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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/float.ll
Vendored
+20 -9
View File
@@ -5,12 +5,14 @@ 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.f32tou32(float %v, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden i32 @main.f32tou32(float %v, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%positive = fcmp oge float %v, 0.000000e+00
%withinmax = fcmp ole float %v, 0x41EFFFFFC0000000
@@ -21,22 +23,26 @@ entry:
ret i32 %0
}
define hidden float @main.maxu32f(i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden float @main.maxu32f(i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
ret float 0x41F0000000000000
}
define hidden i32 @main.maxu32tof32(i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden i32 @main.maxu32tof32(i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
ret i32 -1
}
define hidden { i32, i32, i32, i32 } @main.inftoi32(i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden { i32, i32, i32, i32 } @main.inftoi32(i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
ret { i32, i32, i32, i32 } { i32 -1, i32 0, i32 2147483647, i32 -2147483648 }
}
define hidden i32 @main.u32tof32tou32(i32 %v, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden i32 @main.u32tof32tou32(i32 %v, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%0 = uitofp i32 %v to float
%withinmax = fcmp ole float %0, 0x41EFFFFFC0000000
@@ -45,7 +51,8 @@ entry:
ret i32 %1
}
define hidden float @main.f32tou32tof32(float %v, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden float @main.f32tou32tof32(float %v, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%positive = fcmp oge float %v, 0.000000e+00
%withinmax = fcmp ole float %v, 0x41EFFFFFC0000000
@@ -57,7 +64,8 @@ entry:
ret float %1
}
define hidden i8 @main.f32tou8(float %v, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden i8 @main.f32tou8(float %v, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%positive = fcmp oge float %v, 0.000000e+00
%withinmax = fcmp ole float %v, 2.550000e+02
@@ -68,7 +76,8 @@ entry:
ret i8 %0
}
define hidden i8 @main.f32toi8(float %v, i8* %context, i8* %parentHandle) unnamed_addr {
; Function Attrs: nounwind
define hidden i8 @main.f32toi8(float %v, i8* %context, i8* %parentHandle) unnamed_addr #0 {
entry:
%abovemin = fcmp oge float %v, -1.280000e+02
%belowmax = fcmp ole float %v, 1.270000e+02
@@ -80,3 +89,5 @@ entry:
%0 = select i1 %inbounds, i8 %normal, i8 %remapped
ret i8 %0
}
attributes #0 = { nounwind }