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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/intrinsics-wasm.ll
Vendored
+10 -6
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@@ -5,27 +5,31 @@ 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 double @main.mySqrt(double %x, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden double @main.mySqrt(double %x, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%0 = call double @llvm.sqrt.f64(double %x)
ret double %0
}
; Function Attrs: nounwind readnone speculatable willreturn
declare double @llvm.sqrt.f64(double) #0
declare double @llvm.sqrt.f64(double) #1
define hidden double @main.myTrunc(double %x, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden double @main.myTrunc(double %x, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%0 = call double @llvm.trunc.f64(double %x)
ret double %0
}
; Function Attrs: nounwind readnone speculatable willreturn
declare double @llvm.trunc.f64(double) #0
declare double @llvm.trunc.f64(double) #1
attributes #0 = { nounwind readnone speculatable willreturn }
attributes #0 = { nounwind }
attributes #1 = { nounwind readnone speculatable willreturn }