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[WebAssebmly] Add support for --wrap
The code for implementing this features is taken almost verbatim from the ELF backend. Fixes: https://bugs.llvm.org/show_bug.cgi?id=41681 Differential Revision: https://reviews.llvm.org/D62380 llvm-svn: 361639
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,40 @@ | ||
; RUN: llc -filetype=obj %s -o %t.o | ||
; RUN: wasm-ld -wrap nosuchsym -wrap foo -o %t.wasm %t.o | ||
; RUN: wasm-ld -emit-relocs -wrap foo -o %t.wasm %t.o | ||
; RUN: obj2yaml %t.wasm | FileCheck %s | ||
|
||
target triple = "wasm32-unknown-unknown" | ||
|
||
define i32 @foo() { | ||
ret i32 1 | ||
} | ||
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||
define void @_start() { | ||
entry: | ||
call i32 @foo() | ||
ret void | ||
} | ||
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declare i32 @__real_foo() | ||
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define i32 @__wrap_foo() { | ||
%rtn = call i32 @__real_foo() | ||
ret i32 %rtn | ||
} | ||
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; CHECK: - Type: CODE | ||
; CHECK-NEXT: Relocations: | ||
; CHECK-NEXT: - Type: R_WASM_FUNCTION_INDEX_LEB | ||
; CHECK-NEXT: Index: 2 | ||
; CHECK-NEXT: Offset: 0x00000009 | ||
; CHECK-NEXT: - Type: R_WASM_FUNCTION_INDEX_LEB | ||
; CHECK-NEXT: Index: 0 | ||
; CHECK-NEXT: Offset: 0x00000013 | ||
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||
; CHECK: FunctionNames: | ||
; CHECK-NEXT: - Index: 0 | ||
; CHECK-NEXT: Name: foo | ||
; CHECK-NEXT: - Index: 1 | ||
; CHECK-NEXT: Name: _start | ||
; CHECK-NEXT: - Index: 2 | ||
; CHECK-NEXT: Name: __wrap_foo |
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