[ARM] GlobalISel: Select globals in PIC mode
Support the selection of G_GLOBAL_VALUE in the PIC relocation model. For
simplicity we use the same pseudoinstructions for both Darwin and ELF:
(MOV|LDRLIT)_ga_pcrel(_ldr).
This is new for ELF, so it requires a small update to the ARM pseudo
expansion pass to make sure it adds the correct constant pool modifier
and add-current-address in the case of ELF.
Differential Revision: https://reviews.llvm.org/D36507
llvm-svn: 311992
diff --git a/llvm/lib/Target/ARM/ARMExpandPseudoInsts.cpp b/llvm/lib/Target/ARM/ARMExpandPseudoInsts.cpp
index 1a5b7d2..18fd077 100644
--- a/llvm/lib/Target/ARM/ARMExpandPseudoInsts.cpp
+++ b/llvm/lib/Target/ARM/ARMExpandPseudoInsts.cpp
@@ -1308,9 +1308,11 @@
if (IsPIC) {
unsigned PCAdj = IsARM ? 8 : 4;
+ auto Modifier = STI->getCPModifier(GV);
ARMPCLabelIndex = AFI->createPICLabelUId();
- CPV = ARMConstantPoolConstant::Create(GV, ARMPCLabelIndex,
- ARMCP::CPValue, PCAdj);
+ CPV = ARMConstantPoolConstant::Create(
+ GV, ARMPCLabelIndex, ARMCP::CPValue, PCAdj, Modifier,
+ /*AddCurrentAddr*/ Modifier == ARMCP::GOT_PREL);
} else
CPV = ARMConstantPoolConstant::Create(GV, ARMCP::no_modifier);