scripts: llvm: Add RV32E multi-lib alternate mappings

This commit adds the alternate RV32E multi-lib mappings, based on the
list of the GCC RV32E multi-lib mappings (gcc/config/riscv/t-zephyr).

Signed-off-by: Stephanos Ioannidis <root@stephanos.io>

Author: stephanosio

scripts/llvm/cmake/multilib.yaml.in

@@ -219,3 +219,29 @@ Mappings:
 - Match: -march=rv32i([0-9]+p[0-9]+)_a([0-9]+p[0-9]+)_f([0-9]+p[0-9]+)_c([0-9]+p[0-9]+)_zicsr([0-9]+p[0-9]+)_zifencei([0-9]+p[0-9]+)
   Flags:
   - -march=rv32i2p1_f2p2_zicsr2p0_zifencei2p0
+
+# RV32E alternate mappings
+## march.rv32e_zicsr_zifencei/mabi.ilp32e=march.rv32ea_zicsr_zifencei/mabi.ilp32e
+- Match: -march=rv32e([0-9]+p[0-9]+)_a([0-9]+p[0-9]+)_zicsr([0-9]+p[0-9]+)_zifencei([0-9]+p[0-9]+)
+  Flags:
+  - -march=rv32e2p0_zicsr2p0_zifencei2p0
+## march.rv32e_zicsr_zifencei/mabi.ilp32e=march.rv32eac_zicsr_zifencei/mabi.ilp32e
+- Match: -march=rv32e([0-9]+p[0-9]+)_a([0-9]+p[0-9]+)_c([0-9]+p[0-9]+)_zicsr([0-9]+p[0-9]+)_zifencei([0-9]+p[0-9]+)
+  Flags:
+  - -march=rv32e2p0_zicsr2p0_zifencei2p0
+## march.rv32e_zicsr_zifencei/mabi.ilp32e=march.rv32ec_zicsr_zifencei/mabi.ilp32e
+- Match: -march=rv32e([0-9]+p[0-9]+)_c([0-9]+p[0-9]+)_zicsr([0-9]+p[0-9]+)_zifencei([0-9]+p[0-9]+)
+  Flags:
+  - -march=rv32e2p0_zicsr2p0_zifencei2p0
+## march.rv32em_zicsr_zifencei/mabi.ilp32e=march.rv32ema_zicsr_zifencei/mabi.ilp32e
+- Match: -march=rv32e([0-9]+p[0-9]+)_m([0-9]+p[0-9]+)_a([0-9]+p[0-9]+)_zicsr([0-9]+p[0-9]+)_zifencei([0-9]+p[0-9]+)_zmmul([0-9]+p[0-9]+)
+  Flags:
+  - -march=rv32e2p0_m2p0_zicsr2p0_zifencei2p0_zmmul1p0
+## march.rv32emc_zicsr_zifencei/mabi.ilp32e=march.rv32emac_zicsr_zifencei/mabi.ilp32e
+- Match: -march=rv32e([0-9]+p[0-9]+)_m([0-9]+p[0-9]+)_a([0-9]+p[0-9]+)_c([0-9]+p[0-9]+)_zicsr([0-9]+p[0-9]+)_zifencei([0-9]+p[0-9]+)_zmmul([0-9]+p[0-9]+)
+  Flags:
+  - -march=rv32e2p0_m2p0_c2p0_zicsr2p0_zifencei2p0_zmmul1p0
+## march.rv32emc_zicsr_zifencei_zba_zbb_zbc_zbs/mabi.ilp32e=march.rv32emac_zicsr_zifencei_zba_zbb_zbc_zbs/mabi.ilp32e
+- Match: -march=rv32e([0-9]+p[0-9]+)_m([0-9]+p[0-9]+)_a([0-9]+p[0-9]+)_c([0-9]+p[0-9]+)_zicsr([0-9]+p[0-9]+)_zifencei([0-9]+p[0-9]+)_zmmul([0-9]+p[0-9]+)_zba([0-9]+p[0-9]+)_zbb([0-9]+p[0-9]+)_zbc([0-9]+p[0-9]+)_zbs([0-9]+p[0-9]+)
+  Flags:
+  - -march=rv32e2p0_m2p0_c2p0_zicsr2p0_zifencei2p0_zmmul1p0_zba1p0_zbb1p0_zbc1p0_zbs1p0

scripts/llvm/test/multilib/rv32e.test

@@ -1,16 +1,22 @@
 # RUN: %clang -print-multi-directory --target=riscv32-none-elf -march=rv32e_zicsr_zifencei -mabi=ilp32e | FileCheck %s --check-prefix=RV32E_ZICSR_ZIFENCEI_ILP32E
+# RUN: %clang -print-multi-directory --target=riscv32-none-elf -march=rv32ea_zicsr_zifencei -mabi=ilp32e | FileCheck %s --check-prefix=RV32E_ZICSR_ZIFENCEI_ILP32E
+# RUN: %clang -print-multi-directory --target=riscv32-none-elf -march=rv32eac_zicsr_zifencei -mabi=ilp32e | FileCheck %s --check-prefix=RV32E_ZICSR_ZIFENCEI_ILP32E
+# RUN: %clang -print-multi-directory --target=riscv32-none-elf -march=rv32ec_zicsr_zifencei -mabi=ilp32e | FileCheck %s --check-prefix=RV32E_ZICSR_ZIFENCEI_ILP32E
 # RV32E_ZICSR_ZIFENCEI_ILP32E: riscv32-none-elf/rv32e_zicsr_zifencei_ilp32e_exn_rtti{{$}}
 # RV32E_ZICSR_ZIFENCEI_ILP32E-EMPTY:
 
 # RUN: %clang -print-multi-directory --target=riscv32-none-elf -march=rv32em_zicsr_zifencei -mabi=ilp32e | FileCheck %s --check-prefix=RV32EM_ZICSR_ZIFENCEI_ILP32E
+# RUN: %clang -print-multi-directory --target=riscv32-none-elf -march=rv32ema_zicsr_zifencei -mabi=ilp32e | FileCheck %s --check-prefix=RV32EM_ZICSR_ZIFENCEI_ILP32E
 # RV32EM_ZICSR_ZIFENCEI_ILP32E: riscv32-none-elf/rv32em_zicsr_zifencei_ilp32e_exn_rtti{{$}}
 # RV32EM_ZICSR_ZIFENCEI_ILP32E-EMPTY:
 
 # RUN: %clang -print-multi-directory --target=riscv32-none-elf -march=rv32emc_zicsr_zifencei -mabi=ilp32e | FileCheck %s --check-prefix=RV32EMC_ZICSR_ZIFENCEI_ILP32E
+# RUN: %clang -print-multi-directory --target=riscv32-none-elf -march=rv32emac_zicsr_zifencei -mabi=ilp32e | FileCheck %s --check-prefix=RV32EMC_ZICSR_ZIFENCEI_ILP32E
 # RV32EMC_ZICSR_ZIFENCEI_ILP32E: riscv32-none-elf/rv32emc_zicsr_zifencei_ilp32e_exn_rtti{{$}}
 # RV32EMC_ZICSR_ZIFENCEI_ILP32E-EMPTY:
 
 # RUN: %clang -print-multi-directory --target=riscv32-none-elf -march=rv32emc_zicsr_zifencei_zba_zbb_zbc_zbs -mabi=ilp32e | FileCheck %s --check-prefix=RV32EMC_ZICSR_ZIFENCEI_ZBA_ZBB_ZBC_ZBS_ILP32E
+# RUN: %clang -print-multi-directory --target=riscv32-none-elf -march=rv32emac_zicsr_zifencei_zba_zbb_zbc_zbs -mabi=ilp32e | FileCheck %s --check-prefix=RV32EMC_ZICSR_ZIFENCEI_ZBA_ZBB_ZBC_ZBS_ILP32E
 # RV32EMC_ZICSR_ZIFENCEI_ZBA_ZBB_ZBC_ZBS_ILP32E: riscv32-none-elf/rv32emc_zicsr_zifencei_zba_zbb_zbc_zbs_ilp32e_exn_rtti{{$}}
 # RV32EMC_ZICSR_ZIFENCEI_ZBA_ZBB_ZBC_ZBS_ILP32E-EMPTY: