; RUN: llc < %s --mtriple=wasm32-unknown-emscripten -asm-verbose=false -relocation-model=pic -fast-isel -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck %s -check-prefixes=PIC,CHECK -DPTR=i32
; RUN: llc < %s --mtriple=wasm32-unknown-emscripten -asm-verbose=false -relocation-model=pic -fast-isel=false -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck %s -check-prefixes=PIC,CHECK -DPTR=i32
; RUN: llc < %s --mtriple=wasm64-unknown-emscripten -asm-verbose=false -relocation-model=pic -fast-isel -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck %s -check-prefixes=PIC,CHECK -DPTR=i64
; RUN: llc < %s --mtriple=wasm64-unknown-emscripten -asm-verbose=false -relocation-model=pic -fast-isel=false -wasm-disable-explicit-locals -wasm-keep-registers | FileCheck %s -check-prefixes=PIC,CHECK -DPTR=i64
; Test that globals assemble as expected with -fPIC.
; We test here both with and without fast-isel.
@hidden_global = external hidden global i32
@hidden_global_array = external hidden global [10 x i32]
@external_global = external global i32
@external_global_array = external global [10 x i32]
; PIC: .globaltype __memory_base, [[PTR]]
declare i32 @foo();
; For hidden symbols PIC code needs to offset all loads and stores
; by the value of the __memory_base global
define i32 @load_hidden_global() {
; CHECK-LABEL: load_hidden_global:
; PIC: global.get $push[[L0:[0-9]+]]=, __memory_base{{$}}
; PIC-NEXT: [[PTR]].const $push[[L1:[0-9]+]]=, hidden_global@MBREL{{$}}
; PIC-NEXT: [[PTR]].add $push[[L2:[0-9]+]]=, $pop[[L0]], $pop[[L1]]{{$}}
; PIC-NEXT: i32.load $push[[L3:[0-9]+]]=, 0($pop[[L2]]){{$}}
; CHECK-NEXT: end_function
%1 = load i32, ptr @hidden_global
ret i32 %1
}
define i32 @load_hidden_global_offset() {
; CHECK-LABEL: load_hidden_global_offset:
; PIC: global.get $push[[L0:[0-9]+]]=, __memory_base{{$}}
; PIC-NEXT: [[PTR]].const $push[[L1:[0-9]+]]=, hidden_global_array@MBREL{{$}}
; PIC-NEXT: [[PTR]].add $push[[L2:[0-9]+]]=, $pop[[L0]], $pop[[L1:[0-9]+]]{{$}}
; PIC-NEXT: [[PTR]].const $push[[L3:[0-9]+]]=, 20{{$}}
; PIC-NEXT: [[PTR]].add $push[[L4:[0-9]+]]=, $pop[[L2]], $pop[[L3]]{{$}}
; PIC-NEXT: i32.load $push{{[0-9]+}}=, 0($pop[[L4]]){{$}}
; CHECK-NEXT: end_function
%1 = getelementptr [10 x i32], ptr @hidden_global_array, i32 0, i32 5
%2 = load i32, ptr %1
ret i32 %2
}
; Store to a hidden global
define void @store_hidden_global(i32 %n) {
; CHECK-LABEL: store_hidden_global:
; PIC: global.get $push[[L0:[0-9]+]]=, __memory_base{{$}}
; PIC-NEXT: [[PTR]].const $push[[L1:[0-9]+]]=, hidden_global@MBREL{{$}}
; PIC-NEXT: [[PTR]].add $push[[L2:[0-9]+]]=, $pop[[L0]], $pop[[L1]]{{$}}
; PIC-NEXT: i32.store 0($pop[[L2]]), $0{{$}}
; CHECK-NEXT: end_function
store i32 %n, ptr @hidden_global
ret void
}
define void @store_hidden_global_offset(i32 %n) {
; CHECK-LABEL: store_hidden_global_offset:
; PIC: global.get $push[[L0:[0-9]+]]=, __memory_base{{$}}
; PIC-NEXT: [[PTR]].const $push[[L1:[0-9]+]]=, hidden_global_array@MBREL{{$}}
; PIC-NEXT: [[PTR]].add $push[[L2:[0-9]+]]=, $pop[[L0]], $pop[[L1]]{{$}}
; PIC-NEXT: [[PTR]].const $push[[L3:[0-9]+]]=, 20{{$}}
; PIC-NEXT: [[PTR]].add $push[[L4:[0-9]+]]=, $pop[[L2]], $pop[[L3]]{{$}}
; PIC-NEXT: i32.store 0($pop[[L4]]), $0{{$}}
; CHECK-NEXT: end_function
%1 = getelementptr [10 x i32], ptr @hidden_global_array, i32 0, i32 5
store i32 %n, ptr %1
ret void
}
; For non-hidden globals PIC code has to load the address from a wasm global
; using the @GOT relocation type.
define i32 @load_external_global() {
; CHECK-LABEL: load_external_global:
; PIC: global.get $push[[L0:[0-9]+]]=, external_global@GOT{{$}}
; PIC-NEXT: i32.load $push{{[0-9]+}}=, 0($pop[[L0]]){{$}}
; CHECK-NEXT: end_function
%1 = load i32, ptr @external_global
ret i32 %1
}
define i32 @load_external_global_offset() {
; CHECK-LABEL: load_external_global_offset:
; PIC: global.get $push[[L0:[0-9]+]]=, external_global_array@GOT{{$}}
; PIC-NEXT: [[PTR]].const $push[[L1:[0-9]+]]=, 20{{$}}
; PIC-NEXT: [[PTR]].add $push[[L2:[0-9]+]]=, $pop[[L0]], $pop[[L1]]{{$}}
; PIC-NEXT: i32.load $push{{[0-9]+}}=, 0($pop[[L2]]){{$}}
; CHECK-NEXT: end_function
%1 = getelementptr [10 x i32], ptr @external_global_array, i32 0, i32 5
%2 = load i32, ptr %1
ret i32 %2
}
; Store to a non-hidden global via the wasm global.
define void @store_external_global(i32 %n) {
; CHECK-LABEL: store_external_global:
; PIC: global.get $push[[L0:[0-9]+]]=, external_global@GOT{{$}}
; PIC-NEXT: i32.store 0($pop[[L0]]), $0{{$}}
; CHECK-NEXT: end_function
store i32 %n, ptr @external_global
ret void
}
define void @store_external_global_offset(i32 %n) {
; CHECK-LABEL: store_external_global_offset:
; PIC: global.get $push[[L0:[0-9]+]]=, external_global_array@GOT{{$}}
; PIC-NEXT: [[PTR]].const $push[[L1:[0-9]+]]=, 20{{$}}
; PIC-NEXT: [[PTR]].add $push[[L2:[0-9]+]]=, $pop[[L0]], $pop[[L1]]{{$}}
; PIC-NEXT: i32.store 0($pop[[L2]]), $0{{$}}
; CHECK-NEXT: end_function
%1 = getelementptr [10 x i32], ptr @external_global_array, i32 0, i32 5
store i32 %n, ptr %1
ret void
}
Codebase Browser
llvm