2019-04-02 17:46:52 +08:00
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# RUN: llc -mtriple=aarch64-none-linux-gnu -start-before=greedy -stop-after=prologepilog %s -o - | FileCheck %s
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...
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# Ensure that an object with a different stack-id is not allocated to a
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# callee-save slot using stack-slot scavenging. This test saves X28 which
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# creates a hole in the CSR stack region, but it should not be saved to.
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# Instead of saving to SP + 1 (which would be the hole in the region), it
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# should save to SP + 2 (since AArch64 codegen currently does not support
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# (and thus allocate) objects with a stack-id > 0).
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name: test_no_stackslot_scavenging
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# CHECK: name: test_no_stackslot_scavenging
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# CHECK: STRXui $x0, $sp, 2
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tracksRegLiveness: true
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frameInfo:
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maxAlignment: 16
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stack:
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2019-06-17 17:13:29 +08:00
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- { id: 0, stack-id: noalloc, size: 8, alignment: 8 }
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2019-04-02 17:46:52 +08:00
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body: |
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bb.0.entry:
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liveins: $x0
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STRXui $x0, %stack.0, 0
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; Force preserve a CSR to create a hole in the CSR stack region.
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$x28 = IMPLICIT_DEF
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RET_ReallyLR
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---
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