File: load-global2.ll

package info (click to toggle)
llvm-toolchain-9 1%3A9.0.1-16
  • links: PTS, VCS
  • area: main
  • in suites: bullseye
  • size: 882,436 kB
  • sloc: cpp: 4,167,636; ansic: 714,256; asm: 457,610; python: 155,927; objc: 65,094; sh: 42,856; lisp: 26,908; perl: 7,786; pascal: 7,722; makefile: 6,881; ml: 5,581; awk: 3,648; cs: 2,027; xml: 888; javascript: 381; ruby: 156
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()