73 строки
2,1 КиБ
LLVM
73 строки
2,1 КиБ
LLVM
target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
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target triple = "armv7m-none-eabi"
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@runtime.zeroSizedAlloc = internal global i8 0, align 1
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declare nonnull ptr @runtime.alloc(i32, ptr)
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define void @testInt() {
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%stackalloc.alloca = alloca [4 x i8], align 4
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store [4 x i8] zeroinitializer, ptr %stackalloc.alloca, align 4
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store i32 5, ptr %stackalloc.alloca, align 4
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ret void
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}
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define i16 @testArray() {
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%stackalloc.alloca = alloca [6 x i8], align 2
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store [6 x i8] zeroinitializer, ptr %stackalloc.alloca, align 2
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%alloc.1 = getelementptr i16, ptr %stackalloc.alloca, i32 1
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store i16 5, ptr %alloc.1, align 2
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%alloc.2 = getelementptr i16, ptr %stackalloc.alloca, i32 2
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%val = load i16, ptr %alloc.2, align 2
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ret i16 %val
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}
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define void @testEscapingCall() {
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%alloc = call ptr @runtime.alloc(i32 4, ptr null)
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%val = call ptr @escapeIntPtr(ptr %alloc)
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ret void
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}
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define void @testEscapingCall2() {
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%alloc = call ptr @runtime.alloc(i32 4, ptr null)
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%val = call ptr @escapeIntPtrSometimes(ptr %alloc, ptr %alloc)
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ret void
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}
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define void @testNonEscapingCall() {
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%stackalloc.alloca = alloca [4 x i8], align 4
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store [4 x i8] zeroinitializer, ptr %stackalloc.alloca, align 4
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%val = call ptr @noescapeIntPtr(ptr %stackalloc.alloca)
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ret void
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}
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define ptr @testEscapingReturn() {
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%alloc = call ptr @runtime.alloc(i32 4, ptr null)
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ret ptr %alloc
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}
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define void @testNonEscapingLoop() {
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entry:
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%stackalloc.alloca = alloca [4 x i8], align 4
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br label %loop
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loop: ; preds = %loop, %entry
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store [4 x i8] zeroinitializer, ptr %stackalloc.alloca, align 4
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%ptr = call ptr @noescapeIntPtr(ptr %stackalloc.alloca)
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%result = icmp eq ptr null, %ptr
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br i1 %result, label %loop, label %end
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end: ; preds = %loop
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ret void
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}
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define void @testZeroSizedAlloc() {
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%ptr = call ptr @noescapeIntPtr(ptr @runtime.zeroSizedAlloc)
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ret void
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}
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declare ptr @escapeIntPtr(ptr)
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declare ptr @noescapeIntPtr(ptr nocapture)
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declare ptr @escapeIntPtrSometimes(ptr nocapture, ptr)
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