File: cortex-a57-misched-stm.ll

package info (click to toggle)
llvm-toolchain-14 1%3A14.0.6-12
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,496,180 kB
  • sloc: cpp: 5,593,972; ansic: 986,872; asm: 585,869; python: 184,223; objc: 72,530; lisp: 31,119; f90: 27,793; javascript: 9,780; pascal: 9,762; sh: 9,482; perl: 7,468; ml: 5,432; awk: 3,523; makefile: 2,538; xml: 953; cs: 573; fortran: 567
file content (29 lines) | stat: -rw-r--r-- 898 bytes parent folder | download | duplicates (9) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
 
; REQUIRES: asserts
; RUN: llc < %s -mtriple=armv8r-eabi -mcpu=cortex-a57 -mattr=use-misched -verify-misched -debug-only=machine-scheduler -o - 2>&1 > /dev/null | FileCheck %s
; N=3 STMIB should have latency 2cyc

; CHECK:       ********** MI Scheduling **********
; We need second, post-ra scheduling to have STM instruction combined from single-stores
; CHECK:       ********** MI Scheduling **********
; CHECK:       schedule starting
; CHECK:       STMIB
; CHECK:       rdefs left
; CHECK-NEXT:  Latency            : 2

define i32 @test_stm(i32 %v0, i32 %v1, i32* %addr) {

  %addr.1 = getelementptr i32, i32* %addr, i32 1
  store i32 %v0, i32* %addr.1

  %addr.2 = getelementptr i32, i32* %addr, i32 2
  store i32 %v1, i32* %addr.2

  %addr.3 = getelementptr i32, i32* %addr, i32 3
  %val = ptrtoint i32* %addr to i32
  store i32 %val, i32* %addr.3

  %rv = add i32 %v0, %v1

  ret i32 %rv
}