File: icmp_sdiv_with_and_without_range.ll

package info (click to toggle)
llvm-toolchain-15 1%3A15.0.6-4
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,554,644 kB
  • sloc: cpp: 5,922,452; ansic: 1,012,136; asm: 674,362; python: 191,568; objc: 73,855; f90: 42,327; lisp: 31,913; pascal: 11,973; javascript: 10,144; sh: 9,421; perl: 7,447; ml: 5,527; awk: 3,523; makefile: 2,520; xml: 885; cs: 573; fortran: 567
file content (31 lines) | stat: -rw-r--r-- 935 bytes parent folder | download 
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
30
31
 
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=instcombine -S < %s | FileCheck %s

; Test that presence of range does not cause unprofitable transforms with bit
; arithmetics.

define i1 @without_range(i32* %A) {
; CHECK-LABEL: @without_range(
; CHECK-NEXT:    [[A_VAL:%.*]] = load i32, i32* [[A:%.*]], align 8
; CHECK-NEXT:    [[C:%.*]] = icmp slt i32 [[A_VAL]], 2
; CHECK-NEXT:    ret i1 [[C]]
;
  %A.val = load i32, i32* %A, align 8
  %B = sdiv i32 %A.val, 2
  %C = icmp sge i32 0, %B
  ret i1 %C
}

define i1 @with_range(i32* %A) {
; CHECK-LABEL: @with_range(
; CHECK-NEXT:    [[A_VAL:%.*]] = load i32, i32* [[A:%.*]], align 8, !range [[RNG0:![0-9]+]]
; CHECK-NEXT:    [[C:%.*]] = icmp ult i32 [[A_VAL]], 2
; CHECK-NEXT:    ret i1 [[C]]
;
  %A.val = load i32, i32* %A, align 8, !range !0
  %B = sdiv i32 %A.val, 2
  %C = icmp sge i32 0, %B
  ret i1 %C
}

!0 = !{i32 0, i32 2147483647}