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| author | Peter Collingbourne <peter@pcc.me.uk> | 2016-04-22 20:40:10 +0000 |
|---|---|---|
| committer | Peter Collingbourne <peter@pcc.me.uk> | 2016-04-22 20:40:10 +0000 |
| commit | 265ebd7d70496049d49021b4eb5eabffcf291b7d (patch) | |
| tree | 4812863753534f9ff90358e0e120efa8bbcac6b8 /llvm/test/CodeGen/ARM | |
| parent | eedef73b633496ca52af265b472519f0e385a7d2 (diff) | |
| download | bcm5719-llvm-265ebd7d70496049d49021b4eb5eabffcf291b7d.tar.gz bcm5719-llvm-265ebd7d70496049d49021b4eb5eabffcf291b7d.zip | |
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
Diffstat (limited to 'llvm/test/CodeGen/ARM')
| -rw-r--r-- | llvm/test/CodeGen/ARM/plt-relative-reloc.ll | 16 |
1 files changed, 16 insertions, 0 deletions
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 |
