File: int_sideeffect.ll

package info (click to toggle)
llvm-toolchain-19 1%3A19.1.7-3
  • links: PTS, VCS
  • area: main
  • in suites: forky, sid, trixie
  • size: 1,998,520 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 (27 lines) | stat: -rw-r--r-- 607 bytes parent folder | download | duplicates (12) 
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
 
; RUN: opt -S < %s -passes=early-cse -earlycse-debug-hash | FileCheck %s

declare void @llvm.sideeffect()

; Store-to-load forwarding across a @llvm.sideeffect.

; CHECK-LABEL: s2l
; CHECK-NOT: load
define float @s2l(ptr %p) {
    store float 0.0, ptr %p
    call void @llvm.sideeffect()
    %t = load float, ptr %p
    ret float %t
}

; Redundant load elimination across a @llvm.sideeffect.

; CHECK-LABEL: rle
; CHECK: load
; CHECK-NOT: load
define float @rle(ptr %p) {
    %r = load float, ptr %p
    call void @llvm.sideeffect()
    %s = load float, ptr %p
    %t = fadd float %r, %s
    ret float %t
}