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target datalayout = "e-m:e-p:32:32-i64:64-v128:64:128-a:0:32-n32-S64"
target triple = "armv7m-none-eabi"
@runtime.zeroSizedAlloc = internal global i8 0, align 1
declare nonnull i8* @runtime.alloc(i32)
define void @testInt() {
%stackalloc.alloca = alloca [1 x i32]
store [1 x i32] zeroinitializer, [1 x i32]* %stackalloc.alloca
%stackalloc = bitcast [1 x i32]* %stackalloc.alloca to i32*
store i32 5, i32* %stackalloc
ret void
}
define i16 @testArray() {
%stackalloc.alloca = alloca [2 x i32]
store [2 x i32] zeroinitializer, [2 x i32]* %stackalloc.alloca
%stackalloc = bitcast [2 x i32]* %stackalloc.alloca to i16*
%1 = getelementptr i16, i16* %stackalloc, i32 1
store i16 5, i16* %1
%2 = getelementptr i16, i16* %stackalloc, i32 2
%3 = load i16, i16* %2
ret i16 %3
}
define void @testEscapingCall() {
%1 = call i8* @runtime.alloc(i32 4)
%2 = bitcast i8* %1 to i32*
%3 = call i32* @escapeIntPtr(i32* %2)
ret void
}
define void @testEscapingCall2() {
%1 = call i8* @runtime.alloc(i32 4)
%2 = bitcast i8* %1 to i32*
%3 = call i32* @escapeIntPtrSometimes(i32* %2, i32* %2)
ret void
}
define void @testNonEscapingCall() {
%stackalloc.alloca = alloca [1 x i32]
store [1 x i32] zeroinitializer, [1 x i32]* %stackalloc.alloca
%stackalloc = bitcast [1 x i32]* %stackalloc.alloca to i32*
%1 = call i32* @noescapeIntPtr(i32* %stackalloc)
ret void
}
define i32* @testEscapingReturn() {
%1 = call i8* @runtime.alloc(i32 4)
%2 = bitcast i8* %1 to i32*
ret i32* %2
}
define void @testNonEscapingLoop() {
entry:
%stackalloc.alloca = alloca [1 x i32]
br label %loop
loop: ; preds = %loop, %entry
store [1 x i32] zeroinitializer, [1 x i32]* %stackalloc.alloca
%stackalloc = bitcast [1 x i32]* %stackalloc.alloca to i32*
%0 = call i32* @noescapeIntPtr(i32* %stackalloc)
%1 = icmp eq i32* null, %0
br i1 %1, label %loop, label %end
end: ; preds = %loop
ret void
}
define void @testZeroSizedAlloc() {
%1 = bitcast i8* @runtime.zeroSizedAlloc to i32*
%2 = call i32* @noescapeIntPtr(i32* %1)
ret void
}
declare i32* @escapeIntPtr(i32*)
declare i32* @noescapeIntPtr(i32* nocapture)
declare i32* @escapeIntPtrSometimes(i32* nocapture, i32*)
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