69cd746bd2
This patch adds a Clang-compatible -mtune option to llc, to enable decoupled ISA and microarchitecture targeting, which is especially important for backend development. For example, it can enable to easily test a subtarget feature or scheduling model effects on codegen across a variaty of workloads on the IR corpus benchmark: https://github.com/dtcxzyw/llvm-codegen-benchmark. The implementation adds an isolated generic codegen flag, to establish a base for wider usage - the plan is to add it to `opt` as well in a followup patch. Then `llc` consumes it, and sets `tune-cpu` attributes for functions, which are further consumed by the backend.
70 lines
3.2 KiB
LLVM
70 lines
3.2 KiB
LLVM
; REQUIRES: aarch64-registered-target
|
|
|
|
;; There shouldn't be a default -mtune.
|
|
; RUN: llc < %s -mtriple=aarch64 | FileCheck %s --check-prefixes=CHECK-NOTUNE
|
|
|
|
; RUN: llc < %s -mtriple=aarch64 -mtune=generic | FileCheck %s --check-prefixes=CHECK-TUNE-GENERIC
|
|
; RUN: llc < %s -mtriple=aarch64 -mtune=apple-m5 | FileCheck %s --check-prefixes=CHECK-TUNE-APPLE-M5
|
|
|
|
;; Check interaction between mcpu and mtune.
|
|
; RUN: llc < %s -mtriple=aarch64 -mcpu=apple-m5 | FileCheck %s --check-prefixes=CHECK-TUNE-APPLE-M5
|
|
; RUN: llc < %s -mtriple=aarch64 -mcpu=apple-m5 -mtune=generic | FileCheck %s --check-prefixes=CHECK-TUNE-GENERIC
|
|
|
|
;; Test -mtune=help
|
|
; RUN: llc -mtriple=aarch64 -mtune=help 2>&1 | FileCheck %s --check-prefixes=CHECK-TUNE-HELP,CHECK-TUNE-HELP-NO-COMPILE
|
|
; RUN: llc -mtriple=aarch64 -mtune=help -o %t.s 2>&1 | FileCheck %s --check-prefixes=CHECK-TUNE-HELP,CHECK-TUNE-HELP-NO-COMPILE
|
|
; RUN: llc < %s -mtriple=aarch64 -mtune=help 2>&1 | FileCheck %s --check-prefixes=CHECK-TUNE-HELP,CHECK-TUNE-HELP-NO-COMPILE
|
|
; RUN: llc < %s -mtriple=aarch64 -mtune=help -o %t.s 2>&1 | FileCheck %s --check-prefixes=CHECK-TUNE-HELP,CHECK-TUNE-HELP-NO-COMPILE
|
|
|
|
;; Missing target triple for -mtune=help
|
|
; RUN: not llc -mtune=help 2>&1 | FileCheck %s --check-prefixes=CHECK-TUNE-HELP-MISSING-TRIPLE
|
|
; RUN: not llc < %s -mtune=help 2>&1 | FileCheck %s --check-prefixes=CHECK-TUNE-HELP-MISSING-TRIPLE
|
|
|
|
; CHECK-TUNE-HELP: Available CPUs for this target:
|
|
; CHECK-TUNE-HELP: Available features for this target:
|
|
|
|
;; To check we dont compile the file
|
|
; CHECK-TUNE-HELP-NO-COMPILE-NOT: zero_cycle_regmove_FPR32:
|
|
|
|
; CHECK-TUNE-HELP-MISSING-TRIPLE: error: unable to get target for 'unknown', see --version and --triple.
|
|
|
|
;; A test case that depends on `FeatureZCRegMoveFPR128` tuning feature, to enable -mtune verification
|
|
;; through codegen effects. Taken from: llvm/test/CodeGen/AArch64/arm64-zero-cycle-regmove-fpr.ll
|
|
define void @zero_cycle_regmove_FPR32(float %a, float %b, float %c, float %d) {
|
|
; CHECK-NOTUNE-LABEL: zero_cycle_regmove_FPR32:
|
|
; CHECK-NOTUNE: fmov s0, s2
|
|
; CHECK-NOTUNE-NEXT: fmov s1, s3
|
|
; CHECK-NOTUNE-NEXT: fmov s8, s3
|
|
; CHECK-NOTUNE-NEXT: fmov s9, s2
|
|
; CHECK-NOTUNE-NEXT: bl foo_float
|
|
; CHECK-NOTUNE-NEXT: fmov s0, s9
|
|
; CHECK-NOTUNE-NEXT: fmov s1, s8
|
|
; CHECK-NOTUNE-NEXT: bl foo_float
|
|
;
|
|
; CHECK-TUNE-GENERIC-LABEL: zero_cycle_regmove_FPR32:
|
|
; CHECK-TUNE-GENERIC: fmov s0, s2
|
|
; CHECK-TUNE-GENERIC-NEXT: fmov s1, s3
|
|
; CHECK-TUNE-GENERIC-NEXT: fmov s8, s3
|
|
; CHECK-TUNE-GENERIC-NEXT: fmov s9, s2
|
|
; CHECK-TUNE-GENERIC-NEXT: bl foo_float
|
|
; CHECK-TUNE-GENERIC-NEXT: fmov s0, s9
|
|
; CHECK-TUNE-GENERIC-NEXT: fmov s1, s8
|
|
; CHECK-TUNE-GENERIC-NEXT: bl foo_float
|
|
;
|
|
; CHECK-TUNE-APPLE-M5-LABEL: zero_cycle_regmove_FPR32:
|
|
; CHECK-TUNE-APPLE-M5: mov v8.16b, v3.16b
|
|
; CHECK-TUNE-APPLE-M5-NEXT: mov v9.16b, v2.16b
|
|
; CHECK-TUNE-APPLE-M5-NEXT: mov v0.16b, v2.16b
|
|
; CHECK-TUNE-APPLE-M5-NEXT: mov v1.16b, v3.16b
|
|
; CHECK-TUNE-APPLE-M5-NEXT: bl foo_float
|
|
; CHECK-TUNE-APPLE-M5-NEXT: mov v0.16b, v9.16b
|
|
; CHECK-TUNE-APPLE-M5-NEXT: mov v1.16b, v8.16b
|
|
; CHECK-TUNE-APPLE-M5-NEXT: bl foo_float
|
|
entry:
|
|
%call = call float @foo_float(float %c, float %d)
|
|
%call1 = call float @foo_float(float %c, float %d)
|
|
unreachable
|
|
}
|
|
|
|
declare float @foo_float(float, float)
|