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compiler: add alloc attributes to runtime.alloc

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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.
This commit is contained in:
Ayke van Laethem
2023-03-11 20:57:40 +01:00
committed by Ron Evans
parent 5ed0cecf0d
commit f180339d6b
17 changed files with 504 additions and 447 deletions
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compiler/testdata/string.ll
Vendored
+23 -21
View File
@@ -7,36 +7,37 @@ target triple = "wasm32-unknown-wasi"
@"main$string" = internal unnamed_addr constant [3 x i8] c"foo", align 1
; Function Attrs: allockind("alloc,zeroed") allocsize(0)
declare noalias nonnull ptr @runtime.alloc(i32, ptr, ptr) #0
declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #0
declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #1
; Function Attrs: nounwind
define hidden void @main.init(ptr %context) unnamed_addr #1 {
define hidden void @main.init(ptr %context) unnamed_addr #2 {
entry:
ret void
}
; Function Attrs: nounwind
define hidden %runtime._string @main.someString(ptr %context) unnamed_addr #1 {
define hidden %runtime._string @main.someString(ptr %context) unnamed_addr #2 {
entry:
ret %runtime._string { ptr @"main$string", i32 3 }
}
; Function Attrs: nounwind
define hidden %runtime._string @main.zeroLengthString(ptr %context) unnamed_addr #1 {
define hidden %runtime._string @main.zeroLengthString(ptr %context) unnamed_addr #2 {
entry:
ret %runtime._string zeroinitializer
}
; Function Attrs: nounwind
define hidden i32 @main.stringLen(ptr %s.data, i32 %s.len, ptr %context) unnamed_addr #1 {
define hidden i32 @main.stringLen(ptr %s.data, i32 %s.len, ptr %context) unnamed_addr #2 {
entry:
ret i32 %s.len
}
; Function Attrs: nounwind
define hidden i8 @main.stringIndex(ptr %s.data, i32 %s.len, i32 %index, ptr %context) unnamed_addr #1 {
define hidden i8 @main.stringIndex(ptr %s.data, i32 %s.len, i32 %index, ptr %context) unnamed_addr #2 {
entry:
%.not = icmp ult i32 %index, %s.len
br i1 %.not, label %lookup.next, label %lookup.throw
@@ -47,40 +48,40 @@ lookup.next: ; preds = %entry
ret i8 %1
lookup.throw: ; preds = %entry
call void @runtime.lookupPanic(ptr undef) #2
call void @runtime.lookupPanic(ptr undef) #3
unreachable
}
declare void @runtime.lookupPanic(ptr) #0
declare void @runtime.lookupPanic(ptr) #1
; Function Attrs: nounwind
define hidden i1 @main.stringCompareEqual(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr %context) unnamed_addr #1 {
define hidden i1 @main.stringCompareEqual(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr %context) unnamed_addr #2 {
entry:
%0 = call i1 @runtime.stringEqual(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr undef) #2
%0 = call i1 @runtime.stringEqual(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr undef) #3
ret i1 %0
}
declare i1 @runtime.stringEqual(ptr, i32, ptr, i32, ptr) #0
declare i1 @runtime.stringEqual(ptr, i32, ptr, i32, ptr) #1
; Function Attrs: nounwind
define hidden i1 @main.stringCompareUnequal(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr %context) unnamed_addr #1 {
define hidden i1 @main.stringCompareUnequal(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr %context) unnamed_addr #2 {
entry:
%0 = call i1 @runtime.stringEqual(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr undef) #2
%0 = call i1 @runtime.stringEqual(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr undef) #3
%1 = xor i1 %0, true
ret i1 %1
}
; Function Attrs: nounwind
define hidden i1 @main.stringCompareLarger(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr %context) unnamed_addr #1 {
define hidden i1 @main.stringCompareLarger(ptr %s1.data, i32 %s1.len, ptr %s2.data, i32 %s2.len, ptr %context) unnamed_addr #2 {
entry:
%0 = call i1 @runtime.stringLess(ptr %s2.data, i32 %s2.len, ptr %s1.data, i32 %s1.len, ptr undef) #2
%0 = call i1 @runtime.stringLess(ptr %s2.data, i32 %s2.len, ptr %s1.data, i32 %s1.len, ptr undef) #3
ret i1 %0
}
declare i1 @runtime.stringLess(ptr, i32, ptr, i32, ptr) #0
declare i1 @runtime.stringLess(ptr, i32, ptr, i32, ptr) #1
; Function Attrs: nounwind
define hidden i8 @main.stringLookup(ptr %s.data, i32 %s.len, i8 %x, ptr %context) unnamed_addr #1 {
define hidden i8 @main.stringLookup(ptr %s.data, i32 %s.len, i8 %x, ptr %context) unnamed_addr #2 {
entry:
%0 = zext i8 %x to i32
%.not = icmp ult i32 %0, %s.len
@@ -92,10 +93,11 @@ lookup.next: ; preds = %entry
ret i8 %2
lookup.throw: ; preds = %entry
call void @runtime.lookupPanic(ptr undef) #2
call void @runtime.lookupPanic(ptr undef) #3
unreachable
}
attributes #0 = { "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" }
attributes #1 = { nounwind "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" }
attributes #2 = { nounwind }
attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" }
attributes #1 = { "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" }
attributes #2 = { nounwind "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" }
attributes #3 = { nounwind }