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

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[RISCV] Add the RISCV target and compiler driver As RV64 codegen has not yet been upstreamed into LLVM, we focus on RV32 driver support (RV64 to follow). Differential Revision: https://reviews.llvm.org/D39963 llvm-svn: 322276
2018-01-11 21:36:56 +08:00
// RUN: %clang -target riscv32-unknown-elf -### %s -fsyntax-only 2>&1 | FileCheck %s
// RUN: %clang -target riscv64-unknown-elf -### %s -fsyntax-only 2>&1 | FileCheck %s
// CHECK: fno-signed-char
[RISCV] Add -mrelax/-mno-relax flags to enable/disable RISCV linker relaxation Differential Revision: https://reviews.llvm.org/D44888 llvm-svn: 333385
2018-05-29 08:44:15 +08:00
[RISC-V] Add -msave-restore and -mno-save-restore to clang driver Summary: The GCC RISC-V toolchain accepts `-msave-restore` and `-mno-save-restore` to control whether libcalls are used for saving and restoring the stack within prologues and epilogues. Clang currently errors if someone passes -msave-restore or -mno-save-restore. This means that people need to change build configurations to use clang. This patch adds these flags, so that clang invocations can now match gcc. As the RISC-V backend does not currently have a `save-restore` target feature, we emit a warning if someone requests `-msave-restore`. LLVM does not error if we pass the (unimplemented) target features `+save-restore` or `-save-restore`. Reviewers: asb, luismarques Reviewed By: asb Subscribers: rbar, johnrusso, simoncook, apazos, sabuasal, niosHD, kito-cheng, shiva0217, jrtc27, zzheng, edward-jones, rogfer01, MartinMosbeck, brucehoult, the_o, rkruppe, PkmX, jocewei, cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D63498 llvm-svn: 364018
2019-06-21 18:03:31 +08:00
// RUN: %clang -target riscv32-unknown-elf -### %s 2>&1 | FileCheck %s -check-prefix=DEFAULT
[RISCV] Add -mrelax/-mno-relax flags to enable/disable RISCV linker relaxation Differential Revision: https://reviews.llvm.org/D44888 llvm-svn: 333385
2018-05-29 08:44:15 +08:00
// RUN: %clang -target riscv32-unknown-elf -### %s -mrelax 2>&1 | FileCheck %s -check-prefix=RELAX
// RUN: %clang -target riscv32-unknown-elf -### %s -mno-relax 2>&1 | FileCheck %s -check-prefix=NO-RELAX
// RELAX: "-target-feature" "+relax"
// NO-RELAX: "-target-feature" "-relax"
[RISCV] Default enable RISCV linker relaxation Differential Revision: https://reviews.llvm.org/D47127 llvm-svn: 354222
2019-02-18 00:05:51 +08:00
// DEFAULT: "-target-feature" "+relax"
[RISCV] Add -mrelax/-mno-relax flags to enable/disable RISCV linker relaxation Differential Revision: https://reviews.llvm.org/D44888 llvm-svn: 333385
2018-05-29 08:44:15 +08:00
// DEFAULT-NOT: "-target-feature" "-relax"
[RISC-V] Add -msave-restore and -mno-save-restore to clang driver Summary: The GCC RISC-V toolchain accepts `-msave-restore` and `-mno-save-restore` to control whether libcalls are used for saving and restoring the stack within prologues and epilogues. Clang currently errors if someone passes -msave-restore or -mno-save-restore. This means that people need to change build configurations to use clang. This patch adds these flags, so that clang invocations can now match gcc. As the RISC-V backend does not currently have a `save-restore` target feature, we emit a warning if someone requests `-msave-restore`. LLVM does not error if we pass the (unimplemented) target features `+save-restore` or `-save-restore`. Reviewers: asb, luismarques Reviewed By: asb Subscribers: rbar, johnrusso, simoncook, apazos, sabuasal, niosHD, kito-cheng, shiva0217, jrtc27, zzheng, edward-jones, rogfer01, MartinMosbeck, brucehoult, the_o, rkruppe, PkmX, jocewei, cfe-commits Tags: #clang Differential Revision: https://reviews.llvm.org/D63498 llvm-svn: 364018
2019-06-21 18:03:31 +08:00
// RUN: %clang -target riscv32-unknown-elf -### %s -msave-restore 2>&1 | FileCheck %s -check-prefix=SAVE-RESTORE
// RUN: %clang -target riscv32-unknown-elf -### %s -mno-save-restore 2>&1 | FileCheck %s -check-prefix=NO-SAVE-RESTORE
// SAVE-RESTORE: warning: the clang compiler does not support '-msave-restore'
[RISCV] Avoid save-restore target feature warning Summary: LLVM issues a warning if passed unknown target features. Neither I nor @asb noticed this until after https://reviews.llvm.org/D63498 landed. This patch stops passing the (unknown) "save-restore" target feature to the LLVM backend, but continues to emit a warning if a driver asks for `-msave-restore`. The default of assuming `-mno-save-restore` (and emitting no warnings) remains. Reviewers: asb Reviewed By: asb Subscribers: rbar, johnrusso, simoncook, apazos, sabuasal, niosHD, kito-cheng, shiva0217, jrtc27, zzheng, edward-jones, rogfer01, MartinMosbeck, brucehoult, the_o, rkruppe, PkmX, jocewei, psnobl, benna, Jim, cfe-commits, asb Tags: #clang Differential Revision: https://reviews.llvm.org/D64008 llvm-svn: 364777
2019-07-01 22:53:56 +08:00
// NO-SAVE-RESTORE-NOT: warning: the clang compiler does not support
// DEFAULT-NOT: warning: the clang compiler does not support