f180339d6b
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.
98 строки
3,2 КиБ
LLVM
98 строки
3,2 КиБ
LLVM
; ModuleID = 'float.go'
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source_filename = "float.go"
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target datalayout = "e-m:e-p:32:32-p10:8:8-p20:8:8-i64:64-n32:64-S128-ni:1:10:20"
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target triple = "wasm32-unknown-wasi"
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; Function Attrs: allockind("alloc,zeroed") allocsize(0)
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declare noalias nonnull ptr @runtime.alloc(i32, ptr, ptr) #0
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declare void @runtime.trackPointer(ptr nocapture readonly, ptr, ptr) #1
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; Function Attrs: nounwind
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define hidden void @main.init(ptr %context) unnamed_addr #2 {
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entry:
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ret void
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}
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; Function Attrs: nounwind
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define hidden i32 @main.f32tou32(float %v, ptr %context) unnamed_addr #2 {
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entry:
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%positive = fcmp oge float %v, 0.000000e+00
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%withinmax = fcmp ole float %v, 0x41EFFFFFC0000000
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%inbounds = and i1 %positive, %withinmax
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%saturated = sext i1 %positive to i32
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%normal = fptoui float %v to i32
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%0 = select i1 %inbounds, i32 %normal, i32 %saturated
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ret i32 %0
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}
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; Function Attrs: nounwind
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define hidden float @main.maxu32f(ptr %context) unnamed_addr #2 {
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entry:
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ret float 0x41F0000000000000
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}
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; Function Attrs: nounwind
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define hidden i32 @main.maxu32tof32(ptr %context) unnamed_addr #2 {
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entry:
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ret i32 -1
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}
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; Function Attrs: nounwind
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define hidden { i32, i32, i32, i32 } @main.inftoi32(ptr %context) unnamed_addr #2 {
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entry:
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ret { i32, i32, i32, i32 } { i32 -1, i32 0, i32 2147483647, i32 -2147483648 }
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}
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; Function Attrs: nounwind
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define hidden i32 @main.u32tof32tou32(i32 %v, ptr %context) unnamed_addr #2 {
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entry:
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%0 = uitofp i32 %v to float
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%withinmax = fcmp ole float %0, 0x41EFFFFFC0000000
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%normal = fptoui float %0 to i32
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%1 = select i1 %withinmax, i32 %normal, i32 -1
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ret i32 %1
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}
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; Function Attrs: nounwind
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define hidden float @main.f32tou32tof32(float %v, ptr %context) unnamed_addr #2 {
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entry:
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%positive = fcmp oge float %v, 0.000000e+00
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%withinmax = fcmp ole float %v, 0x41EFFFFFC0000000
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%inbounds = and i1 %positive, %withinmax
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%saturated = sext i1 %positive to i32
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%normal = fptoui float %v to i32
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%0 = select i1 %inbounds, i32 %normal, i32 %saturated
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%1 = uitofp i32 %0 to float
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ret float %1
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}
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; Function Attrs: nounwind
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define hidden i8 @main.f32tou8(float %v, ptr %context) unnamed_addr #2 {
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entry:
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%positive = fcmp oge float %v, 0.000000e+00
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%withinmax = fcmp ole float %v, 2.550000e+02
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%inbounds = and i1 %positive, %withinmax
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%saturated = sext i1 %positive to i8
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%normal = fptoui float %v to i8
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%0 = select i1 %inbounds, i8 %normal, i8 %saturated
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ret i8 %0
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}
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; Function Attrs: nounwind
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define hidden i8 @main.f32toi8(float %v, ptr %context) unnamed_addr #2 {
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entry:
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%abovemin = fcmp oge float %v, -1.280000e+02
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%belowmax = fcmp ole float %v, 1.270000e+02
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%inbounds = and i1 %abovemin, %belowmax
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%saturated = select i1 %abovemin, i8 127, i8 -128
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%isnan = fcmp uno float %v, 0.000000e+00
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%remapped = select i1 %isnan, i8 0, i8 %saturated
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%normal = fptosi float %v to i8
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%0 = select i1 %inbounds, i8 %normal, i8 %remapped
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ret i8 %0
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}
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attributes #0 = { allockind("alloc,zeroed") allocsize(0) "alloc-family"="runtime.alloc" "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" }
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attributes #1 = { "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" }
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attributes #2 = { nounwind "target-features"="+bulk-memory,+nontrapping-fptoint,+sign-ext" }
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