dd07e354b4
The previous implementation assumed that nothing had clobbered the LR register since the current function had started executing, so it would be incorrect for a non-leaf function, for example, that contains the `get_return_address` operation right after a call. The operation is valid only if the `preserve_frame_pointers` flag is enabled, which implies that the presence of a frame record on the stack is guaranteed. Copyright (c) 2022, Arm Limited.
43 lines
644 B
Plaintext
43 lines
644 B
Plaintext
test compile precise-output
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set preserve_frame_pointers=true
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target aarch64
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function %fp() -> i64 {
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block0:
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v0 = get_frame_pointer.i64
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return v0
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}
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; stp fp, lr, [sp, #-16]!
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; mov fp, sp
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; block0:
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; mov x0, fp
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; ldp fp, lr, [sp], #16
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; ret
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function %sp() -> i64 {
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block0:
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v0 = get_stack_pointer.i64
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return v0
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}
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; stp fp, lr, [sp, #-16]!
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; mov fp, sp
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; block0:
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; mov x0, sp
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; ldp fp, lr, [sp], #16
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; ret
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function %return_address() -> i64 {
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block0:
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v0 = get_return_address.i64
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return v0
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}
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; stp fp, lr, [sp, #-16]!
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; mov fp, sp
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; block0:
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; ldr x0, [fp, #8]
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; ldp fp, lr, [sp], #16
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; ret
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