File: badloadsink.ll

package info (click to toggle)
llvm-toolchain-13 1%3A13.0.1-6~deb11u1
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 1,418,812 kB
  • sloc: cpp: 5,290,827; ansic: 996,570; asm: 544,593; python: 188,212; objc: 72,027; lisp: 30,291; f90: 25,395; sh: 24,900; javascript: 9,780; pascal: 9,398; perl: 7,484; ml: 5,432; awk: 3,523; makefile: 2,892; xml: 953; cs: 573; fortran: 539
file content (26 lines) | stat: -rw-r--r-- 809 bytes parent folder | download | duplicates (9) 
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
 
; RUN: opt < %s -basic-aa -sink -S | FileCheck %s
declare void @foo(i64 *)
declare i8* @llvm.load.relative.i32(i8* %ptr, i32 %offset) argmemonly nounwind readonly
define i64 @sinkload(i1 %cmp, i8* %ptr, i32 %off) {
; CHECK-LABEL: @sinkload
top:
    %a = alloca i64
; CHECK: call void @foo(i64* %a)
; CHECK-NEXT: %x = load i64, i64* %a
; CHECK-NEXT: %y = call i8* @llvm.load.relative.i32(i8* %ptr, i32 %off)
    call void @foo(i64* %a)
    %x = load i64, i64* %a
    %y = call i8* @llvm.load.relative.i32(i8* %ptr, i32 %off)
    br i1 %cmp, label %A, label %B
A:
    store i64 0, i64 *%a
    store i8 0, i8 *%ptr
    br label %B
B:
; CHECK-NOT: load i64, i64 *%a
; CHECK-NOT: call i8* @llvm.load.relative(i8* %ptr, i32 off)
    %y2 = ptrtoint i8* %y to i64
    %retval = add i64 %y2, %x
    ret i64 %retval
}