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For historic reasons, the behavior of .align differs between targets. Fortunately, there are alternatives, .p2align and .balign, which make the interpretation of the parameter explicit, and which behave consistently across targets. This patch teaches MC to use .p2align instead of .align, so that people reading code for multiple architectures don't have to remember which way each platform does its .align directive. Differential Revision: http://reviews.llvm.org/D16549 llvm-svn: 258750
37 lines
1.6 KiB
LLVM
37 lines
1.6 KiB
LLVM
; RUN: llc < %s -mtriple=arm64-apple-ios7.0 | FileCheck %s
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; rdar://13214163 - Make sure we generate a correct lookup table for the TBL
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; instruction when the element size of the vector is not 8 bits. We were
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; getting both the endianness wrong and the element indexing wrong.
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define <8 x i16> @foo(<8 x i16> %a) nounwind readnone {
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; CHECK: .section __TEXT,__literal16,16byte_literals
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; CHECK: .p2align 4
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; CHECK:lCPI0_0:
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; CHECK: .byte 0 ; 0x0
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; CHECK: .byte 1 ; 0x1
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; CHECK: .byte 0 ; 0x0
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; CHECK: .byte 1 ; 0x1
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; CHECK: .byte 0 ; 0x0
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; CHECK: .byte 1 ; 0x1
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; CHECK: .byte 0 ; 0x0
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; CHECK: .byte 1 ; 0x1
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; CHECK: .byte 8 ; 0x8
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; CHECK: .byte 9 ; 0x9
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; CHECK: .byte 8 ; 0x8
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; CHECK: .byte 9 ; 0x9
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; CHECK: .byte 8 ; 0x8
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; CHECK: .byte 9 ; 0x9
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; CHECK: .byte 8 ; 0x8
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; CHECK: .byte 9 ; 0x9
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; CHECK: .section __TEXT,__text,regular,pure_instructions
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; CHECK: .globl _foo
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; CHECK: .p2align 2
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; CHECK:_foo: ; @foo
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; CHECK: adrp [[BASE:x[0-9]+]], lCPI0_0@PAGE
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; CHECK: ldr q[[REG:[0-9]+]], {{\[}}[[BASE]], lCPI0_0@PAGEOFF]
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; CHECK: tbl.16b v0, { v0 }, v[[REG]]
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; CHECK: ret
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%val = shufflevector <8 x i16> %a, <8 x i16> undef, <8 x i32> <i32 0, i32 0, i32 0, i32 0, i32 4, i32 4, i32 4, i32 4>
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ret <8 x i16> %val
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}
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