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[WebAssembly] Fix stack pointer relocations 

This line was mistakenly deleted in rL319813

Add a test for stackpointer relocations.

Differential Revision: https://reviews.llvm.org/D40847

llvm-svn: 319828
This commit is contained in:
Sam Clegg 2017-12-05 20:38:22 +00:00
parent 795ab0d94d
commit b3974ffda0
2 changed files with 68 additions and 0 deletions
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67
lld/test/wasm/stack-pointer.ll Normal file
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@ -0,0 +1,67 @@
; RUN: llc -filetype=obj %s -o %t.o
; RUN: lld -flavor wasm --emit-relocs -o %t.wasm %t.o
; RUN: obj2yaml %t.wasm | FileCheck %s
target datalayout = "e-m:e-p:32:32-i64:64-n32:64-S128"
target triple = "wasm32-unknown-unknown-wasm"
; Function Attrs: nounwind
define hidden i32 @_start() local_unnamed_addr {
entry:
%retval = alloca i32, align 4
ret i32 0
}
; CHECK: --- !WASM
; CHECK-NEXT: FileHeader:
; CHECK-NEXT: Version: 0x00000001
; CHECK-NEXT: Sections:
; CHECK-NEXT: - Type: TYPE
; CHECK-NEXT: Signatures:
; CHECK-NEXT: - Index: 0
; CHECK-NEXT: ReturnType: I32
; CHECK-NEXT: ParamTypes:
; CHECK-NEXT: - Type: FUNCTION
; CHECK-NEXT: FunctionTypes: [ 0 ]
; CHECK-NEXT: - Type: TABLE
; CHECK-NEXT: Tables:
; CHECK-NEXT: - ElemType: ANYFUNC
; CHECK-NEXT: Limits:
; CHECK-NEXT: Flags: 0x00000001
; CHECK-NEXT: Initial: 0x00000001
; CHECK-NEXT: Maximum: 0x00000001
; CHECK-NEXT: - Type: MEMORY
; CHECK-NEXT: Memories:
; CHECK-NEXT: - Initial: 0x00000002
; CHECK-NEXT: - Type: GLOBAL
; CHECK-NEXT: Globals:
; CHECK-NEXT: - Type: I32
; CHECK-NEXT: Mutable: true
; CHECK-NEXT: InitExpr:
; CHECK-NEXT: Opcode: I32_CONST
; CHECK-NEXT: Value: 66560
; CHECK-NEXT: - Type: EXPORT
; CHECK-NEXT: Exports:
; CHECK-NEXT: - Name: memory
; CHECK-NEXT: Kind: MEMORY
; CHECK-NEXT: Index: 0
; CHECK-NEXT: - Name: _start
; CHECK-NEXT: Kind: FUNCTION
; CHECK-NEXT: Index: 0
; CHECK-NEXT: - Type: CODE
; CHECK-NEXT: Relocations:
; CHECK-NEXT: - Type: R_WEBASSEMBLY_GLOBAL_INDEX_LEB
; CHECK-NEXT: Index: 0
; CHECK-NEXT: Offset: 0x00000004
; CHECK-NEXT: Functions:
; CHECK-NEXT: - Locals:
; CHECK-NEXT: Body: 23808080800041106B1A41000B
; CHECK-NEXT: - Type: CUSTOM
; CHECK-NEXT: Name: linking
; CHECK-NEXT: DataSize: 0
; CHECK-NEXT: - Type: CUSTOM
; CHECK-NEXT: Name: name
; CHECK-NEXT: FunctionNames:
; CHECK-NEXT: - Index: 0
; CHECK-NEXT: Name: _start
; CHECK-NEXT: ...

1
lld/wasm/Driver.cpp
View File

@ -142,6 +142,7 @@ static Symbol* addSyntheticGlobal(StringRef Name, int32_t Value) {
log("injecting global: " + Name);
Symbol *S = Symtab->addDefinedGlobal(Name);
S->setVirtualAddress(Value);
S->setOutputIndex(Config->SyntheticGlobals.size());
Config->SyntheticGlobals.emplace_back(S);
return S;
}