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5737f73fac
This patch allows lowering of PIC addresses by using PC-relative addressing for DSO-local symbols and accessing the address through the global offset table for non-DSO-local symbols. Differential Revision: https://reviews.llvm.org/D55303 llvm-svn: 363058
86 lines
2.7 KiB
LLVM
86 lines
2.7 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc -mtriple=riscv32 -relocation-model=static < %s \
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; RUN: | FileCheck -check-prefix=RV32-STATIC %s
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; RUN: llc -mtriple=riscv32 -relocation-model=pic < %s \
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; RUN: | FileCheck -check-prefix=RV32-PIC %s
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; RUN: llc -mtriple=riscv64 -relocation-model=static < %s \
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; RUN: | FileCheck -check-prefix=RV64-STATIC %s
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; RUN: llc -mtriple=riscv64 -relocation-model=pic < %s \
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; RUN: | FileCheck -check-prefix=RV64-PIC %s
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; Check basic lowering of PIC addressing.
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; TODO: Check other relocation models?
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@external_var = external global i32
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@internal_var = internal global i32 42
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; external address
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define i32* @f1() nounwind {
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; RV32-STATIC-LABEL: f1:
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; RV32-STATIC: # %bb.0: # %entry
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; RV32-STATIC-NEXT: lui a0, %hi(external_var)
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; RV32-STATIC-NEXT: addi a0, a0, %lo(external_var)
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; RV32-STATIC-NEXT: ret
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;
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; RV32-PIC-LABEL: f1:
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; RV32-PIC: # %bb.0: # %entry
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; RV32-PIC-NEXT: .LBB0_1: # %entry
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; RV32-PIC-NEXT: # Label of block must be emitted
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; RV32-PIC-NEXT: auipc a0, %got_pcrel_hi(external_var)
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; RV32-PIC-NEXT: lw a0, %pcrel_lo(.LBB0_1)(a0)
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; RV32-PIC-NEXT: ret
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;
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; RV64-STATIC-LABEL: f1:
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; RV64-STATIC: # %bb.0: # %entry
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; RV64-STATIC-NEXT: lui a0, %hi(external_var)
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; RV64-STATIC-NEXT: addi a0, a0, %lo(external_var)
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; RV64-STATIC-NEXT: ret
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;
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; RV64-PIC-LABEL: f1:
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; RV64-PIC: # %bb.0: # %entry
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; RV64-PIC-NEXT: .LBB0_1: # %entry
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; RV64-PIC-NEXT: # Label of block must be emitted
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; RV64-PIC-NEXT: auipc a0, %got_pcrel_hi(external_var)
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; RV64-PIC-NEXT: ld a0, %pcrel_lo(.LBB0_1)(a0)
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; RV64-PIC-NEXT: ret
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entry:
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ret i32* @external_var
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}
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; internal address
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define i32* @f2() nounwind {
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; RV32-STATIC-LABEL: f2:
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; RV32-STATIC: # %bb.0: # %entry
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; RV32-STATIC-NEXT: lui a0, %hi(internal_var)
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; RV32-STATIC-NEXT: addi a0, a0, %lo(internal_var)
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; RV32-STATIC-NEXT: ret
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;
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; RV32-PIC-LABEL: f2:
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; RV32-PIC: # %bb.0: # %entry
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; RV32-PIC-NEXT: .LBB1_1: # %entry
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; RV32-PIC-NEXT: # Label of block must be emitted
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; RV32-PIC-NEXT: auipc a0, %pcrel_hi(internal_var)
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; RV32-PIC-NEXT: addi a0, a0, %pcrel_lo(.LBB1_1)
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; RV32-PIC-NEXT: ret
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;
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; RV64-STATIC-LABEL: f2:
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; RV64-STATIC: # %bb.0: # %entry
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; RV64-STATIC-NEXT: lui a0, %hi(internal_var)
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; RV64-STATIC-NEXT: addi a0, a0, %lo(internal_var)
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; RV64-STATIC-NEXT: ret
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;
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; RV64-PIC-LABEL: f2:
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; RV64-PIC: # %bb.0: # %entry
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; RV64-PIC-NEXT: .LBB1_1: # %entry
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; RV64-PIC-NEXT: # Label of block must be emitted
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; RV64-PIC-NEXT: auipc a0, %pcrel_hi(internal_var)
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; RV64-PIC-NEXT: addi a0, a0, %pcrel_lo(.LBB1_1)
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; RV64-PIC-NEXT: ret
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entry:
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ret i32* @internal_var
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}
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