File: no_idiv_reduction.ll

package info (click to toggle)
swiftlang 6.1.3-2
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid
  • size: 2,791,604 kB
  • sloc: cpp: 9,901,740; ansic: 2,201,431; asm: 1,091,827; python: 308,252; objc: 82,166; f90: 80,126; lisp: 38,358; pascal: 25,559; sh: 20,429; ml: 5,058; perl: 4,745; makefile: 4,484; awk: 3,535; javascript: 3,018; xml: 918; fortran: 664; cs: 573; ruby: 396
file content (24 lines) | stat: -rw-r--r-- 825 bytes parent folder | download | duplicates (16) 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
 
; RUN: opt -passes=loop-vectorize -force-vector-width=2 -force-vector-interleave=1 -S < %s | FileCheck %s
@a = common global [128 x i32] zeroinitializer, align 16

;; Must not vectorize division reduction. Division is lossy.
define i32 @g() {
entry:
  br label %for.body

for.body:
  ; CHECK-LABEL: @g(
  ; CHECK-NOT: sdiv <2 x i32>
  %indvars.iv = phi i64 [ 0, %entry ], [ %indvars.iv.next, %for.body ]
  %r.05 = phi i32 [ 80, %entry ], [ %div, %for.body ]
  %arrayidx = getelementptr inbounds [128 x i32], ptr @a, i64 0, i64 %indvars.iv
  %0 = load i32, ptr %arrayidx, align 4
  %div = sdiv i32 %r.05, %0
  %indvars.iv.next = add i64 %indvars.iv, 1
  %lftr.wideiv = trunc i64 %indvars.iv.next to i32
  %exitcond = icmp eq i32 %lftr.wideiv, 1024
  br i1 %exitcond, label %for.end, label %for.body

for.end:
  ret i32 %div
}