File: latency.ll

package info (click to toggle)
llvm-toolchain-21 1%3A21.1.6-2
  • links: PTS, VCS
  • area: main
  • in suites: forky
  • size: 2,245,044 kB
  • sloc: cpp: 7,619,726; ansic: 1,434,018; asm: 1,058,748; python: 252,740; f90: 94,671; objc: 70,685; lisp: 42,813; pascal: 18,401; sh: 8,601; ml: 5,111; perl: 4,720; makefile: 3,666; awk: 3,523; javascript: 2,409; xml: 892; fortran: 770
file content (16 lines) | stat: -rw-r--r-- 776 bytes parent folder | download | duplicates (5) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
 
; RUN: llc -mtriple=thumb-none-eabi %s -o - -mcpu=cortex-m0 -asm-print-latency=1 | FileCheck %s --match-full-lines --check-prefix=ON
; RUN: llc -mtriple=thumb-none-eabi %s -o - -mcpu=cortex-m0 -asm-print-latency=0 | FileCheck %s --match-full-lines --check-prefix=OFF
; RUN: llc -mtriple=thumb-none-eabi %s -o - -mcpu=cortex-m0                      | FileCheck %s --match-full-lines --check-prefix=OFF

define i64 @load_i64(ptr %ptr){
; ON:   ldr     r2, [r0]                        @  Latency: 4
; ON:   ldr     r1, [r0, #4]                    @  Latency: 4
; ON:   mov     r0, r2                          @  Latency: 2
; ON:   bx      lr
; OFF:  ldr     r2, [r0]
; OFF:  ldr     r1, [r0, #4]
; OFF:  mov     r0, r2
; OFf:  bx      lr
  %a = load i64, ptr %ptr
  ret i64 %a
}