File: load-no-aliasing.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 (24 lines) | stat: -rw-r--r-- 910 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
 
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -passes=instcombine -S < %s | FileCheck %s

; Check that load to load forwarding works with non aliasing store inbetween.
define i32 @test_load_store_load_combine(ptr, ptr) {
; CHECK-LABEL: @test_load_store_load_combine(
; CHECK-NEXT:    [[A:%.*]] = load i32, ptr [[TMP0:%.*]], align 4, !tbaa [[TBAA0:![0-9]+]]
; CHECK-NEXT:    [[F:%.*]] = sitofp i32 [[A]] to float
; CHECK-NEXT:    store float [[F]], ptr [[TMP1:%.*]], align 4, !tbaa [[TBAA4:![0-9]+]]
; CHECK-NEXT:    ret i32 [[A]]
;
  %a = load i32, ptr %0, align 4, !tbaa !0
  %f = sitofp i32 %a to float
  store float %f, ptr %1, align 4, !tbaa !4
  %b = load i32, ptr %0, align 4, !tbaa !0
  ret i32 %b
}

!0 = !{!1, !1, i64 0}
!1 = !{!"int", !2, i64 0}
!2 = !{!"omnipotent char", !3, i64 0}
!3 = !{!"Simple C++ TBAA"}
!4 = !{!5, !5, i64 0}
!5 = !{!"float", !2, i64 0}