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|
# RUN: llc -start-before=aarch64-ldst-opt -o - %s | FileCheck %s
# CHECK-NOT: stp xzr, xzr, [sp], #16
# CHECK: add sp, sp, #16
--- |
target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
target triple = "aarch64"
define hidden i32 @foo(i32 %0) {
%2 = alloca [4 x i32], align 4
%3 = bitcast [4 x i32]* %2 to i8*
call void @llvm.memset.p0i8.i64(i8* nonnull align 4 dereferenceable(16) %3, i8 0, i64 16, i1 false)
%4 = sext i32 %0 to i64
%5 = getelementptr inbounds [4 x i32], [4 x i32]* %2, i64 0, i64 %4
%6 = load i32, i32* %5, align 4
ret i32 %6
}
declare void @llvm.memset.p0i8.i64(i8* nocapture writeonly, i8, i64, i1 immarg) #2
declare void @llvm.stackprotector(i8*, i8**) #3
!llvm.module.flags = !{!0}
!llvm.ident = !{!1}
!0 = !{i32 1, !"wchar_size", i32 4}
!1 = !{!"clang version 11.0.0 "}
!2 = !{!3, !3, i64 0}
!3 = !{!"int", !4, i64 0}
!4 = !{!"omnipotent char", !5, i64 0}
!5 = !{!"Simple C++ TBAA"}
...
---
name: foo
alignment: 8
exposesReturnsTwice: false
legalized: false
regBankSelected: false
selected: false
failedISel: false
tracksRegLiveness: true
hasWinCFI: false
registers: []
liveins:
- { reg: '$w0', virtual-reg: '' }
frameInfo:
isFrameAddressTaken: false
isReturnAddressTaken: false
hasStackMap: false
hasPatchPoint: false
stackSize: 16
offsetAdjustment: 0
maxAlignment: 8
adjustsStack: false
hasCalls: false
stackProtector: ''
maxCallFrameSize: 0
cvBytesOfCalleeSavedRegisters: 0
hasOpaqueSPAdjustment: false
hasVAStart: false
hasMustTailInVarArgFunc: false
localFrameSize: 16
savePoint: ''
restorePoint: ''
fixedStack: []
stack:
- { id: 0, type: default, offset: -16, size: 16,
alignment: 8, stack-id: default, callee-saved-register: '', callee-saved-restored: true,
local-offset: -16, debug-info-variable: '', debug-info-expression: '',
debug-info-location: '' }
callSites: []
constants: []
machineFunctionInfo: {}
body: |
bb.0 (%ir-block.1):
liveins: $w0
$sp = frame-setup SUBXri $sp, 16, 0
$x8 = ADDXri $sp, 0, 0
STRXui $xzr, $sp, 1 :: (store (s64) into %ir.3 + 8)
STRXui $xzr, $sp, 0 :: (store (s64) into %ir.3)
renamable $w0 = LDRWroW killed renamable $x8, killed renamable $w0, 1, 1 :: (load (s32) from %ir.5, !tbaa !2)
$sp = frame-destroy ADDXri $sp, 16, 0
RET undef $lr, implicit $w0
...
|
