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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/channel.ll
Vendored
+21 -14
View File
@@ -11,12 +11,14 @@ 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 void @main.chanIntSend(%runtime.channel* dereferenceable_or_null(32) %ch, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden void @main.chanIntSend(%runtime.channel* dereferenceable_or_null(32) %ch, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%chan.blockedList = alloca %runtime.channelBlockedList, align 8
%chan.value = alloca i32, align 4
@@ -25,21 +27,22 @@ entry:
store i32 3, i32* %chan.value, align 4
%chan.blockedList.bitcast = bitcast %runtime.channelBlockedList* %chan.blockedList to i8*
call void @llvm.lifetime.start.p0i8(i64 24, i8* nonnull %chan.blockedList.bitcast)
call void @runtime.chanSend(%runtime.channel* %ch, i8* nonnull %chan.value.bitcast, %runtime.channelBlockedList* nonnull %chan.blockedList, i8* undef, i8* null)
call void @runtime.chanSend(%runtime.channel* %ch, i8* nonnull %chan.value.bitcast, %runtime.channelBlockedList* nonnull %chan.blockedList, i8* undef, i8* null) #0
call void @llvm.lifetime.end.p0i8(i64 24, i8* nonnull %chan.blockedList.bitcast)
call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %chan.value.bitcast)
ret void
}
; Function Attrs: argmemonly nounwind willreturn
declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #0
declare void @llvm.lifetime.start.p0i8(i64 immarg, i8* nocapture) #1
declare void @runtime.chanSend(%runtime.channel* dereferenceable_or_null(32), i8*, %runtime.channelBlockedList* dereferenceable_or_null(24), i8*, i8*)
; Function Attrs: argmemonly nounwind willreturn
declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #0
declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture) #1
define hidden void @main.chanIntRecv(%runtime.channel* dereferenceable_or_null(32) %ch, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden void @main.chanIntRecv(%runtime.channel* dereferenceable_or_null(32) %ch, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%chan.blockedList = alloca %runtime.channelBlockedList, align 8
%chan.value = alloca i32, align 4
@@ -47,7 +50,7 @@ entry:
call void @llvm.lifetime.start.p0i8(i64 4, i8* nonnull %chan.value.bitcast)
%chan.blockedList.bitcast = bitcast %runtime.channelBlockedList* %chan.blockedList to i8*
call void @llvm.lifetime.start.p0i8(i64 24, i8* nonnull %chan.blockedList.bitcast)
%0 = call i1 @runtime.chanRecv(%runtime.channel* %ch, i8* nonnull %chan.value.bitcast, %runtime.channelBlockedList* nonnull %chan.blockedList, i8* undef, i8* null)
%0 = call i1 @runtime.chanRecv(%runtime.channel* %ch, i8* nonnull %chan.value.bitcast, %runtime.channelBlockedList* nonnull %chan.blockedList, i8* undef, i8* null) #0
call void @llvm.lifetime.end.p0i8(i64 4, i8* nonnull %chan.value.bitcast)
call void @llvm.lifetime.end.p0i8(i64 24, i8* nonnull %chan.blockedList.bitcast)
ret void
@@ -55,27 +58,30 @@ entry:
declare i1 @runtime.chanRecv(%runtime.channel* dereferenceable_or_null(32), i8*, %runtime.channelBlockedList* dereferenceable_or_null(24), i8*, i8*)
define hidden void @main.chanZeroSend(%runtime.channel* dereferenceable_or_null(32) %ch, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden void @main.chanZeroSend(%runtime.channel* dereferenceable_or_null(32) %ch, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%chan.blockedList = alloca %runtime.channelBlockedList, align 8
%chan.blockedList.bitcast = bitcast %runtime.channelBlockedList* %chan.blockedList to i8*
call void @llvm.lifetime.start.p0i8(i64 24, i8* nonnull %chan.blockedList.bitcast)
call void @runtime.chanSend(%runtime.channel* %ch, i8* null, %runtime.channelBlockedList* nonnull %chan.blockedList, i8* undef, i8* null)
call void @runtime.chanSend(%runtime.channel* %ch, i8* null, %runtime.channelBlockedList* nonnull %chan.blockedList, i8* undef, i8* null) #0
call void @llvm.lifetime.end.p0i8(i64 24, i8* nonnull %chan.blockedList.bitcast)
ret void
}
define hidden void @main.chanZeroRecv(%runtime.channel* dereferenceable_or_null(32) %ch, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden void @main.chanZeroRecv(%runtime.channel* dereferenceable_or_null(32) %ch, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%chan.blockedList = alloca %runtime.channelBlockedList, align 8
%chan.blockedList.bitcast = bitcast %runtime.channelBlockedList* %chan.blockedList to i8*
call void @llvm.lifetime.start.p0i8(i64 24, i8* nonnull %chan.blockedList.bitcast)
%0 = call i1 @runtime.chanRecv(%runtime.channel* %ch, i8* null, %runtime.channelBlockedList* nonnull %chan.blockedList, i8* undef, i8* null)
%0 = call i1 @runtime.chanRecv(%runtime.channel* %ch, i8* null, %runtime.channelBlockedList* nonnull %chan.blockedList, i8* undef, i8* null) #0
call void @llvm.lifetime.end.p0i8(i64 24, i8* nonnull %chan.blockedList.bitcast)
ret void
}
define hidden void @main.selectZeroRecv(%runtime.channel* dereferenceable_or_null(32) %ch1, %runtime.channel* dereferenceable_or_null(32) %ch2, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden void @main.selectZeroRecv(%runtime.channel* dereferenceable_or_null(32) %ch1, %runtime.channel* dereferenceable_or_null(32) %ch2, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%select.states.alloca = alloca [2 x %runtime.chanSelectState], align 8
%select.send.value = alloca i32, align 4
@@ -92,7 +98,7 @@ entry:
%.repack4 = getelementptr inbounds [2 x %runtime.chanSelectState], [2 x %runtime.chanSelectState]* %select.states.alloca, i32 0, i32 1, i32 1
store i8* null, i8** %.repack4, align 4
%select.states = getelementptr inbounds [2 x %runtime.chanSelectState], [2 x %runtime.chanSelectState]* %select.states.alloca, i32 0, i32 0
%select.result = call { i32, i1 } @runtime.tryChanSelect(i8* undef, %runtime.chanSelectState* nonnull %select.states, i32 2, i32 2, i8* undef, i8* null)
%select.result = call { i32, i1 } @runtime.tryChanSelect(i8* undef, %runtime.chanSelectState* nonnull %select.states, i32 2, i32 2, i8* undef, i8* null) #0
call void @llvm.lifetime.end.p0i8(i64 16, i8* nonnull %select.states.alloca.bitcast)
%1 = extractvalue { i32, i1 } %select.result, 0
%2 = icmp eq i32 %1, 0
@@ -111,4 +117,5 @@ select.body: ; preds = %select.next
declare { i32, i1 } @runtime.tryChanSelect(i8*, %runtime.chanSelectState*, i32, i32, i8*, i8*)
attributes #0 = { argmemonly nounwind willreturn }
attributes #0 = { nounwind }
attributes #1 = { argmemonly nounwind willreturn }