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9f1012760e
This ensures that symbolic relocations are generated for stack pointer manipulations. These relocations are of type R_WEBASSEMBLY_GLOBAL_INDEX_LEB. This change also adds support for reading relocations of this type in WasmObjectFile.cpp. Since its a globally imported symbol this does mean that the get_global/set_global instruction won't be valid until the objects are linked that global used in no longer an imported global. Differential Revision: https://reviews.llvm.org/D34172 llvm-svn: 305616
128 lines
5.3 KiB
LLVM
128 lines
5.3 KiB
LLVM
; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -disable-wasm-explicit-locals -verify-machineinstrs | FileCheck %s
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; RUN: llc < %s -asm-verbose=false -disable-wasm-fallthrough-return-opt -disable-wasm-explicit-locals -verify-machineinstrs -fast-isel | FileCheck %s
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target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
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target triple = "wasm32-unknown-unknown-wasm"
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%SmallStruct = type { i32 }
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%OddStruct = type { i32, i8, i32 }
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%AlignedStruct = type { double, double }
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%BigStruct = type { double, double, double, double, double, double, double, double, double, double, double, i8, i8, i8 }
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%EmptyStruct = type { }
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%BigArray = type { [33 x i8] }
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declare void @ext_func(%SmallStruct*)
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declare void @ext_func_empty(%EmptyStruct* byval)
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declare void @ext_byval_func(%SmallStruct* byval)
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declare void @ext_byval_func_align8(%SmallStruct* byval align 8)
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declare void @ext_byval_func_alignedstruct(%AlignedStruct* byval)
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declare void @ext_byval_func_bigarray(%BigArray* byval)
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declare void @ext_byval_func_empty(%EmptyStruct* byval)
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; CHECK-LABEL: byval_arg
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define void @byval_arg(%SmallStruct* %ptr) {
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; CHECK: .param i32
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; Subtract 16 from SP (SP is 16-byte aligned)
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; CHECK-NEXT: get_global $push[[L2:.+]]=, __stack_pointer
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; CHECK-NEXT: i32.const $push[[L3:.+]]=, 16
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; CHECK-NEXT: i32.sub $push[[L11:.+]]=, $pop[[L2]], $pop[[L3]]
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; Ensure SP is stored back before the call
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; CHECK-NEXT: tee_local $push[[L10:.+]]=, $[[SP:.+]]=, $pop[[L11]]{{$}}
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; CHECK-NEXT: set_global __stack_pointer, $pop[[L10]]{{$}}
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; Copy the SmallStruct argument to the stack (SP+12, original SP-4)
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; CHECK-NEXT: i32.load $push[[L0:.+]]=, 0($0)
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; CHECK-NEXT: i32.store 12($[[SP]]), $pop[[L0]]
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; Pass a pointer to the stack slot to the function
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; CHECK-NEXT: i32.const $push[[L5:.+]]=, 12{{$}}
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; CHECK-NEXT: i32.add $push[[ARG:.+]]=, $[[SP]], $pop[[L5]]{{$}}
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; CHECK-NEXT: call ext_byval_func@FUNCTION, $pop[[ARG]]{{$}}
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call void @ext_byval_func(%SmallStruct* byval %ptr)
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; Restore the stack
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; CHECK-NEXT: i32.const $push[[L6:.+]]=, 16
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; CHECK-NEXT: i32.add $push[[L8:.+]]=, $[[SP]], $pop[[L6]]
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; CHECK-NEXT: set_global __stack_pointer, $pop[[L8]]
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; CHECK-NEXT: return
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ret void
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}
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; CHECK-LABEL: byval_arg_align8
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define void @byval_arg_align8(%SmallStruct* %ptr) {
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; CHECK: .param i32
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; Don't check the entire SP sequence, just enough to get the alignment.
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; CHECK: i32.const $push[[L1:.+]]=, 16
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; CHECK-NEXT: i32.sub $push[[L11:.+]]=, {{.+}}, $pop[[L1]]
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; CHECK-NEXT: tee_local $push[[L10:.+]]=, $[[SP:.+]]=, $pop[[L11]]{{$}}
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; CHECK-NEXT: set_global __stack_pointer, $pop[[L10]]{{$}}
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; Copy the SmallStruct argument to the stack (SP+8, original SP-8)
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; CHECK-NEXT: i32.load $push[[L0:.+]]=, 0($0){{$}}
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; CHECK-NEXT: i32.store 8($[[SP]]), $pop[[L0]]{{$}}
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; Pass a pointer to the stack slot to the function
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; CHECK-NEXT: i32.const $push[[L5:.+]]=, 8{{$}}
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; CHECK-NEXT: i32.add $push[[ARG:.+]]=, $[[SP]], $pop[[L5]]{{$}}
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; CHECK-NEXT: call ext_byval_func_align8@FUNCTION, $pop[[ARG]]{{$}}
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call void @ext_byval_func_align8(%SmallStruct* byval align 8 %ptr)
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ret void
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}
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; CHECK-LABEL: byval_arg_double
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define void @byval_arg_double(%AlignedStruct* %ptr) {
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; CHECK: .param i32
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; Subtract 16 from SP (SP is 16-byte aligned)
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; CHECK: i32.const $push[[L1:.+]]=, 16
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; CHECK-NEXT: i32.sub $push[[L14:.+]]=, {{.+}}, $pop[[L1]]
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; CHECK-NEXT: tee_local $push[[L13:.+]]=, $[[SP:.+]]=, $pop[[L14]]
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; CHECK-NEXT: set_global __stack_pointer, $pop[[L13]]
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; Copy the AlignedStruct argument to the stack (SP+0, original SP-16)
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; Just check the last load/store pair of the memcpy
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; CHECK: i64.load $push[[L4:.+]]=, 0($0)
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; CHECK-NEXT: i64.store 0($[[SP]]), $pop[[L4]]
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; Pass a pointer to the stack slot to the function
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; CHECK-NEXT: call ext_byval_func_alignedstruct@FUNCTION, $[[SP]]
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tail call void @ext_byval_func_alignedstruct(%AlignedStruct* byval %ptr)
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ret void
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}
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; CHECK-LABEL: byval_param
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define void @byval_param(%SmallStruct* byval align 32 %ptr) {
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; CHECK: .param i32
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; %ptr is just a pointer to a struct, so pass it directly through
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; CHECK: call ext_func@FUNCTION, $0
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call void @ext_func(%SmallStruct* %ptr)
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ret void
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}
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; CHECK-LABEL: byval_empty_caller
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define void @byval_empty_caller(%EmptyStruct* %ptr) {
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; CHECK: .param i32
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; CHECK: call ext_byval_func_empty@FUNCTION, $0
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call void @ext_byval_func_empty(%EmptyStruct* byval %ptr)
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ret void
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}
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; CHECK-LABEL: byval_empty_callee
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define void @byval_empty_callee(%EmptyStruct* byval %ptr) {
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; CHECK: .param i32
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; CHECK: call ext_func_empty@FUNCTION, $0
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call void @ext_func_empty(%EmptyStruct* %ptr)
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ret void
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}
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; Call memcpy for "big" byvals.
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; CHECK-LABEL: big_byval:
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; CHECK: get_global $push[[L2:.+]]=, __stack_pointer{{$}}
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; CHECK-NEXT: i32.const $push[[L3:.+]]=, 131072
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; CHECK-NEXT: i32.sub $push[[L11:.+]]=, $pop[[L2]], $pop[[L3]]
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; CHECK-NEXT: tee_local $push[[L10:.+]]=, $[[SP:.+]]=, $pop[[L11]]{{$}}
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; CHECK-NEXT: set_global __stack_pointer, $pop[[L10]]{{$}}
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; CHECK-NEXT: i32.const $push[[L0:.+]]=, 131072
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; CHECK-NEXT: i32.call $push[[L11:.+]]=, memcpy@FUNCTION, $[[SP]], ${{.+}}, $pop{{.+}}
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; CHECK-NEXT: tee_local $push[[L9:.+]]=, $[[SP:.+]]=, $pop[[L11]]{{$}}
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; CHECK-NEXT: call big_byval_callee@FUNCTION,
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%big = type [131072 x i8]
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declare void @big_byval_callee(%big* byval align 1)
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define void @big_byval(%big* byval align 1 %x) {
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call void @big_byval_callee(%big* byval align 1 %x)
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ret void
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}
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