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https://github.com/c64scene-ar/llvm-6502.git
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75046b4891
Summary:
According to the ABI documentation, f128 and {f128} should both be returned
in $f0 and $f2. However, this doesn't match GCC's behaviour which is to
return f128 in $f0 and $f2, but {f128} in $f0 and $f1.
Reviewers: vmedic
Reviewed By: vmedic
Subscribers: llvm-commits
Differential Revision: http://reviews.llvm.org/D5578
git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@219196 91177308-0d34-0410-b5e6-96231b3b80d8
37 lines
1.6 KiB
LLVM
37 lines
1.6 KiB
LLVM
; RUN: llc -mtriple=mips64-linux-gnu -relocation-model=static -mattr=-n64,+n32 < %s | FileCheck --check-prefix=ALL --check-prefix=N32 %s
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; RUN: llc -mtriple=mips64el-linux-gnu -relocation-model=static -mattr=-n64,+n32 < %s | FileCheck --check-prefix=ALL --check-prefix=N32 %s
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; RUN: llc -mtriple=mips64-linux-gnu -relocation-model=static -mattr=-n64,+n64 < %s | FileCheck --check-prefix=ALL --check-prefix=N64 %s
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; RUN: llc -mtriple=mips64el-linux-gnu -relocation-model=static -mattr=-n64,+n64 < %s | FileCheck --check-prefix=ALL --check-prefix=N64 %s
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; Test return of {fp128} agrees with de-facto N32/N64 ABI.
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@struct_fp128 = global {fp128} zeroinitializer
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define inreg {fp128} @ret_struct_fp128() nounwind {
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entry:
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%0 = load volatile {fp128}* @struct_fp128
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ret {fp128} %0
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}
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; ALL-LABEL: ret_struct_fp128:
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; O32 generates different IR so we don't test it here. It returns the struct
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; indirectly.
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; Contrary to the N32/N64 ABI documentation, a struct containing a long double
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; is returned in $f0, and $f1 instead of the usual $f0, and $f2. This is to
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; match the de facto ABI as implemented by GCC.
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; N32-DAG: lui [[R1:\$[0-9]+]], %hi(struct_fp128)
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; N32-DAG: ld [[R2:\$[0-9]+]], %lo(struct_fp128)([[R1]])
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; N32-DAG: dmtc1 [[R2]], $f0
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; N32-DAG: addiu [[R3:\$[0-9]+]], [[R1]], %lo(struct_fp128)
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; N32-DAG: ld [[R4:\$[0-9]+]], 8([[R3]])
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; N32-DAG: dmtc1 [[R4]], $f1
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; N64-DAG: ld [[R1:\$[0-9]+]], %got_disp(struct_fp128)($1)
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; N64-DAG: ld [[R2:\$[0-9]+]], 0([[R1]])
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; N64-DAG: dmtc1 [[R2]], $f0
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; N64-DAG: ld [[R4:\$[0-9]+]], 8([[R1]])
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; N64-DAG: dmtc1 [[R4]], $f1
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