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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/go1.17.ll
Vendored
+26 -15
View File
@@ -5,31 +5,35 @@ 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 i8* @main.Add32(i8* %p, i32 %len, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden i8* @main.Add32(i8* %p, i32 %len, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%0 = getelementptr i8, i8* %p, i32 %len
ret i8* %0
}
define hidden i8* @main.Add64(i8* %p, i64 %len, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden i8* @main.Add64(i8* %p, i64 %len, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%0 = trunc i64 %len to i32
%1 = getelementptr i8, i8* %p, i32 %0
ret i8* %1
}
define hidden [4 x i32]* @main.SliceToArray(i32* %s.data, i32 %s.len, i32 %s.cap, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden [4 x i32]* @main.SliceToArray(i32* %s.data, i32 %s.len, i32 %s.cap, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%0 = icmp ult i32 %s.len, 4
br i1 %0, label %slicetoarray.throw, label %slicetoarray.next
slicetoarray.throw: ; preds = %entry
call void @runtime.sliceToArrayPointerPanic(i8* undef, i8* null)
call void @runtime.sliceToArrayPointerPanic(i8* undef, i8* null) #0
unreachable
slicetoarray.next: ; preds = %entry
@@ -39,9 +43,10 @@ slicetoarray.next: ; preds = %entry
declare void @runtime.sliceToArrayPointerPanic(i8*, i8*)
define hidden [4 x i32]* @main.SliceToArrayConst(i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden [4 x i32]* @main.SliceToArrayConst(i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%makeslice = call i8* @runtime.alloc(i32 24, i8* undef, i8* null)
%makeslice = call i8* @runtime.alloc(i32 24, i8* undef, i8* null) #0
br i1 false, label %slicetoarray.throw, label %slicetoarray.next
slicetoarray.throw: ; preds = %entry
@@ -52,7 +57,8 @@ slicetoarray.next: ; preds = %entry
ret [4 x i32]* %0
}
define hidden { i32*, i32, i32 } @main.SliceInt(i32* dereferenceable_or_null(4) %ptr, i32 %len, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden { i32*, i32, i32 } @main.SliceInt(i32* dereferenceable_or_null(4) %ptr, i32 %len, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%0 = icmp ugt i32 %len, 1073741823
%1 = icmp eq i32* %ptr, null
@@ -62,7 +68,7 @@ entry:
br i1 %4, label %unsafe.Slice.throw, label %unsafe.Slice.next
unsafe.Slice.throw: ; preds = %entry
call void @runtime.unsafeSlicePanic(i8* undef, i8* null)
call void @runtime.unsafeSlicePanic(i8* undef, i8* null) #0
unreachable
unsafe.Slice.next: ; preds = %entry
@@ -74,7 +80,8 @@ unsafe.Slice.next: ; preds = %entry
declare void @runtime.unsafeSlicePanic(i8*, i8*)
define hidden { i8*, i32, i32 } @main.SliceUint16(i8* dereferenceable_or_null(1) %ptr, i16 %len, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden { i8*, i32, i32 } @main.SliceUint16(i8* dereferenceable_or_null(1) %ptr, i16 %len, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%0 = icmp eq i8* %ptr, null
%1 = icmp ne i16 %len, 0
@@ -82,7 +89,7 @@ entry:
br i1 %2, label %unsafe.Slice.throw, label %unsafe.Slice.next
unsafe.Slice.throw: ; preds = %entry
call void @runtime.unsafeSlicePanic(i8* undef, i8* null)
call void @runtime.unsafeSlicePanic(i8* undef, i8* null) #0
unreachable
unsafe.Slice.next: ; preds = %entry
@@ -93,7 +100,8 @@ unsafe.Slice.next: ; preds = %entry
ret { i8*, i32, i32 } %6
}
define hidden { i32*, i32, i32 } @main.SliceUint64(i32* dereferenceable_or_null(4) %ptr, i64 %len, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden { i32*, i32, i32 } @main.SliceUint64(i32* dereferenceable_or_null(4) %ptr, i64 %len, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%0 = icmp ugt i64 %len, 1073741823
%1 = icmp eq i32* %ptr, null
@@ -103,7 +111,7 @@ entry:
br i1 %4, label %unsafe.Slice.throw, label %unsafe.Slice.next
unsafe.Slice.throw: ; preds = %entry
call void @runtime.unsafeSlicePanic(i8* undef, i8* null)
call void @runtime.unsafeSlicePanic(i8* undef, i8* null) #0
unreachable
unsafe.Slice.next: ; preds = %entry
@@ -114,7 +122,8 @@ unsafe.Slice.next: ; preds = %entry
ret { i32*, i32, i32 } %8
}
define hidden { i32*, i32, i32 } @main.SliceInt64(i32* dereferenceable_or_null(4) %ptr, i64 %len, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden { i32*, i32, i32 } @main.SliceInt64(i32* dereferenceable_or_null(4) %ptr, i64 %len, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%0 = icmp ugt i64 %len, 1073741823
%1 = icmp eq i32* %ptr, null
@@ -124,7 +133,7 @@ entry:
br i1 %4, label %unsafe.Slice.throw, label %unsafe.Slice.next
unsafe.Slice.throw: ; preds = %entry
call void @runtime.unsafeSlicePanic(i8* undef, i8* null)
call void @runtime.unsafeSlicePanic(i8* undef, i8* null) #0
unreachable
unsafe.Slice.next: ; preds = %entry
@@ -134,3 +143,5 @@ unsafe.Slice.next: ; preds = %entry
%8 = insertvalue { i32*, i32, i32 } %7, i32 %5, 2
ret { i32*, i32, i32 } %8
}
attributes #0 = { nounwind }