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compiler: add nounwind attribute

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This attribute is also set by Clang when it compiles C source files
(unless -fexceptions is set). The advantage is that no unwind tables are
emitted on Linux (and perhaps other systems). It also avoids
__aeabi_unwind_cpp_pr0 on ARM when using the musl libc.
This commit is contained in:
Ayke van Laethem
2021-09-13 18:19:26 +02:00
committed by Ron Evans
parent 112b369636
commit 478dd3a28d
18 changed files with 357 additions and 199 deletions
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compiler/testdata/pragma.ll
Vendored
+19 -13
View File
@@ -12,48 +12,54 @@ target triple = "wasm32-unknown-wasi"
declare noalias nonnull i8* @runtime.alloc(i32, i8*, i8*)
define hidden void @main.init(i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden void @main.init(i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
ret void
}
define void @extern_func() #0 {
; Function Attrs: nounwind
define void @extern_func() #1 {
entry:
ret void
}
define hidden void @somepkg.someFunction1(i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden void @somepkg.someFunction1(i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
ret void
}
declare void @somepkg.someFunction2(i8*, i8*)
; Function Attrs: inlinehint
define hidden void @main.inlineFunc(i8* %context, i8* %parentHandle) unnamed_addr #1 {
; Function Attrs: inlinehint nounwind
define hidden void @main.inlineFunc(i8* %context, i8* %parentHandle) unnamed_addr #2 {
entry:
ret void
}
; Function Attrs: noinline
define hidden void @main.noinlineFunc(i8* %context, i8* %parentHandle) unnamed_addr #2 {
; Function Attrs: noinline nounwind
define hidden void @main.noinlineFunc(i8* %context, i8* %parentHandle) unnamed_addr #3 {
entry:
ret void
}
define hidden void @main.functionInSection(i8* %context, i8* %parentHandle) unnamed_addr section ".special_function_section" {
; Function Attrs: nounwind
define hidden void @main.functionInSection(i8* %context, i8* %parentHandle) unnamed_addr #0 section ".special_function_section" {
entry:
ret void
}
define void @exportedFunctionInSection() #3 section ".special_function_section" {
; Function Attrs: nounwind
define void @exportedFunctionInSection() #4 section ".special_function_section" {
entry:
ret void
}
declare void @main.undefinedFunctionNotInSection(i8*, i8*)
attributes #0 = { "wasm-export-name"="extern_func" }
attributes #1 = { inlinehint }
attributes #2 = { noinline }
attributes #3 = { "wasm-export-name"="exportedFunctionInSection" }
attributes #0 = { nounwind }
attributes #1 = { nounwind "wasm-export-name"="extern_func" }
attributes #2 = { inlinehint nounwind }
attributes #3 = { noinline nounwind }
attributes #4 = { nounwind "wasm-export-name"="exportedFunctionInSection" }