[llvm-branch-commits] [lld] [lld][LoongArch] Convert TLS IE to LE in the normal or medium code model (PR #123680)

[Lu Weining via llvm-branch-commits]

================
@@ -0,0 +1,70 @@
+# REQUIRES: loongarch
+## Test LA64 IE -> LE in various cases.
+
+# RUN: llvm-mc --filetype=obj --triple=loongarch64 -mattr=+relax %s -o %t.o
+
+## FIXME: IE relaxation has not yet been implemented.
+## --relax/--no-relax has the same result. Also check --emit-relocs.
+# RUN: ld.lld --emit-relocs %t.o -o %t
+# RUN: llvm-readelf -x .got %t 2>&1 | FileCheck --check-prefix=LE-GOT %s
+# RUN: llvm-objdump -dr --no-show-raw-insn %t | FileCheck --check-prefixes=LE %s
+
+# RUN: ld.lld --emit-relocs --no-relax %t.o -o %t.norelax
+# RUN: llvm-readelf -x .got %t.norelax 2>&1 | FileCheck --check-prefix=LE-GOT %s
+# RUN: llvm-objdump -dr --no-show-raw-insn %t.norelax | FileCheck --check-prefixes=LE %s
+
+# LE-GOT: could not find section '.got'
+
+# a at tprel = st_value(a) = 0xfff
+# b at tprel = st_value(a) = 0x1000
+# LE:      20158: nop
+# LE-NEXT:          R_LARCH_TLS_IE_PC_HI20 a
+# LE-NEXT:          R_LARCH_RELAX   *ABS*
+# LE-NEXT:        ori     $a0, $zero, 4095
+# LE-NEXT:          R_LARCH_TLS_IE_PC_LO12 a
+# LE-NEXT:          R_LARCH_RELAX   *ABS*
+# LE-NEXT:        add.d   $a0, $a0, $tp
+# LE-NEXT: 20164: lu12i.w $a1, 1
+# LE-NEXT:          R_LARCH_TLS_IE_PC_HI20 b
+# LE-NEXT:        ori     $a1, $a1, 0
+# LE-NEXT:          R_LARCH_TLS_IE_PC_LO12 b
+# LE-NEXT:        add.d   $a1, $a1, $tp
+# LE-NEXT: 20170: nop
+# LE-NEXT:          R_LARCH_TLS_IE_PC_HI20 a
+# LE-NEXT:          R_LARCH_RELAX   *ABS*
+# LE-NEXT:        lu12i.w $a3, 1
+# LE-NEXT:          R_LARCH_TLS_IE_PC_HI20 b
+# LE-NEXT:          R_LARCH_RELAX   *ABS*
+# LE-NEXT:        ori     $a2, $zero, 4095
+# LE-NEXT:          R_LARCH_TLS_IE_PC_LO12 a
+# LE-NEXT:        ori     $a3, $a3, 0
+# LE-NEXT:          R_LARCH_TLS_IE_PC_LO12 b
+# LE-NEXT:        add.d   $a2, $a2, $tp
+# LE-NEXT:        add.d   $a3, $a3, $tp
+
+la.tls.ie $a0, a    # relax
+add.d $a0, $a0, $tp
+
+# PCALAU12I does not have R_LARCH_RELAX. No relaxation.
+pcalau12i $a1, %ie_pc_hi20(b)
+ld.d $a1, $a1, %ie_pc_lo12(b)
+add.d $a1, $a1, $tp
+
+# Test instructions are interleaved.
+# PCALAU12I has an R_LARCH_RELAX. We preform relaxation.
----------------
SixWeining wrote:

```suggestion
# PCALAU12I has an R_LARCH_RELAX. We perform relaxation.
```

https://github.com/llvm/llvm-project/pull/123680