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c90bd4a882
Summary: I had difficulty finding tests for the N32 and N64 ABI so I've added a collection of calling convention tests based on the document MIPS ABIs Described (MD00305), the MIPSpro N32 Handbook, and the SYSV ABI. Where the documents/implementations disagree, I've used GCC to resolve the conflict. A few interesting details: * For N32, LLVM uses 64-bit pointers when saving $ra despite pointers being 32-bit. I've yet to find a supporting statement in the ABI documentation but the current behaviour matches GCC. * For O32, the non-variable portion of a varargs argument list is also subject to the rule that floating-point is passed via GPR's (on N32/N64 only the variable portion is subject to this rule). This agrees with GCC's behaviour and the SYSV ABI but contradicts part of the MIPSpro N32 Handbook which talks about O32's behaviour. * The N32 implementation has the wrong callee-saved register list. (I already have a fix for this but will commit it as a follow-up). I've left RUN-TODO lines in for O32 on MIPS64. I don't plan to support this case for now but we should revisit it. Reviewers: matheusalmeida, vmedic Reviewed By: matheusalmeida Differential Revision: http://reviews.llvm.org/D3339 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@206370 91177308-0d34-0410-b5e6-96231b3b80d8
141 lines
4.4 KiB
LLVM
141 lines
4.4 KiB
LLVM
; RUN: llc -march=mips < %s | FileCheck --check-prefix=ALL --check-prefix=O32 %s
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; RUN: llc -march=mipsel < %s | FileCheck --check-prefix=ALL --check-prefix=O32 %s
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; RUN-TODO: llc -march=mips64 -mattr=-n64,+o32 < %s | FileCheck --check-prefix=ALL --check-prefix=O32 %s
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; RUN-TODO: llc -march=mips64el -mattr=-n64,+o32 < %s | FileCheck --check-prefix=ALL --check-prefix=O32 %s
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; RUN: llc -march=mips64 -mattr=-n64,+n32 < %s | FileCheck --check-prefix=ALL --check-prefix=N32 %s
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; RUN: llc -march=mips64el -mattr=-n64,+n32 < %s | FileCheck --check-prefix=ALL --check-prefix=N32 %s
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; RUN: llc -march=mips64 -mattr=-n64,+n64 < %s | FileCheck --check-prefix=ALL --check-prefix=N64 %s
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; RUN: llc -march=mips64el -mattr=-n64,+n64 < %s | FileCheck --check-prefix=ALL --check-prefix=N64 %s
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; Test the memory layout for all ABI's and byte orders as specified by section
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; 4 of MD00305 (MIPS ABIs Described).
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; Bitfields are not covered since they are not available as a type in LLVM IR.
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;
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; The assembly directives deal with endianness so we don't need to account for
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; that.
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; Deliberately request alignments that are too small for the target so we get
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; the minimum alignment instead of the preferred alignment.
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@byte = global i8 1, align 1
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@halfword = global i16 258, align 1
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@word = global i32 16909060, align 1
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@float = global float 1.0, align 1
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@dword = global i64 283686952306183, align 1
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@double = global double 1.0, align 1
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@pointer = global i8* @byte
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; ALL-NOT: .align
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; ALL-LABEL: byte:
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; ALL: .byte 1
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; ALL: .size byte, 1
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; ALL: .align 1
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; ALL-LABEL: halfword:
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; ALL: .2byte 258
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; ALL: .size halfword, 2
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; ALL: .align 2
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; ALL-LABEL: word:
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; ALL: .4byte 16909060
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; ALL: .size word, 4
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; ALL: .align 2
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; ALL-LABEL: float:
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; ALL: .4byte 1065353216
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; ALL: .size float, 4
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; ALL: .align 3
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; ALL-LABEL: dword:
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; ALL: .8byte 283686952306183
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; ALL: .size dword, 8
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; ALL: .align 3
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; ALL-LABEL: double:
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; ALL: .8byte 4607182418800017408
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; ALL: .size double, 8
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; O32: .align 2
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; N32: .align 2
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; N64: .align 3
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; ALL-LABEL: pointer:
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; O32: .4byte byte
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; O32: .size pointer, 4
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; N32: .4byte byte
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; N32: .size pointer, 4
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; N64: .8byte byte
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; N64: .size pointer, 8
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@byte_array = global [2 x i8] [i8 1, i8 2], align 1
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@halfword_array = global [2 x i16] [i16 1, i16 2], align 1
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@word_array = global [2 x i32] [i32 1, i32 2], align 1
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@float_array = global [2 x float] [float 1.0, float 2.0], align 1
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@dword_array = global [2 x i64] [i64 1, i64 2], align 1
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@double_array = global [2 x double] [double 1.0, double 2.0], align 1
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@pointer_array = global [2 x i8*] [i8* @byte, i8* @byte]
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; ALL-NOT: .align
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; ALL-LABEL: byte_array:
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; ALL: .ascii "\001\002"
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; ALL: .size byte_array, 2
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; ALL: .align 1
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; ALL-LABEL: halfword_array:
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; ALL: .2byte 1
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; ALL: .2byte 2
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; ALL: .size halfword_array, 4
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; ALL: .align 2
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; ALL-LABEL: word_array:
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; ALL: .4byte 1
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; ALL: .4byte 2
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; ALL: .size word_array, 8
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; ALL: .align 2
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; ALL-LABEL: float_array:
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; ALL: .4byte 1065353216
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; ALL: .4byte 1073741824
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; ALL: .size float_array, 8
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; ALL: .align 3
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; ALL-LABEL: dword_array:
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; ALL: .8byte 1
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; ALL: .8byte 2
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; ALL: .size dword_array, 16
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; ALL: .align 3
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; ALL-LABEL: double_array:
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; ALL: .8byte 4607182418800017408
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; ALL: .8byte 4611686018427387904
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; ALL: .size double_array, 16
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; O32: .align 2
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; N32: .align 2
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; N64: .align 3
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; ALL-LABEL: pointer_array:
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; O32: .4byte byte
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; O32: .4byte byte
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; O32: .size pointer_array, 8
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; N32: .4byte byte
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; N32: .4byte byte
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; N32: .size pointer_array, 8
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; N64: .8byte byte
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; N64: .8byte byte
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; N64: .size pointer_array, 16
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%mixed = type { i8, double, i16 }
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@mixed = global %mixed { i8 1, double 1.0, i16 515 }, align 1
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; ALL: .align 3
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; ALL-LABEL: mixed:
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; ALL: .byte 1
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; ALL: .space 7
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; ALL: .8byte 4607182418800017408
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; ALL: .2byte 515
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; ALL: .space 6
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; ALL: .size mixed, 24
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; Bitfields are not available in LLVM IR so we can't test them here.
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