3ac9fe69f7
This commit includes the necessary changes to clang and LLVM to support codegen of `RVE` and the `ilp32e`/`lp64e` ABIs. The differences between `RVE` and `RVI` are: * `RVE` reduces the integer register count to 16(x0-x16). * The ABI should be `ilp32e` for 32 bits and `lp64e` for 64 bits. `RVE` can be combined with all current standard extensions. The central changes in ilp32e/lp64e ABI, compared to ilp32/lp64 are: * Only 6 integer argument registers (rather than 8). * Only 2 callee-saved registers (rather than 12). * A Stack Alignment of 32bits (rather than 128bits). * ilp32e isn't compatible with D ISA extension. If `ilp32e` or `lp64` is used with an ISA that has any of the registers x16-x31 and f0-f31, then these registers are considered temporaries. To be compatible with the implementation of ilp32e in GCC, we don't use aligned registers to pass variadic arguments and set stack alignment\ to 4-bytes for types with length of 2*XLEN. FastCC is also supported on RVE, while GHC isn't since there is only one avaiable register. Differential Revision: https://reviews.llvm.org/D70401
40 lines
1.8 KiB
LLVM
40 lines
1.8 KiB
LLVM
; RUN: llc -mtriple=riscv32 < %s \
|
|
; RUN: | FileCheck -check-prefix=CHECK-IMP %s
|
|
; RUN: llc -mtriple=riscv32 -target-abi ilp32 < %s \
|
|
; RUN: | FileCheck -check-prefix=CHECK-IMP %s
|
|
; RUN: llc -mtriple=riscv32 -target-abi ilp32e < %s 2>&1 \
|
|
; RUN: | FileCheck -check-prefix=CHECK-IMP %s
|
|
; RUN: llc -mtriple=riscv32 -mattr=+f -target-abi ilp32 < %s \
|
|
; RUN: | FileCheck -check-prefix=CHECK-IMP %s
|
|
; RUN: llc -mtriple=riscv32 -mattr=+d -target-abi ilp32 < %s \
|
|
; RUN: | FileCheck -check-prefix=CHECK-IMP %s
|
|
; RUN: llc -mtriple=riscv64 < %s \
|
|
; RUN: | FileCheck -check-prefix=CHECK-IMP %s
|
|
; RUN: llc -mtriple=riscv64 -target-abi lp64 < %s \
|
|
; RUN: | FileCheck -check-prefix=CHECK-IMP %s
|
|
; RUN: llc -mtriple=riscv64 -target-abi lp64e < %s \
|
|
; RUN: | FileCheck -check-prefix=CHECK-IMP %s
|
|
; RUN: llc -mtriple=riscv64 -mattr=+f -target-abi lp64 < %s \
|
|
; RUN: | FileCheck -check-prefix=CHECK-IMP %s
|
|
; RUN: llc -mtriple=riscv64 -mattr=+d -target-abi lp64 < %s \
|
|
; RUN: | FileCheck -check-prefix=CHECK-IMP %s
|
|
; RUN: llc -mtriple=riscv32 -mattr=+f -target-abi ilp32f < %s 2>&1 \
|
|
; RUN: | FileCheck -check-prefix=CHECK-IMP %s
|
|
; RUN: llc -mtriple=riscv32 -mattr=+d -target-abi ilp32f < %s 2>&1 \
|
|
; RUN: | FileCheck -check-prefix=CHECK-IMP %s
|
|
; RUN: llc -mtriple=riscv32 -mattr=+d -target-abi ilp32d < %s 2>&1 \
|
|
; RUN: | FileCheck -check-prefix=CHECK-IMP %s
|
|
; RUN: llc -mtriple=riscv64 -mattr=+f -target-abi lp64f < %s 2>&1 \
|
|
; RUN: | FileCheck -check-prefix=CHECK-IMP %s
|
|
; RUN: llc -mtriple=riscv64 -mattr=+d -target-abi lp64f < %s 2>&1 \
|
|
; RUN: | FileCheck -check-prefix=CHECK-IMP %s
|
|
; RUN: llc -mtriple=riscv64 -mattr=+d -target-abi lp64d < %s 2>&1 \
|
|
; RUN: | FileCheck -check-prefix=CHECK-IMP %s
|
|
|
|
define void @nothing() nounwind {
|
|
; CHECK-IMP-LABEL: nothing:
|
|
; CHECK-IMP: # %bb.0:
|
|
; CHECK-IMP-NEXT: ret
|
|
ret void
|
|
}
|