| ; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py |
| ; 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() { |
| ; LINUX-PIC-LABEL: foo: |
| ; LINUX-PIC: @ %bb.0: @ %entry |
| ; LINUX-PIC-NEXT: .save {r4, lr} |
| ; LINUX-PIC-NEXT: push {r4, lr} |
| ; LINUX-PIC-NEXT: ldr r4, .LCPI0_0 |
| ; LINUX-PIC-NEXT: mov r0, #0 |
| ; LINUX-PIC-NEXT: .LPC0_0: |
| ; LINUX-PIC-NEXT: ldr r4, [pc, r4] |
| ; LINUX-PIC-NEXT: ldrb r1, [r4] |
| ; LINUX-PIC-NEXT: cmp r1, #0 |
| ; LINUX-PIC-NEXT: beq .LBB0_2 |
| ; LINUX-PIC-NEXT: @ %bb.1: @ %common.ret |
| ; LINUX-PIC-NEXT: sxtb r0, r0 |
| ; LINUX-PIC-NEXT: pop {r4, pc} |
| ; LINUX-PIC-NEXT: .LBB0_2: @ %bb1 |
| ; LINUX-PIC-NEXT: bl bar |
| ; LINUX-PIC-NEXT: ldrb r0, [r4] |
| ; LINUX-PIC-NEXT: sxtb r0, r0 |
| ; LINUX-PIC-NEXT: pop {r4, pc} |
| ; LINUX-PIC-NEXT: .p2align 2 |
| ; LINUX-PIC-NEXT: @ %bb.3: |
| ; LINUX-PIC-NEXT: .LCPI0_0: |
| ; LINUX-PIC-NEXT: .Ltmp0: |
| ; LINUX-PIC-NEXT: .long x(GOT_PREL)-((.LPC0_0+8)-.Ltmp0) |
| entry: |
| %0 = load i8, ptr @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]]. |
| %1 = load i8, ptr @x |
| ret i8 %1 |
| |
| bb2: |
| ret i8 0 |
| } |
| |
| declare void @bar() |
| |
| |
