File: phi-load-metadata-dominance.ll

package info (click to toggle)
llvm-toolchain-13 1%3A13.0.1-11
  • links: PTS, VCS
  • area: main
  • in suites: bookworm
  • size: 1,418,840 kB
  • sloc: cpp: 5,290,826; ansic: 996,570; asm: 544,593; python: 188,212; objc: 72,027; lisp: 30,291; f90: 25,395; sh: 24,898; javascript: 9,780; pascal: 9,398; perl: 7,484; ml: 5,432; awk: 3,523; makefile: 2,913; xml: 953; cs: 573; fortran: 539
file content (26 lines) | stat: -rw-r--r-- 601 bytes parent folder | download | duplicates (10)
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 -instcombine -S < %s | FileCheck %s

declare void @bar()
declare void @baz()

; Check that nonnull metadata is from non-dominating loads is not propagated.
; CHECK-LABEL: cont:
; CHECK-NOT: !nonnull
define i32* @test_combine_metadata_dominance(i1 %c, i32** dereferenceable(8) %p1, i32** dereferenceable(8) %p2) {
  br i1 %c, label %t, label %f
t:
  call void @bar()
  %v1 = load i32*, i32** %p1, align 8, !nonnull !0
  br label %cont

f:
  call void @baz()
  %v2 = load i32*, i32** %p2, align 8
  br label %cont

cont:
  %res = phi i32* [ %v1, %t ], [ %v2, %f ]
  ret i32* %res
}

!0 = !{}