f180339d6b
This gives a small improvement now, and is needed to be able to use the
Heap2Stack transform that's available in the Attributor pass. This
Heap2Stack transform could replace our custom OptimizeAllocs pass.
Most of the changes are just IR that changed, the actual change is
relatively small.
To give an example of why this is useful, here is the code size before
this change:
$ tinygo build -o test -size=short ./testdata/stdlib.go
code data bss | flash ram
95620 1812 968 | 97432 2780
$ tinygo build -o test -size=short ./testdata/stdlib.go
code data bss | flash ram
95380 1812 968 | 97192 2780
That's a 0.25% reduction. Not a whole lot, but nice for such a small
patch.
117 строки
5,6 КиБ
LLVM
117 строки
5,6 КиБ
LLVM
; ModuleID = 'channel.go'
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source_filename = "channel.go"
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target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"
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target triple = "wasm32-unknown-wasi"
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%runtime.channelBlockedList = type { ptr, ptr, ptr, { ptr, i32, i32 } }
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%runtime.chanSelectState = type { ptr, ptr }
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; Function Attrs: allockind("alloc,zeroed") allocsize(0)
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declare noalias nonnull ptr @runtime.alloc(i32, ptr, ptr) #0
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declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #1
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; Function Attrs: nounwind
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define hidden void @main.init(ptr %context) unnamed_addr #2 {
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entry:
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ret void
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}
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; Function Attrs: nounwind
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define hidden void @main.chanIntSend(ptr dereferenceable_or_null(32) %ch, ptr %context) unnamed_addr #2 {
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entry:
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%chan.blockedList = alloca %runtime.channelBlockedList, align 8
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%chan.value = alloca i32, align 4
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call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %chan.value)
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store i32 3, ptr %chan.value, align 4
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call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %chan.blockedList)
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call void @runtime.chanSend(ptr %ch, ptr nonnull %chan.value, ptr nonnull %chan.blockedList, ptr undef) #4
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call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %chan.blockedList)
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call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %chan.value)
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ret void
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}
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; Function Attrs: argmemonly nocallback nofree nosync nounwind willreturn
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declare void @llvm.lifetime.start.p0(i64 immarg, ptr nocapture) #3
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declare void @runtime.chanSend(ptr dereferenceable_or_null(32), ptr, ptr dereferenceable_or_null(24), ptr) #1
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; Function Attrs: argmemonly nocallback nofree nosync nounwind willreturn
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declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture) #3
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; Function Attrs: nounwind
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define hidden void @main.chanIntRecv(ptr dereferenceable_or_null(32) %ch, ptr %context) unnamed_addr #2 {
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entry:
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%chan.blockedList = alloca %runtime.channelBlockedList, align 8
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%chan.value = alloca i32, align 4
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call void @llvm.lifetime.start.p0(i64 4, ptr nonnull %chan.value)
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call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %chan.blockedList)
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%0 = call i1 @runtime.chanRecv(ptr %ch, ptr nonnull %chan.value, ptr nonnull %chan.blockedList, ptr undef) #4
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call void @llvm.lifetime.end.p0(i64 4, ptr nonnull %chan.value)
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call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %chan.blockedList)
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ret void
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}
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declare i1 @runtime.chanRecv(ptr dereferenceable_or_null(32), ptr, ptr dereferenceable_or_null(24), ptr) #1
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; Function Attrs: nounwind
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define hidden void @main.chanZeroSend(ptr dereferenceable_or_null(32) %ch, ptr %context) unnamed_addr #2 {
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entry:
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%complit = alloca {}, align 8
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%chan.blockedList = alloca %runtime.channelBlockedList, align 8
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%stackalloc = alloca i8, align 1
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call void @runtime.trackPointer(ptr nonnull %complit, ptr nonnull %stackalloc, ptr undef) #4
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call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %chan.blockedList)
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call void @runtime.chanSend(ptr %ch, ptr null, ptr nonnull %chan.blockedList, ptr undef) #4
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call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %chan.blockedList)
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ret void
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}
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; Function Attrs: nounwind
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define hidden void @main.chanZeroRecv(ptr dereferenceable_or_null(32) %ch, ptr %context) unnamed_addr #2 {
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entry:
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%chan.blockedList = alloca %runtime.channelBlockedList, align 8
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call void @llvm.lifetime.start.p0(i64 24, ptr nonnull %chan.blockedList)
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%0 = call i1 @runtime.chanRecv(ptr %ch, ptr null, ptr nonnull %chan.blockedList, ptr undef) #4
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call void @llvm.lifetime.end.p0(i64 24, ptr nonnull %chan.blockedList)
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ret void
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}
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; Function Attrs: nounwind
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define hidden void @main.selectZeroRecv(ptr dereferenceable_or_null(32) %ch1, ptr dereferenceable_or_null(32) %ch2, ptr %context) unnamed_addr #2 {
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entry:
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%select.states.alloca = alloca [2 x %runtime.chanSelectState], align 8
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%select.send.value = alloca i32, align 4
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store i32 1, ptr %select.send.value, align 4
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call void @llvm.lifetime.start.p0(i64 16, ptr nonnull %select.states.alloca)
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store ptr %ch1, ptr %select.states.alloca, align 8
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%select.states.alloca.repack1 = getelementptr inbounds %runtime.chanSelectState, ptr %select.states.alloca, i32 0, i32 1
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store ptr %select.send.value, ptr %select.states.alloca.repack1, align 4
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%0 = getelementptr inbounds [2 x %runtime.chanSelectState], ptr %select.states.alloca, i32 0, i32 1
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store ptr %ch2, ptr %0, align 8
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%.repack3 = getelementptr inbounds [2 x %runtime.chanSelectState], ptr %select.states.alloca, i32 0, i32 1, i32 1
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store ptr null, ptr %.repack3, align 4
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%select.result = call { i32, i1 } @runtime.tryChanSelect(ptr undef, ptr nonnull %select.states.alloca, i32 2, i32 2, ptr undef) #4
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call void @llvm.lifetime.end.p0(i64 16, ptr nonnull %select.states.alloca)
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%1 = extractvalue { i32, i1 } %select.result, 0
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%2 = icmp eq i32 %1, 0
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br i1 %2, label %select.done, label %select.next
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select.done: ; preds = %select.body, %select.next, %entry
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ret void
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select.next: ; preds = %entry
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%3 = icmp eq i32 %1, 1
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br i1 %3, label %select.body, label %select.done
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select.body: ; preds = %select.next
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br label %select.done
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}
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declare { i32, i1 } @runtime.tryChanSelect(ptr, ptr, i32, i32, ptr) #1
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attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" }
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attributes #1 = { "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" }
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attributes #2 = { nounwind "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" }
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attributes #3 = { argmemonly nocallback nofree nosync nounwind willreturn }
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attributes #4 = { nounwind }
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