File: multiple-div.ll

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm-proposed-updates
  • size: 1,998,492 kB
  • sloc: cpp: 6,951,680; ansic: 1,486,157; asm: 913,598; python: 232,024; f90: 80,126; objc: 75,281; lisp: 37,276; pascal: 16,990; sh: 10,009; ml: 5,058; perl: 4,724; awk: 3,523; makefile: 3,167; javascript: 2,504; xml: 892; fortran: 664; cs: 573
file content (21 lines) | stat: -rw-r--r-- 616 bytes parent folder | download | duplicates (29) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
 
; RUN: llc < %s -march=sparc | FileCheck %s
; RUN: llc -O0 < %s -march=sparc | FileCheck %s

;; llc -O0 used to try to spill Y to the stack, which isn't possible,
;; and then crashed. Additionally, in -O1, it would omit the second
;; apparently-redundant wr to %y, which is not actually redundant
;; because the spec says to treat %y as potentially-written by udiv.

; CHECK-LABEL: two_divides:
; CHECK: wr %g0, %g0, %y
; CHECK: udiv
; CHECK: wr %g0, %g0, %y
; CHECK: udiv
; CHECK: add

define i32 @two_divides(i32 %a, i32 %b) {
  %r = udiv i32 %a, %b
  %r2 = udiv i32 %b, %a
  %r3 = add i32 %r, %r2
  ret i32 %r3
}