File: load-global2.ll

package info (click to toggle)
llvm-toolchain-11 1%3A11.0.1-2~deb10u1
  • links: PTS, VCS
  • area: main
  • in suites: buster
  • size: 995,836 kB
  • sloc: cpp: 4,767,656; ansic: 760,916; asm: 477,436; python: 170,940; objc: 69,804; lisp: 29,914; sh: 23,855; f90: 18,173; pascal: 7,551; perl: 7,471; ml: 5,603; awk: 3,489; makefile: 2,573; xml: 915; cs: 573; fortran: 503; javascript: 452
file content (30 lines) | stat: -rw-r--r-- 712 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
20
21
22
23
24
25
26
27
28
29
30
 
; PR35221. Test that external global address is not reloaded from GOT in each BB.
; RUN: llc < %s -mtriple=armv7-linux-gnueabi -relocation-model=pic | FileCheck %s -check-prefix=LINUX-PIC

@x = external global i8, align 1

define signext i8 @foo() {
entry:
; LINUX-PIC:     ldr	r[[A:.]], .LCPI0_0
; LINUX-PIC:     ldr	r[[B:.]], [pc, r[[A]]]
; LINUX-PIC:     ldrb	r{{.}}, [r[[B]]]
  %0 = load i8, i8* @x
  %tobool = icmp eq i8 %0, 0
  br i1 %tobool, label %bb1, label %bb2

bb1:
  call void @bar()
; No more pc-relative loads! Reuse r[[B]].
; LINUX-PIC:     bl	bar
; LINUX-PIC-NOT: ldr{{.*}}[pc,
; LINUX-PIC:     ldrsb	r{{.}}, [r[[B]]]
  %1 = load i8, i8* @x
  ret i8 %1

bb2:
  ret i8 0
}

declare void @bar()