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llvm-mirror/test/CodeGen/Thumb2/tls2.ll
David Peixotto b6710ff7c7 Add support for parsing ARM symbol variants on ELF targets
ARM symbol variants are written with parens instead of @ like this:

  .word __GLOBAL_I_a(target1)

This commit adds support for parsing these symbol variants in
expressions. We introduce a new flag to MCAsmInfo that indicates the
parser should use parens to parse the symbol variant. The expression
parser is modified to look for symbol variants using parens instead
of @ when the corresponding MCAsmInfo flag is true.

The MCAsmInfo parens flag is enabled only for ARM on ELF.

By adding this flag to MCAsmInfo, we are able to get rid of
redundant ARM-specific symbol variants and use the generic variants
instead (e.g. VK_GOT instead of VK_ARM_GOT). We use the new
UseParensForSymbolVariant attribute in MCAsmInfo to correctly print
the symbol variants for arm.

To achive this we need to keep a handle to the MCAsmInfo in the
MCSymbolRefExpr class that we can check when printing the symbol
variant.

Updated Tests:
  Changed case of symbol variant to match the generic kind.
  test/CodeGen/ARM/tls-models.ll
  test/CodeGen/ARM/tls1.ll
  test/CodeGen/ARM/tls2.ll
  test/CodeGen/Thumb2/tls1.ll
  test/CodeGen/Thumb2/tls2.ll

PR18080

llvm-svn: 196424
2013-12-04 22:43:20 +00:00

30 lines
727 B
LLVM

; RUN: llc < %s -mtriple=thumbv7-linux-gnueabi | FileCheck %s -check-prefix=CHECK-NOT-PIC
; RUN: llc < %s -mtriple=thumbv7-linux-gnueabi -relocation-model=pic | FileCheck %s -check-prefix=CHECK-PIC
@i = external thread_local global i32 ; <i32*> [#uses=2]
define i32 @f() {
entry:
; CHECK-NOT-PIC-LABEL: f:
; CHECK-NOT-PIC: add r0, pc
; CHECK-NOT-PIC: ldr r1, [r0]
; CHECK-NOT-PIC: i(GOTTPOFF)
; CHECK-PIC-LABEL: f:
; CHECK-PIC: bl __tls_get_addr(PLT)
%tmp1 = load i32* @i ; <i32> [#uses=1]
ret i32 %tmp1
}
define i32* @g() {
entry:
; CHECK-NOT-PIC-LABEL: g:
; CHECK-NOT-PIC: add r0, pc
; CHECK-NOT-PIC: ldr r1, [r0]
; CHECK-NOT-PIC: i(GOTTPOFF)
; CHECK-PIC-LABEL: g:
; CHECK-PIC: bl __tls_get_addr(PLT)
ret i32* @i
}