File: pr33978.ll

package info (click to toggle)
llvm-toolchain-16 1%3A16.0.6-15~deb12u1
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,634,792 kB
  • sloc: cpp: 6,179,261; ansic: 1,216,205; asm: 741,319; python: 196,614; objc: 75,325; f90: 49,640; lisp: 32,396; pascal: 12,286; sh: 9,394; perl: 7,442; ml: 5,494; awk: 3,523; makefile: 2,723; javascript: 1,206; xml: 886; fortran: 581; cs: 573
file content (19 lines) | stat: -rw-r--r-- 714 bytes parent folder | download | duplicates (8)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
; RUN: llc -march=mips -mcpu=mips32r2 < %s -o /dev/null

; Test that SelectionDAG does not crash during DAGCombine when two pointers
; to the stack match with differing bases and offsets when expanding memcpy.
; This could result in one of the pointers being considered dereferenceable
; and other not.

define void @foo(ptr) {
start:
  %a = alloca [22 x i8]
  %b = alloca [22 x i8]
  %d = getelementptr inbounds [22 x i8], ptr %b, i32 0, i32 2
  call void @llvm.memcpy.p0.p0.i32(ptr %a, ptr %d, i32 20, i1 false)
  %e = getelementptr inbounds [22 x i8], ptr %b, i32 0, i32 6
  call void @llvm.memcpy.p0.p0.i32(ptr %0, ptr %e, i32 12, i1 false)
  ret void
}

declare void @llvm.memcpy.p0.p0.i32(ptr, ptr, i32, i1)