From 265ebd7d70496049d49021b4eb5eabffcf291b7d Mon Sep 17 00:00:00 2001 From: Peter Collingbourne Date: Fri, 22 Apr 2016 20:40:10 +0000 Subject: CodeGen: Use PLT relocations for relative references to unnamed_addr functions. The relative vtable ABI (PR26723) needs PLT relocations to refer to virtual functions defined in other DSOs. The unnamed_addr attribute means that the function's address is not significant, so we're allowed to substitute it with the address of a PLT entry. Also includes a bonus feature: addends for COFF image-relative references. Differential Revision: http://reviews.llvm.org/D17938 llvm-svn: 267211 --- llvm/test/CodeGen/ARM/plt-relative-reloc.ll | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) create mode 100644 llvm/test/CodeGen/ARM/plt-relative-reloc.ll (limited to 'llvm/test/CodeGen/ARM') diff --git a/llvm/test/CodeGen/ARM/plt-relative-reloc.ll b/llvm/test/CodeGen/ARM/plt-relative-reloc.ll new file mode 100644 index 00000000000..08dcfdf1298 --- /dev/null +++ b/llvm/test/CodeGen/ARM/plt-relative-reloc.ll @@ -0,0 +1,16 @@ +; RUN: llc -mtriple=armv7-unknown-linux -o - %s | FileCheck %s + +@vtable = constant [4 x i32] [i32 0, + i32 sub (i32 ptrtoint (void ()* @fn1 to i32), i32 ptrtoint (i32* getelementptr ([4 x i32], [4 x i32]* @vtable, i32 0, i32 1) to i32)), + i32 sub (i32 ptrtoint (void ()* @fn2 to i32), i32 ptrtoint (i32* getelementptr ([4 x i32], [4 x i32]* @vtable, i32 0, i32 1) to i32)), + i32 sub (i32 ptrtoint (void ()* @fn3 to i32), i32 ptrtoint (i32* getelementptr ([4 x i32], [4 x i32]* @vtable, i32 0, i32 1) to i32)) +] + +declare void @fn1() unnamed_addr +declare void @fn2() unnamed_addr +declare void @fn3() + +; CHECK: .long 0 +; CHECK-NEXT: .long (fn1(prel31)-vtable)-4 +; CHECK-NEXT: .long (fn2(prel31)-vtable)-4 +; CHECK-NEXT: .long (fn3-vtable)-4 -- cgit v1.2.3