llvm-project/llvm/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, 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
}

%struct.S = type { i8 }

; 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:      pushl   12(%eax)
; CHECK-NEXT: pushl   8(%eax)
; CHECK-NEXT: pushl   4(%eax)
; CHECK-NEXT: pushl   (%eax)
; 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, i1) #1

; CHECK-LABEL: test_alignment_d:
; CHECK-NOT: andl  {{.+}}, %esp
define void @test_alignment_d() #0 {
entry:
  %d = alloca double
  store double 2.000000e+00, double* %d
  call void @food(double* inreg %d) 
  ret void
}

; CHECK-LABEL: test_alignment_i:
; CHECK-NOT: andl  {{.+}}, %esp
define void @test_alignment_i() #0 {
entry:
  %i = alloca i64
  store i64 2, i64* %i
  call void @fooi(i64* inreg %i) 
  ret void
}


; CHECK-LABEL: test_alignment_s:
; CHECK-NOT: andl  {{.+}}, %esp
define void @test_alignment_s() #0 {
  %s = alloca %struct.S, align 4
  call void @foos(%struct.S* inreg %s) 
  ret void
}


; CHECK-LABEL: test_alignment_fp:
; CHECK-NOT: andl  {{.+}}, %esp
define void @test_alignment_fp() #0 {
entry:
  %f = alloca fp128
  store fp128 0xL00000000000000004000000000000000, fp128* %f
  call void @foofp(fp128* inreg %f)
  ret void
}

declare void @food(double* inreg)
declare void @fooi(i64* inreg)
declare void @foos(%struct.S* inreg)
declare void @foofp(fp128* inreg)

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