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[RISCV] Allow -mcmodel= to accept large for RV64 #107817

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Sep 12, 2024
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[RISCV] Allow -mcmodel= to accept large for RV64 #107817

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e394e7c
[RISCV] Allow -mcmodel= to accept large for RV64
tclin914 Sep 9, 2024
5361de7
Add checking that large code model is disallowed to be used with PIC …
tclin914 Sep 10, 2024
cb5e946
Add -mcmodel=large to ReleaseNotes.rst
tclin914 Sep 11, 2024
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2 changes: 2 additions & 0 deletions clang/docs/ReleaseNotes.rst
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Expand Up @@ -455,6 +455,8 @@ LoongArch Support
RISC-V Support
^^^^^^^^^^^^^^

- The option ``-mcmodel=large`` for the large code model is supported.

CUDA/HIP Language Changes
^^^^^^^^^^^^^^^^^^^^^^^^^

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7 changes: 6 additions & 1 deletion clang/lib/Driver/ToolChains/CommonArgs.cpp
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Expand Up @@ -2902,11 +2902,16 @@ void tools::addMCModel(const Driver &D, const llvm::opt::ArgList &Args,
} else if (Triple.isPPC64() || Triple.isOSAIX()) {
Ok = CM == "small" || CM == "medium" || CM == "large";
} else if (Triple.isRISCV()) {
// Large code model is disallowed to be used with PIC code model.
if (CM == "large" && RelocationModel != llvm::Reloc::Static)
D.Diag(diag::err_drv_argument_not_allowed_with)
<< A->getAsString(Args) << "-fpic";
if (CM == "medlow")
CM = "small";
else if (CM == "medany")
CM = "medium";
Ok = CM == "small" || CM == "medium";
Ok = CM == "small" || CM == "medium" ||
(CM == "large" && Triple.isRISCV64());
} else if (Triple.getArch() == llvm::Triple::x86_64) {
Ok = llvm::is_contained({"small", "kernel", "medium", "large", "tiny"},
CM);
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9 changes: 9 additions & 0 deletions clang/test/Driver/riscv-mcmodel.c
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Expand Up @@ -10,5 +10,14 @@
// RUN: %clang --target=riscv32 -### -c -mcmodel=medany %s 2>&1 | FileCheck --check-prefix=MEDIUM %s
// RUN: %clang --target=riscv64 -### -c -mcmodel=medany %s 2>&1 | FileCheck --check-prefix=MEDIUM %s

// RUN: not %clang --target=riscv32 -### -c -mcmodel=large %s 2>&1 | FileCheck --check-prefix=ERR-LARGE %s
// RUN: %clang --target=riscv64 -### -c -mcmodel=large %s 2>&1 | FileCheck --check-prefix=LARGE %s

// RUN: not %clang --target=riscv64 -### -c -mcmodel=large -fpic %s 2>&1 | FileCheck --check-prefix=LARGE %s

// SMALL: "-mcmodel=small"
// MEDIUM: "-mcmodel=medium"
// LARGE: "-mcmodel=large"

// ERR-LARGE: error: unsupported argument 'large' to option '-mcmodel=' for target 'riscv32'
// ERR-PIC-LARGE: error: invalid argument '-mcmodel=large' not allowed with '-fpic'
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