a62b86a3e6
There is no PIC support for -mcmodel=large (https://github.com/ARM-software/abi-aa/blob/main/sysvabi64/sysvabi64.rst) and Clang recently rejects -mcmodel= with PIC (#70262). The current backend code assumes that the large code model is non-PIC. This patch adds `!getTargetMachine().isPositionIndependent()` conditions to clarify that the support is non-PIC only. In addition, add some tests as change detectors in case PIC large code model is supported in the future. If other front-ends/JITs use the large code model with PIC, they will get small code model code sequence, instead of potentially-incorrect MOVZ/MOVK sequence, which is only suitable for non-PIC. The sequence will cause text relocations using ELF linkers. (The small code model code sequence is usually sufficient as ADRP+ADD or ADRP+LDR targets [-2**32,2**32), which has a doubled range of x86-64 R_X86_64_REX_GOTPCRELX/R_X86_64_PC32 [-2**32,2**32).)
145 lines
4.2 KiB
LLVM
145 lines
4.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 3
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; RUN: llc -mtriple=aarch64-linux-gnu -code-model=large -o - %s | FileCheck %s --check-prefix=STATIC
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; RUN: llc -mtriple=aarch64-linux-gnu -code-model=large -relocation-model=pic -o - %s | FileCheck %s --check-prefix=PIC
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@var8 = dso_local global i8 0
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@var16 = dso_local global i16 0
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@var32 = dso_local global i32 0
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@var64 = dso_local global i64 0
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define dso_local ptr @global_addr() {
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;
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; STATIC-LABEL: global_addr:
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; STATIC: // %bb.0:
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; STATIC-NEXT: movz x0, #:abs_g0_nc:var8
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; STATIC-NEXT: movk x0, #:abs_g1_nc:var8
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; STATIC-NEXT: movk x0, #:abs_g2_nc:var8
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; STATIC-NEXT: movk x0, #:abs_g3:var8
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; STATIC-NEXT: ret
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;
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; PIC-LABEL: global_addr:
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; PIC: .Lglobal_addr$local:
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; PIC-NEXT: .type .Lglobal_addr$local,@function
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; PIC-NEXT: .cfi_startproc
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; PIC-NEXT: // %bb.0:
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; PIC-NEXT: adrp x0, .Lvar8$local
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; PIC-NEXT: add x0, x0, :lo12:.Lvar8$local
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; PIC-NEXT: ret
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ret ptr @var8
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; The movz/movk calculation should end up returned directly in x0.
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}
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define dso_local i8 @global_i8() {
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;
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; STATIC-LABEL: global_i8:
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; STATIC: // %bb.0:
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; STATIC-NEXT: movz x8, #:abs_g0_nc:var8
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; STATIC-NEXT: movk x8, #:abs_g1_nc:var8
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; STATIC-NEXT: movk x8, #:abs_g2_nc:var8
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; STATIC-NEXT: movk x8, #:abs_g3:var8
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; STATIC-NEXT: ldrb w0, [x8]
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; STATIC-NEXT: ret
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;
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; PIC-LABEL: global_i8:
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; PIC: .Lglobal_i8$local:
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; PIC-NEXT: .type .Lglobal_i8$local,@function
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; PIC-NEXT: .cfi_startproc
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; PIC-NEXT: // %bb.0:
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; PIC-NEXT: adrp x8, .Lvar8$local
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; PIC-NEXT: ldrb w0, [x8, :lo12:.Lvar8$local]
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; PIC-NEXT: ret
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%val = load i8, ptr @var8
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ret i8 %val
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}
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define dso_local i16 @global_i16() {
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;
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; STATIC-LABEL: global_i16:
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; STATIC: // %bb.0:
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; STATIC-NEXT: movz x8, #:abs_g0_nc:var16
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; STATIC-NEXT: movk x8, #:abs_g1_nc:var16
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; STATIC-NEXT: movk x8, #:abs_g2_nc:var16
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; STATIC-NEXT: movk x8, #:abs_g3:var16
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; STATIC-NEXT: ldrh w0, [x8]
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; STATIC-NEXT: ret
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;
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; PIC-LABEL: global_i16:
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; PIC: .Lglobal_i16$local:
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; PIC-NEXT: .type .Lglobal_i16$local,@function
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; PIC-NEXT: .cfi_startproc
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; PIC-NEXT: // %bb.0:
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; PIC-NEXT: adrp x8, .Lvar16$local
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; PIC-NEXT: ldrh w0, [x8, :lo12:.Lvar16$local]
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; PIC-NEXT: ret
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%val = load i16, ptr @var16
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ret i16 %val
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}
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define dso_local i32 @global_i32() {
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;
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; STATIC-LABEL: global_i32:
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; STATIC: // %bb.0:
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; STATIC-NEXT: movz x8, #:abs_g0_nc:var32
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; STATIC-NEXT: movk x8, #:abs_g1_nc:var32
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; STATIC-NEXT: movk x8, #:abs_g2_nc:var32
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; STATIC-NEXT: movk x8, #:abs_g3:var32
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; STATIC-NEXT: ldr w0, [x8]
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; STATIC-NEXT: ret
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;
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; PIC-LABEL: global_i32:
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; PIC: .Lglobal_i32$local:
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; PIC-NEXT: .type .Lglobal_i32$local,@function
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; PIC-NEXT: .cfi_startproc
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; PIC-NEXT: // %bb.0:
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; PIC-NEXT: adrp x8, .Lvar32$local
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; PIC-NEXT: ldr w0, [x8, :lo12:.Lvar32$local]
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; PIC-NEXT: ret
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%val = load i32, ptr @var32
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ret i32 %val
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}
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define dso_local i64 @global_i64() {
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;
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; STATIC-LABEL: global_i64:
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; STATIC: // %bb.0:
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; STATIC-NEXT: movz x8, #:abs_g0_nc:var64
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; STATIC-NEXT: movk x8, #:abs_g1_nc:var64
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; STATIC-NEXT: movk x8, #:abs_g2_nc:var64
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; STATIC-NEXT: movk x8, #:abs_g3:var64
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; STATIC-NEXT: ldr x0, [x8]
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; STATIC-NEXT: ret
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;
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; PIC-LABEL: global_i64:
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; PIC: .Lglobal_i64$local:
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; PIC-NEXT: .type .Lglobal_i64$local,@function
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; PIC-NEXT: .cfi_startproc
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; PIC-NEXT: // %bb.0:
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; PIC-NEXT: adrp x8, .Lvar64$local
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; PIC-NEXT: ldr x0, [x8, :lo12:.Lvar64$local]
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; PIC-NEXT: ret
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%val = load i64, ptr @var64
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ret i64 %val
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}
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define dso_local <2 x i64> @constpool() {
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;
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; STATIC-LABEL: constpool:
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; STATIC: // %bb.0:
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; STATIC-NEXT: movz x8, #:abs_g0_nc:.LCPI5_0
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; STATIC-NEXT: movk x8, #:abs_g1_nc:.LCPI5_0
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; STATIC-NEXT: movk x8, #:abs_g2_nc:.LCPI5_0
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; STATIC-NEXT: movk x8, #:abs_g3:.LCPI5_0
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; STATIC-NEXT: ldr q0, [x8]
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; STATIC-NEXT: ret
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;
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; PIC-LABEL: constpool:
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; PIC: .Lconstpool$local:
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; PIC-NEXT: .type .Lconstpool$local,@function
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; PIC-NEXT: .cfi_startproc
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; PIC-NEXT: // %bb.0:
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; PIC-NEXT: adrp x8, .LCPI5_0
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; PIC-NEXT: ldr q0, [x8, :lo12:.LCPI5_0]
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; PIC-NEXT: ret
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ret <2 x i64> <i64 123456789, i64 987654321100>
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}
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