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26a5894f0f
This change adds a support for a preserve_most calling convention to the AArch64 backend, similar to how it was done for X86-64. There is also a subsequent patch on top of this one to add a tail-calls support for this calling convention. Differential Revision: http://reviews.llvm.org/D18016 llvm-svn: 263092
41 lines
1.2 KiB
LLVM
41 lines
1.2 KiB
LLVM
; RUN: llc < %s -mtriple=arm64-apple-ios-8.0.0 | FileCheck %s
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declare void @standard_cc_func()
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declare preserve_mostcc void @preserve_mostcc_func()
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; Registers r9-r15 should be saved before the call of a function
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; with a standard calling convention.
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define preserve_mostcc void @preserve_mostcc1() nounwind {
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entry:
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;CHECK-LABEL: preserve_mostcc1
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;CHECK-NOT: stp
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;CHECK-NOT: str
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;CHECK: str x15
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;CHECK-NEXT: stp x14, x13,
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;CHECK-NEXT: stp x12, x11,
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;CHECK-NEXT: stp x10, x9,
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;CHECK: bl _standard_cc_func
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call void @standard_cc_func()
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;CHECK: ldp x10, x9,
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;CHECK-NEXT: ldp x12, x11,
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;CHECK-NEXT: ldp x14, x13,
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;CHECK-NEXT: ldr x15
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ret void
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}
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; Registers r9-r15 don't need to be saved if one
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; function with preserve_mostcc calling convention calls another
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; function with preserve_mostcc calling convention, because the
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; callee wil save these registers anyways.
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define preserve_mostcc void @preserve_mostcc2() nounwind {
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entry:
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;CHECK-LABEL: preserve_mostcc2
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;CHECK-NOT: x14
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;CHECK: stp x29, x30,
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;CHECK-NOT: x14
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;CHECK: bl _preserve_mostcc_func
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call preserve_mostcc void @preserve_mostcc_func()
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ret void
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}
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