test/CodeGen/X86/mcu-abi.ll

; RUN: llc < %s -mtriple=i686-pc-elfiamcu | FileCheck %s

%struct.st12_t = type { i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32, i32 }

; CHECK-LABEL: test_ints:
; CHECK: addl    %edx, %eax
; CHECK-NEXT: imull   %ecx, %eax
; CHECK-NEXT: addl    4(%esp), %eax
; CHECK-NEXT: retl
define i32 @test_ints(i32 %a, i32 %b, i32 %c, i32 %d) #0 {
entry:
  %r1 = add i32 %b, %a
  %r2 = mul i32 %c, %r1
  %r3 = add i32 %d, %r2
  ret i32 %r3
}

; CHECK-LABEL: test_floats:
; CHECK: addl    %edx, %eax
; CHECK-NEXT: imull   %ecx, %eax
; CHECK-NEXT: addl    4(%esp), %eax
; CHECK-NEXT: retl
define i32 @test_floats(i32 %a, i32 %b, float %c, float %d) #0 {
entry:
  %ci = bitcast float %c to i32
  %di = bitcast float %d to i32
  %r1 = add i32 %b, %a
  %r2 = mul i32 %ci, %r1
  %r3 = add i32 %di, %r2
  ret i32 %r3
}

; CHECK-LABEL: test_doubles:
; CHECK: addl    4(%esp), %eax
; CHECK-NEXT: adcl    8(%esp), %edx
; CHECK-NEXT: retl
define double @test_doubles(double %d1, double %d2) #0 {
entry:
    %d1i = bitcast double %d1 to i64
    %d2i = bitcast double %d2 to i64
    %r = add i64 %d1i, %d2i
    %rd = bitcast i64 %r to double
    ret double %rd
}

; CHECK-LABEL: test_mixed_doubles:
; CHECK: addl    %ecx, %eax
; CHECK-NEXT: adcl    $0, %edx
; CHECK-NEXT: retl
define double @test_mixed_doubles(double %d2, i32 %i) #0 {
entry:
    %iext = zext i32 %i to i64
    %d2i = bitcast double %d2 to i64
    %r = add i64 %iext, %d2i
    %rd = bitcast i64 %r to double
    ret double %rd
}

; CHECK-LABEL: ret_large_struct:
; CHECK: pushl   %esi
; CHECK-NEXT: movl    %eax, %esi
; CHECK-NEXT: leal    8(%esp), %edx
; CHECK-NEXT: movl    $48, %ecx
; CHECK-NEXT: calll   memcpy
; CHECK-NEXT: movl    %esi, %eax
; CHECK-NEXT: popl    %esi
; CHECK-NOT:  retl $4
; CHECK-NEXT: retl
define void @ret_large_struct(%struct.st12_t* noalias nocapture sret %agg.result, %struct.st12_t* byval nocapture readonly align 4 %r) #0 {
entry:
  %0 = bitcast %struct.st12_t* %agg.result to i8*
  %1 = bitcast %struct.st12_t* %r to i8*
  call void @llvm.memcpy.p0i8.p0i8.i32(i8* %0, i8* %1, i32 48, i32 1, i1 false)
  ret void
}

; CHECK-LABEL: var_args:
; CHECK: movl    4(%esp), %eax
; CHECK-NEXT: retl
define i32 @var_args(i32 %i1, ...) #0 {
entry:
  ret i32 %i1
}

; CHECK-LABEL: test_lib_args:
; CHECK: movl %edx, %eax
; CHECK: calll __fixsfsi
define i32 @test_lib_args(float %a, float %b) #0 {
  %ret = fptosi float %b to i32
  ret i32 %ret
}

; CHECK-LABEL: test_fp128:
; CHECK: movl    (%eax), %e[[CX:..]]
; CHECK-NEXT: movl    4(%eax), %e[[DX:..]]
; CHECK-NEXT: movl    8(%eax), %e[[SI:..]]
; CHECK-NEXT: movl    12(%eax), %e[[AX:..]]
; CHECK-NEXT: movl    %e[[AX]], 12(%esp)
; CHECK-NEXT: movl    %e[[SI]], 8(%esp)
; CHECK-NEXT: movl    %e[[DX]], 4(%esp)
; CHECK-NEXT: movl    %e[[CX]], (%esp)
; CHECK-NEXT: calll   __fixtfsi
define i32 @test_fp128(fp128* %ptr) #0 {
  %v = load fp128, fp128* %ptr
  %ret = fptosi fp128 %v to i32
  ret i32 %ret
}

declare void @llvm.memcpy.p0i8.p0i8.i32(i8* nocapture, i8* nocapture readonly, i32, i32, i1) #1

attributes #0 = { nounwind "use-soft-float"="true"}
attributes #1 = { nounwind argmemonly }