| Evgeniy Stepanov | 76d5ac4 | 2017-11-13 20:45:38 +0000 | [diff] [blame] | 1 | ; PR35221. Test that external global address is not reloaded from GOT in each BB. |
| 2 | ; RUN: llc < %s -mtriple=armv7-linux-gnueabi -relocation-model=pic | FileCheck %s -check-prefix=LINUX-PIC |
| 3 | |
| 4 | @x = external global i8, align 1 |
| 5 | |
| 6 | define signext i8 @foo() { |
| 7 | entry: |
| 8 | ; LINUX-PIC: ldr r[[A:.]], .LCPI0_0 |
| 9 | ; LINUX-PIC: ldr r[[B:.]], [pc, r[[A]]] |
| 10 | ; LINUX-PIC: ldrb r{{.}}, [r[[B]]] |
| 11 | %0 = load i8, i8* @x |
| 12 | %tobool = icmp eq i8 %0, 0 |
| 13 | br i1 %tobool, label %bb1, label %bb2 |
| 14 | |
| 15 | bb1: |
| 16 | call void @bar() |
| 17 | ; No more pc-relative loads! Reuse r[[B]]. |
| 18 | ; LINUX-PIC: bl bar |
| 19 | ; LINUX-PIC-NOT: ldr{{.*}}[pc, |
| 20 | ; LINUX-PIC: ldrsb r{{.}}, [r[[B]]] |
| 21 | %1 = load i8, i8* @x |
| 22 | ret i8 %1 |
| 23 | |
| 24 | bb2: |
| 25 | ret i8 0 |
| 26 | } |
| 27 | |
| 28 | declare void @bar() |
| 29 | |
| 30 | |