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llvm-mirror/test/CodeGen/ARM/tail-call-weak.ll
Martin Storsjö 407a0e7a75 [ARM] [Windows] Use COFF stubs for calls to extern_weak functions
As the extern_weak target might be missing, resolving to the absolute
address zero, we can't use the normal direct PC-relative branch
instructions (as that would result in relocations out of range).

Instead check the shouldAssumeDSOLocal method and load the address
from a COFF stub.

This matches what was done for X86 in 6bf108d77a3c.

Differential Revision: https://reviews.llvm.org/D71720
2019-12-23 12:13:49 +02:00

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634 B
LLVM

; RUN: llc -mtriple thumbv7-windows-coff -filetype asm -o - %s | FileCheck %s -check-prefix CHECK-COFF
; RUN: llc -mtriple thumbv7-elf -filetype asm -o - %s | FileCheck %s -check-prefix CHECK-OTHER
; RUN: llc -mtriple thumbv7-macho -filetype asm -o - %s | FileCheck %s -check-prefix CHECK-OTHER
declare i8* @f()
declare extern_weak i8* @g(i8*)
define void @test() {
%call = tail call i8* @f()
%call1 = tail call i8* @g(i8* %call)
ret void
}
; CHECK-COFF: movw r0, :lower16:.refptr.g
; CHECK-COFF: movt r0, :upper16:.refptr.g
; CHECK-COFF: ldr r4, [r0]
; CHECK-COFF: mov r1, r4
; CHECK-COFF: bx r1
; CHECK-OTHER: bl {{_?}}g