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llvm-project/clang/test/Driver/riscv-cpus.c

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[RISCV] Add support for -mcpu option. Summary: 1. gcc uses `-march` and `-mtune` flag to chose arch and pipeline model, but clang does not have `-mtune` flag, we uses `-mcpu` to chose both infos. 2. Add SiFive e31 and u54 cpu which have default march and pipeline model. 3. Specific `-mcpu` with rocket-rv[32|64] would select pipeline model only, and use the driver's arch choosing logic to get default arch. Reviewers: lenary, asb, evandro, HsiangKai Reviewed By: lenary, asb, evandro Tags: #llvm, #clang Differential Revision: https://reviews.llvm.org/D71124
2020-07-17 01:32:01 +08:00
// Check target CPUs are correctly passed.
// RUN: %clang -target riscv32 -### -c %s 2>&1 -mcpu=rocket-rv32 | FileCheck -check-prefix=MCPU-ROCKETCHIP32 %s
// MCPU-ROCKETCHIP32: "-nostdsysteminc" "-target-cpu" "rocket-rv32"
// RUN: %clang -target riscv64 -### -c %s 2>&1 -mcpu=rocket-rv64 | FileCheck -check-prefix=MCPU-ROCKETCHIP64 %s
// MCPU-ROCKETCHIP64: "-nostdsysteminc" "-target-cpu" "rocket-rv64"
// MCPU-ROCKETCHIP64: "-target-feature" "+64bit"
// mcpu with default march
// RUN: %clang -target riscv64 -### -c %s 2>&1 -mcpu=sifive-u54 | FileCheck -check-prefix=MCPU-SIFIVE-U54 %s
// MCPU-SIFIVE-U54: "-nostdsysteminc" "-target-cpu" "sifive-u54"
// MCPU-SIFIVE-U54: "-target-feature" "+m" "-target-feature" "+a" "-target-feature" "+f" "-target-feature" "+d"
// MCPU-SIFIVE-U54: "-target-feature" "+c" "-target-feature" "+64bit"
// MCPU-SIFIVE-U54: "-target-abi" "lp64d"
// mcpu with mabi option
// RUN: %clang -target riscv64 -### -c %s 2>&1 -mcpu=sifive-u54 -mabi=lp64 | FileCheck -check-prefix=MCPU-ABI-SIFIVE-U54 %s
// MCPU-ABI-SIFIVE-U54: "-nostdsysteminc" "-target-cpu" "sifive-u54"
// MCPU-ABI-SIFIVE-U54: "-target-feature" "+m" "-target-feature" "+a" "-target-feature" "+f" "-target-feature" "+d"
// MCPU-ABI-SIFIVE-U54: "-target-feature" "+c" "-target-feature" "+64bit"
// MCPU-ABI-SIFIVE-U54: "-target-abi" "lp64"
// march overwirte mcpu's default march
// RUN: %clang -target riscv32 -### -c %s 2>&1 -mcpu=sifive-e31 -march=rv32imc | FileCheck -check-prefix=MCPU-MARCH %s
// MCPU-MARCH: "-nostdsysteminc" "-target-cpu" "sifive-e31" "-target-feature" "+m" "-target-feature" "+c"
// MCPU-MARCH: "-target-abi" "ilp32"
// Check failed cases
// RUN: %clang -target riscv32 -### -c %s 2>&1 -mcpu=generic-rv321 | FileCheck -check-prefix=FAIL-MCPU-NAME %s
// FAIL-MCPU-NAME: error: the clang compiler does not support '-mcpu=generic-rv321'
// RUN: %clang -target riscv32 -### -c %s 2>&1 -mcpu=generic-rv32 -march=rv64i | FileCheck -check-prefix=MISMATCH-ARCH %s
// MISMATCH-ARCH: error: the clang compiler does not support '-mcpu=generic-rv32'
// RUN: %clang -target riscv32 -### -c %s 2>&1 -mcpu=generic-rv64 | FileCheck -check-prefix=MISMATCH-MCPU %s
// MISMATCH-MCPU: error: the clang compiler does not support '-mcpu=generic-rv64'