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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/string.ll
Vendored
+22 -12
View File
@@ -9,33 +9,38 @@ 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 hidden %runtime._string @main.someString(i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden %runtime._string @main.someString(i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
ret %runtime._string { i8* getelementptr inbounds ([3 x i8], [3 x i8]* @"main.someString$string", i32 0, i32 0), i32 3 }
}
define hidden %runtime._string @main.zeroLengthString(i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden %runtime._string @main.zeroLengthString(i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
ret %runtime._string zeroinitializer
}
define hidden i32 @main.stringLen(i8* %s.data, i32 %s.len, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden i32 @main.stringLen(i8* %s.data, i32 %s.len, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
ret i32 %s.len
}
define hidden i8 @main.stringIndex(i8* %s.data, i32 %s.len, i32 %index, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden i8 @main.stringIndex(i8* %s.data, i32 %s.len, i32 %index, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%.not = icmp ult i32 %index, %s.len
br i1 %.not, label %lookup.next, label %lookup.throw
lookup.throw: ; preds = %entry
call void @runtime.lookupPanic(i8* undef, i8* null)
call void @runtime.lookupPanic(i8* undef, i8* null) #0
unreachable
lookup.next: ; preds = %entry
@@ -46,26 +51,31 @@ lookup.next: ; preds = %entry
declare void @runtime.lookupPanic(i8*, i8*)
define hidden i1 @main.stringCompareEqual(i8* %s1.data, i32 %s1.len, i8* %s2.data, i32 %s2.len, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden i1 @main.stringCompareEqual(i8* %s1.data, i32 %s1.len, i8* %s2.data, i32 %s2.len, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%0 = call i1 @runtime.stringEqual(i8* %s1.data, i32 %s1.len, i8* %s2.data, i32 %s2.len, i8* undef, i8* null)
%0 = call i1 @runtime.stringEqual(i8* %s1.data, i32 %s1.len, i8* %s2.data, i32 %s2.len, i8* undef, i8* null) #0
ret i1 %0
}
declare i1 @runtime.stringEqual(i8*, i32, i8*, i32, i8*, i8*)
define hidden i1 @main.stringCompareUnequal(i8* %s1.data, i32 %s1.len, i8* %s2.data, i32 %s2.len, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden i1 @main.stringCompareUnequal(i8* %s1.data, i32 %s1.len, i8* %s2.data, i32 %s2.len, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%0 = call i1 @runtime.stringEqual(i8* %s1.data, i32 %s1.len, i8* %s2.data, i32 %s2.len, i8* undef, i8* null)
%0 = call i1 @runtime.stringEqual(i8* %s1.data, i32 %s1.len, i8* %s2.data, i32 %s2.len, i8* undef, i8* null) #0
%1 = xor i1 %0, true
ret i1 %1
}
define hidden i1 @main.stringCompareLarger(i8* %s1.data, i32 %s1.len, i8* %s2.data, i32 %s2.len, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden i1 @main.stringCompareLarger(i8* %s1.data, i32 %s1.len, i8* %s2.data, i32 %s2.len, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%0 = call i1 @runtime.stringLess(i8* %s1.data, i32 %s1.len, i8* %s2.data, i32 %s2.len, i8* undef, i8* null)
%0 = call i1 @runtime.stringLess(i8* %s1.data, i32 %s1.len, i8* %s2.data, i32 %s2.len, i8* undef, i8* null) #0
%1 = xor i1 %0, true
ret i1 %1
}
declare i1 @runtime.stringLess(i8*, i32, i8*, i32, i8*, i8*)
attributes #0 = { nounwind }