("-march=")) {
+ WaArch = A;
+ }
+ }
}
- // Honor -mfpu=.
- if (const Arg *A = Args.getLastArg(options::OPT_mfpu_EQ))
+ // Honor -mfpu=. ClangAs gives preference to -Wa,-mfpu=.
+ if (WaFPU)
+ getARMFPUFeatures(D, WaFPU, Args, StringRef(WaFPU->getValue()).substr(6), Features);
+ else if (const Arg *A = Args.getLastArg(options::OPT_mfpu_EQ))
getARMFPUFeatures(D, A, Args, A->getValue(), Features);
- // Honor -mhwdiv=
- if (const Arg *A = Args.getLastArg(options::OPT_mhwdiv_EQ))
+ // Honor -mhwdiv=. ClangAs gives preference to -Wa,-mhwdiv=.
+ if (WaHdiv)
+ getARMHWDivFeatures(D, WaHdiv, Args, StringRef(WaHdiv->getValue()).substr(8), Features);
+ else if (const Arg *A = Args.getLastArg(options::OPT_mhwdiv_EQ))
getARMHWDivFeatures(D, A, Args, A->getValue(), Features);
- // Check if -march is valid by checking if it can be canonicalised and parsed.
- // getARMArch is used here instead of just checking the -march value in order
- // to handle -march=native correctly.
+ // Check -march. ClangAs gives preference to -Wa,-march=.
StringRef ArchName;
- if (const Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
+ if (WaArch) {
+ ArchName = StringRef(WaArch->getValue()).substr(7);
+ checkARMArchName(D, WaArch, Args, ArchName, Triple);
+ // FIXME: Set Arch.
+ } else if (const Arg *A = Args.getLastArg(options::OPT_march_EQ)) {
ArchName = A->getValue();
checkARMArchName(D, A, Args, ArchName, Triple);
}
- // We do a similar thing with -mcpu, but here things are complicated because
- // the only function we have to check if a cpu is valid is
- // getLLVMArchSuffixForARM which also needs an architecture.
+ // Check -mcpu. ClangAs gives preference to -Wa,-mcpu=.
StringRef CPUName;
- if (const Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
+ if (WaCPU) {
+ CPUName = StringRef(WaCPU->getValue()).substr(6);
+ checkARMCPUName(D, WaCPU, Args, CPUName, ArchName, Triple);
+ // FIXME: Set CPU.
+ } else if (const Arg *A = Args.getLastArg(options::OPT_mcpu_EQ)) {
CPUName = A->getValue();
checkARMCPUName(D, A, Args, CPUName, ArchName, Triple);
}
@@ -1500,7 +1542,9 @@
}
}
-static std::string getCPUName(const ArgList &Args, const llvm::Triple &T) {
+static std::string getCPUName(const ArgList &Args,
+ const llvm::Triple &T,
+ bool FromAs=false) {
switch (T.getArch()) {
default:
return "";
@@ -1514,7 +1558,7 @@
case llvm::Triple::thumb:
case llvm::Triple::thumbeb: {
StringRef MArch, MCPU;
- getARMArchCPUFromArgs(Args, MArch, MCPU);
+ getARMArchCPUFromArgs(Args, MArch, MCPU, FromAs);
return arm::getARMTargetCPU(MCPU, MArch, T);
}
case llvm::Triple::mips:
@@ -2260,6 +2304,11 @@
TakeNextArg = true;
} else if (Value.startswith("-gdwarf-")) {
CmdArgs.push_back(Value.data());
+ } else if (Value.startswith("-mcpu") ||
+ Value.startswith("-mfpu") ||
+ Value.startswith("-mhwdiv") ||
+ Value.startswith("-march")) {
+ // Do nothing, we'll validate it later.
} else {
D.Diag(diag::err_drv_unsupported_option_argument)
<< A->getOption().getName() << Value;
@@ -3461,7 +3510,7 @@
}
// Add the target cpu
- std::string CPU = getCPUName(Args, Triple);
+ std::string CPU = getCPUName(Args, Triple, /*FromAs*/ false);
if (!CPU.empty()) {
CmdArgs.push_back("-target-cpu");
CmdArgs.push_back(Args.MakeArgString(CPU));
@@ -5283,7 +5332,7 @@
// Add the target cpu
const llvm::Triple Triple(TripleStr);
- std::string CPU = getCPUName(Args, Triple);
+ std::string CPU = getCPUName(Args, Triple, /*FromAs*/ true);
if (!CPU.empty()) {
CmdArgs.push_back("-target-cpu");
CmdArgs.push_back(Args.MakeArgString(CPU));
@@ -7347,7 +7396,7 @@
case llvm::Triple::thumb:
case llvm::Triple::thumbeb: {
StringRef MArch, MCPU;
- getARMArchCPUFromArgs(Args, MArch, MCPU);
+ getARMArchCPUFromArgs(Args, MArch, MCPU, /*FromAs*/ true);
std::string Arch = arm::getARMTargetCPU(MCPU, MArch, getToolChain().getTriple());
CmdArgs.push_back(Args.MakeArgString("-mcpu=" + Arch));
break;
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