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TheRock/compiler/amd-llvm/lld/test/wasm/reloc-addend.s
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derek.holloway 7502bf64a4
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Flatten subprojects into a single base monorepo
2026-09-02 16:34:47 -07:00

91 lines
2.6 KiB
ArmAsm

# RUN: llvm-mc -filetype=obj -triple=wasm32-unknown-unknown -o %t.o %s
# RUN: wasm-ld -r -o %t.wasm %t.o
# RUN: obj2yaml %t.wasm | FileCheck %s
# RUN: llvm-objdump --disassemble-symbols=_start --no-show-raw-insn --no-leading-addr %t.wasm | FileCheck %s --check-prefixes DIS
.hidden foo
.hidden bar
.globl foo
.globl bar
# Similar to what would be generated from: `int foo[76]`
.section .bss.foo,"",@
.p2align 4
foo:
.skip 304
.size foo, 304
# bar contains a pointer to the 16th element of foo, which happens to be 64
# bytes in. This generates an addend of 64 which is the value at which signed
# and unsigned LEB encodes will differ.
.section .data.bar,"",@
.p2align 2
bar:
.int32 foo+64
.size bar, 4
# Check that negative addends also work here
.section .data.negative_addend,"",@
.p2align 2
negative_addend:
.int32 foo-16
.size negative_addend, 4
.globl _start
.section .text,"",@
_start:
.functype _start () -> ()
i32.const 0
i32.load foo + 10
drop
i32.const 0
i32.load foo - 10
drop
i32.const 0
# This will underflow because i32.load (and the
# corresponding relocation type) take an unsgiend (U32)
# immediate.
i32.load foo - 2048
drop
end_function
# CHECK: - Type: CODE
# CHECK-NEXT: Relocations:
# CHECK-NEXT: - Type: R_WASM_MEMORY_ADDR_LEB
# CHECK-NEXT: Index: 0
# CHECK-NEXT: Offset: 0x7
# CHECK-NEXT: Addend: 10
# CHECK-NEXT: - Type: R_WASM_MEMORY_ADDR_LEB
# CHECK-NEXT: Index: 0
# CHECK-NEXT: Offset: 0x11
# CHECK-NEXT: Addend: -10
# CHECK-NEXT: - Type: R_WASM_MEMORY_ADDR_LEB
# CHECK-NEXT: Index: 0
# CHECK-NEXT: Offset: 0x1B
# CHECK-NEXT: Addend: -2048
# CHECK: - Type: DATA
# CHECK-NEXT: Relocations:
# CHECK-NEXT: - Type: R_WASM_MEMORY_ADDR_I32
# CHECK-NEXT: Index: 0
# CHECK-NEXT: Offset: 0x6
# CHECK-NEXT: Addend: 64
# CHECK-NEXT: - Type: R_WASM_MEMORY_ADDR_I32
# CHECK-NEXT: Index: 0
# CHECK-NEXT: Offset: 0xF
# CHECK-NEXT: Addend: -16
# DIS: <_start>:
# DIS-EMPTY:
# DIS-NEXT: i32.const 0
# DIS-NEXT: i32.load 26
# DIS-NEXT: drop
# DIS-NEXT: i32.const 0
# DIS-NEXT: i32.load 6
# DIS-NEXT: drop
# DIS-NEXT: i32.const 0
# TODO(sbc): We should probably error here rather than allowing u32 to wrap
# DIS-NEXT: i32.load 4294965264
# DIS-NEXT: drop
# DIS-NEXT: end