f24a93c51d
This layout parameter is currently always nil and ignored, but will eventually contain a pointer to a memory layout. This commit also adds module verification to the transform tests, as I found out that it didn't (and therefore didn't initially catch all bugs).
85 строки
2,2 КиБ
LLVM
85 строки
2,2 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 i8* @runtime.alloc(i32, i8*)
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; Test allocating a single int (i32) that should be allocated on the stack.
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define void @testInt() {
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%1 = call i8* @runtime.alloc(i32 4, i8* null)
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%2 = bitcast i8* %1 to i32*
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store i32 5, i32* %2
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ret void
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}
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; Test allocating an array of 3 i16 values that should be allocated on the
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; stack.
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define i16 @testArray() {
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%1 = call i8* @runtime.alloc(i32 6, i8* null)
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%2 = bitcast i8* %1 to i16*
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%3 = getelementptr i16, i16* %2, i32 1
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store i16 5, i16* %3
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%4 = getelementptr i16, i16* %2, i32 2
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%5 = load i16, i16* %4
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ret i16 %5
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}
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; Call a function that will let the pointer escape, so the heap-to-stack
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; transform shouldn't be applied.
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define void @testEscapingCall() {
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%1 = call i8* @runtime.alloc(i32 4, i8* null)
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%2 = bitcast i8* %1 to i32*
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%3 = call i32* @escapeIntPtr(i32* %2)
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ret void
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}
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define void @testEscapingCall2() {
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%1 = call i8* @runtime.alloc(i32 4, i8* null)
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%2 = bitcast i8* %1 to i32*
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%3 = call i32* @escapeIntPtrSometimes(i32* %2, i32* %2)
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ret void
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}
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; Call a function that doesn't let the pointer escape.
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define void @testNonEscapingCall() {
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%1 = call i8* @runtime.alloc(i32 4, i8* null)
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%2 = bitcast i8* %1 to i32*
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%3 = call i32* @noescapeIntPtr(i32* %2)
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ret void
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}
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; Return the allocated value, which lets it escape.
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define i32* @testEscapingReturn() {
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%1 = call i8* @runtime.alloc(i32 4, i8* null)
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%2 = bitcast i8* %1 to i32*
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ret i32* %2
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}
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; Do a non-escaping allocation in a loop.
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define void @testNonEscapingLoop() {
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entry:
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br label %loop
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loop:
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%0 = call i8* @runtime.alloc(i32 4, i8* null)
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%1 = bitcast i8* %0 to i32*
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%2 = call i32* @noescapeIntPtr(i32* %1)
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%3 = icmp eq i32* null, %2
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br i1 %3, label %loop, label %end
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end:
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ret void
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}
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; Test a zero-sized allocation.
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define void @testZeroSizedAlloc() {
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%1 = call i8* @runtime.alloc(i32 0, i8* null)
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%2 = bitcast i8* %1 to i32*
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%3 = call i32* @noescapeIntPtr(i32* %2)
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ret void
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}
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declare i32* @escapeIntPtr(i32*)
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declare i32* @noescapeIntPtr(i32* nocapture)
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declare i32* @escapeIntPtrSometimes(i32* nocapture, i32*)
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