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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/slice.ll
Vendored
+37 -24
View File
@@ -5,28 +5,32 @@ 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 i32 @main.sliceLen(i32* %ints.data, i32 %ints.len, i32 %ints.cap, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden i32 @main.sliceLen(i32* %ints.data, i32 %ints.len, i32 %ints.cap, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
ret i32 %ints.len
}
define hidden i32 @main.sliceCap(i32* %ints.data, i32 %ints.len, i32 %ints.cap, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden i32 @main.sliceCap(i32* %ints.data, i32 %ints.len, i32 %ints.cap, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
ret i32 %ints.cap
}
define hidden i32 @main.sliceElement(i32* %ints.data, i32 %ints.len, i32 %ints.cap, i32 %index, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden i32 @main.sliceElement(i32* %ints.data, i32 %ints.len, i32 %ints.cap, i32 %index, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%.not = icmp ult i32 %index, %ints.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
@@ -37,9 +41,10 @@ lookup.next: ; preds = %entry
declare void @runtime.lookupPanic(i8*, i8*)
define hidden { i32*, i32, i32 } @main.sliceAppendValues(i32* %ints.data, i32 %ints.len, i32 %ints.cap, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden { i32*, i32, i32 } @main.sliceAppendValues(i32* %ints.data, i32 %ints.len, i32 %ints.cap, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%varargs = call i8* @runtime.alloc(i32 12, i8* undef, i8* null)
%varargs = call i8* @runtime.alloc(i32 12, i8* undef, i8* null) #0
%0 = bitcast i8* %varargs to i32*
store i32 1, i32* %0, align 4
%1 = getelementptr inbounds i8, i8* %varargs, i32 4
@@ -49,7 +54,7 @@ entry:
%4 = bitcast i8* %3 to i32*
store i32 3, i32* %4, align 4
%append.srcPtr = bitcast i32* %ints.data to i8*
%append.new = call { i8*, i32, i32 } @runtime.sliceAppend(i8* %append.srcPtr, i8* nonnull %varargs, i32 %ints.len, i32 %ints.cap, i32 3, i32 4, i8* undef, i8* null)
%append.new = call { i8*, i32, i32 } @runtime.sliceAppend(i8* %append.srcPtr, i8* nonnull %varargs, i32 %ints.len, i32 %ints.cap, i32 3, i32 4, i8* undef, i8* null) #0
%append.newPtr = extractvalue { i8*, i32, i32 } %append.new, 0
%append.newBuf = bitcast i8* %append.newPtr to i32*
%append.newLen = extractvalue { i8*, i32, i32 } %append.new, 1
@@ -62,11 +67,12 @@ entry:
declare { i8*, i32, i32 } @runtime.sliceAppend(i8*, i8* nocapture readonly, i32, i32, i32, i32, i8*, i8*)
define hidden { i32*, i32, i32 } @main.sliceAppendSlice(i32* %ints.data, i32 %ints.len, i32 %ints.cap, i32* %added.data, i32 %added.len, i32 %added.cap, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden { i32*, i32, i32 } @main.sliceAppendSlice(i32* %ints.data, i32 %ints.len, i32 %ints.cap, i32* %added.data, i32 %added.len, i32 %added.cap, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%append.srcPtr = bitcast i32* %ints.data to i8*
%append.srcPtr1 = bitcast i32* %added.data to i8*
%append.new = call { i8*, i32, i32 } @runtime.sliceAppend(i8* %append.srcPtr, i8* %append.srcPtr1, i32 %ints.len, i32 %ints.cap, i32 %added.len, i32 4, i8* undef, i8* null)
%append.new = call { i8*, i32, i32 } @runtime.sliceAppend(i8* %append.srcPtr, i8* %append.srcPtr1, i32 %ints.len, i32 %ints.cap, i32 %added.len, i32 4, i8* undef, i8* null) #0
%append.newPtr = extractvalue { i8*, i32, i32 } %append.new, 0
%append.newBuf = bitcast i8* %append.newPtr to i32*
%append.newLen = extractvalue { i8*, i32, i32 } %append.new, 1
@@ -77,27 +83,29 @@ entry:
ret { i32*, i32, i32 } %2
}
define hidden i32 @main.sliceCopy(i32* %dst.data, i32 %dst.len, i32 %dst.cap, i32* %src.data, i32 %src.len, i32 %src.cap, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden i32 @main.sliceCopy(i32* %dst.data, i32 %dst.len, i32 %dst.cap, i32* %src.data, i32 %src.len, i32 %src.cap, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%copy.dstPtr = bitcast i32* %dst.data to i8*
%copy.srcPtr = bitcast i32* %src.data to i8*
%copy.n = call i32 @runtime.sliceCopy(i8* %copy.dstPtr, i8* %copy.srcPtr, i32 %dst.len, i32 %src.len, i32 4, i8* undef, i8* null)
%copy.n = call i32 @runtime.sliceCopy(i8* %copy.dstPtr, i8* %copy.srcPtr, i32 %dst.len, i32 %src.len, i32 4, i8* undef, i8* null) #0
ret i32 %copy.n
}
declare i32 @runtime.sliceCopy(i8* nocapture writeonly, i8* nocapture readonly, i32, i32, i32, i8*, i8*)
define hidden { i8*, i32, i32 } @main.makeByteSlice(i32 %len, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden { i8*, i32, i32 } @main.makeByteSlice(i32 %len, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%slice.maxcap = icmp slt i32 %len, 0
br i1 %slice.maxcap, label %slice.throw, label %slice.next
slice.throw: ; preds = %entry
call void @runtime.slicePanic(i8* undef, i8* null)
call void @runtime.slicePanic(i8* undef, i8* null) #0
unreachable
slice.next: ; preds = %entry
%makeslice.buf = call i8* @runtime.alloc(i32 %len, i8* undef, i8* null)
%makeslice.buf = call i8* @runtime.alloc(i32 %len, i8* undef, i8* null) #0
%0 = insertvalue { i8*, i32, i32 } undef, i8* %makeslice.buf, 0
%1 = insertvalue { i8*, i32, i32 } %0, i32 %len, 1
%2 = insertvalue { i8*, i32, i32 } %1, i32 %len, 2
@@ -106,18 +114,19 @@ slice.next: ; preds = %entry
declare void @runtime.slicePanic(i8*, i8*)
define hidden { i16*, i32, i32 } @main.makeInt16Slice(i32 %len, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden { i16*, i32, i32 } @main.makeInt16Slice(i32 %len, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%slice.maxcap = icmp slt i32 %len, 0
br i1 %slice.maxcap, label %slice.throw, label %slice.next
slice.throw: ; preds = %entry
call void @runtime.slicePanic(i8* undef, i8* null)
call void @runtime.slicePanic(i8* undef, i8* null) #0
unreachable
slice.next: ; preds = %entry
%makeslice.cap = shl i32 %len, 1
%makeslice.buf = call i8* @runtime.alloc(i32 %makeslice.cap, i8* undef, i8* null)
%makeslice.buf = call i8* @runtime.alloc(i32 %makeslice.cap, i8* undef, i8* null) #0
%makeslice.array = bitcast i8* %makeslice.buf to i16*
%0 = insertvalue { i16*, i32, i32 } undef, i16* %makeslice.array, 0
%1 = insertvalue { i16*, i32, i32 } %0, i32 %len, 1
@@ -125,18 +134,19 @@ slice.next: ; preds = %entry
ret { i16*, i32, i32 } %2
}
define hidden { [3 x i8]*, i32, i32 } @main.makeArraySlice(i32 %len, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden { [3 x i8]*, i32, i32 } @main.makeArraySlice(i32 %len, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%slice.maxcap = icmp ugt i32 %len, 1431655765
br i1 %slice.maxcap, label %slice.throw, label %slice.next
slice.throw: ; preds = %entry
call void @runtime.slicePanic(i8* undef, i8* null)
call void @runtime.slicePanic(i8* undef, i8* null) #0
unreachable
slice.next: ; preds = %entry
%makeslice.cap = mul i32 %len, 3
%makeslice.buf = call i8* @runtime.alloc(i32 %makeslice.cap, i8* undef, i8* null)
%makeslice.buf = call i8* @runtime.alloc(i32 %makeslice.cap, i8* undef, i8* null) #0
%makeslice.array = bitcast i8* %makeslice.buf to [3 x i8]*
%0 = insertvalue { [3 x i8]*, i32, i32 } undef, [3 x i8]* %makeslice.array, 0
%1 = insertvalue { [3 x i8]*, i32, i32 } %0, i32 %len, 1
@@ -144,21 +154,24 @@ slice.next: ; preds = %entry
ret { [3 x i8]*, i32, i32 } %2
}
define hidden { i32*, i32, i32 } @main.makeInt32Slice(i32 %len, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden { i32*, i32, i32 } @main.makeInt32Slice(i32 %len, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%slice.maxcap = icmp ugt i32 %len, 1073741823
br i1 %slice.maxcap, label %slice.throw, label %slice.next
slice.throw: ; preds = %entry
call void @runtime.slicePanic(i8* undef, i8* null)
call void @runtime.slicePanic(i8* undef, i8* null) #0
unreachable
slice.next: ; preds = %entry
%makeslice.cap = shl i32 %len, 2
%makeslice.buf = call i8* @runtime.alloc(i32 %makeslice.cap, i8* undef, i8* null)
%makeslice.buf = call i8* @runtime.alloc(i32 %makeslice.cap, i8* undef, i8* null) #0
%makeslice.array = bitcast i8* %makeslice.buf to i32*
%0 = insertvalue { i32*, i32, i32 } undef, i32* %makeslice.array, 0
%1 = insertvalue { i32*, i32, i32 } %0, i32 %len, 1
%2 = insertvalue { i32*, i32, i32 } %1, i32 %len, 2
ret { i32*, i32, i32 } %2
}
attributes #0 = { nounwind }