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c5a81e8618
This patch adds support for struct return values to the MSP430 target backend. It also reverses the order of argument and return registers in the calling convention to bring it into closer alignment with the published EABI from TI. Patch by Andrew Wygle (awygle). Differential Revision: https://reviews.llvm.org/D29069 git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@296807 91177308-0d34-0410-b5e6-96231b3b80d8
51 lines
1.3 KiB
LLVM
51 lines
1.3 KiB
LLVM
; RUN: llc < %s | FileCheck %s
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target datalayout = "e-p:16:16:16-i8:8:8-i16:16:16-i32:16:32-n8:16"
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target triple = "msp430---elf"
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declare void @llvm.va_start(i8*) nounwind
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declare void @llvm.va_end(i8*) nounwind
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declare void @llvm.va_copy(i8*, i8*) nounwind
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define void @va_start(i16 %a, ...) nounwind {
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entry:
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; CHECK-LABEL: va_start:
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; CHECK: sub.w #2, r1
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%vl = alloca i8*, align 2
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%vl1 = bitcast i8** %vl to i8*
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; CHECK-NEXT: mov.w r1, [[REG:r[0-9]+]]
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; CHECK-NEXT: add.w #6, [[REG]]
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; CHECK-NEXT: mov.w [[REG]], 0(r1)
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call void @llvm.va_start(i8* %vl1)
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call void @llvm.va_end(i8* %vl1)
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ret void
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}
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define i16 @va_arg(i8* %vl) nounwind {
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entry:
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; CHECK-LABEL: va_arg:
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%vl.addr = alloca i8*, align 2
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; CHECK: mov.w r12, 0(r1)
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store i8* %vl, i8** %vl.addr, align 2
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; CHECK: mov.w r12, [[REG:r[0-9]+]]
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; CHECK-NEXT: add.w #2, [[REG]]
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; CHECK-NEXT: mov.w [[REG]], 0(r1)
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%0 = va_arg i8** %vl.addr, i16
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; CHECK-NEXT: mov.w 0(r12), r12
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ret i16 %0
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}
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define void @va_copy(i8* %vl) nounwind {
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entry:
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; CHECK-LABEL: va_copy:
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%vl.addr = alloca i8*, align 2
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%vl2 = alloca i8*, align 2
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; CHECK: mov.w r12, 2(r1)
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store i8* %vl, i8** %vl.addr, align 2
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%0 = bitcast i8** %vl2 to i8*
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%1 = bitcast i8** %vl.addr to i8*
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; CHECK-NEXT: mov.w r12, 0(r1)
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call void @llvm.va_copy(i8* %0, i8* %1)
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ret void
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}
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