llvm/test/CodeGen/ARM/llvm.modf.ll

; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py UTC_ARGS: --version 2
; RUN: llc -mtriple=thumbv7-gnu-linux < %s | FileCheck -check-prefixes=CHECK %s
; RUN: llc -mtriple=armv6m < %s | FileCheck %s --check-prefix=THUMB

define { half, half } @test_modf_f16(half %a) {
; CHECK-LABEL: test_modf_f16:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    push {r4, lr}
; CHECK-NEXT:    sub sp, #8
; CHECK-NEXT:    bl __gnu_h2f_ieee
; CHECK-NEXT:    add r1, sp, #4
; CHECK-NEXT:    bl modff
; CHECK-NEXT:    bl __gnu_f2h_ieee
; CHECK-NEXT:    mov r4, r0
; CHECK-NEXT:    ldr r0, [sp, #4]
; CHECK-NEXT:    bl __gnu_f2h_ieee
; CHECK-NEXT:    mov r1, r0
; CHECK-NEXT:    mov r0, r4
; CHECK-NEXT:    add sp, #8
; CHECK-NEXT:    pop {r4, pc}
;
; THUMB-LABEL: test_modf_f16:
; THUMB:       @ %bb.0:
; THUMB-NEXT:    push {r4, lr}
; THUMB-NEXT:    sub sp, #8
; THUMB-NEXT:    uxth r0, r0
; THUMB-NEXT:    bl __gnu_h2f_ieee
; THUMB-NEXT:    add r1, sp, #4
; THUMB-NEXT:    bl modff
; THUMB-NEXT:    bl __gnu_f2h_ieee
; THUMB-NEXT:    mov r4, r0
; THUMB-NEXT:    ldr r0, [sp, #4]
; THUMB-NEXT:    bl __gnu_f2h_ieee
; THUMB-NEXT:    mov r1, r0
; THUMB-NEXT:    mov r0, r4
; THUMB-NEXT:    add sp, #8
; THUMB-NEXT:    pop {r4, pc}
  %result = call { half, half } @llvm.modf.f16(half %a)
  ret { half, half } %result
}

define half @test_modf_f16_only_use_fractional_part(half %a) {
; CHECK-LABEL: test_modf_f16_only_use_fractional_part:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    push {r7, lr}
; CHECK-NEXT:    sub sp, #8
; CHECK-NEXT:    bl __gnu_h2f_ieee
; CHECK-NEXT:    add r1, sp, #4
; CHECK-NEXT:    bl modff
; CHECK-NEXT:    bl __gnu_f2h_ieee
; CHECK-NEXT:    add sp, #8
; CHECK-NEXT:    pop {r7, pc}
;
; THUMB-LABEL: test_modf_f16_only_use_fractional_part:
; THUMB:       @ %bb.0:
; THUMB-NEXT:    push {r7, lr}
; THUMB-NEXT:    sub sp, #8
; THUMB-NEXT:    uxth r0, r0
; THUMB-NEXT:    bl __gnu_h2f_ieee
; THUMB-NEXT:    add r1, sp, #4
; THUMB-NEXT:    bl modff
; THUMB-NEXT:    bl __gnu_f2h_ieee
; THUMB-NEXT:    add sp, #8
; THUMB-NEXT:    pop {r7, pc}
  %result = call { half, half } @llvm.modf.f16(half %a)
  %result.0 = extractvalue { half, half } %result, 0
  ret half %result.0
}

define half @test_modf_f16_only_use_integral_part(half %a) {
; CHECK-LABEL: test_modf_f16_only_use_integral_part:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    push {r7, lr}
; CHECK-NEXT:    sub sp, #8
; CHECK-NEXT:    bl __gnu_h2f_ieee
; CHECK-NEXT:    add r1, sp, #4
; CHECK-NEXT:    bl modff
; CHECK-NEXT:    ldr r0, [sp, #4]
; CHECK-NEXT:    bl __gnu_f2h_ieee
; CHECK-NEXT:    add sp, #8
; CHECK-NEXT:    pop {r7, pc}
;
; THUMB-LABEL: test_modf_f16_only_use_integral_part:
; THUMB:       @ %bb.0:
; THUMB-NEXT:    push {r7, lr}
; THUMB-NEXT:    sub sp, #8
; THUMB-NEXT:    uxth r0, r0
; THUMB-NEXT:    bl __gnu_h2f_ieee
; THUMB-NEXT:    add r1, sp, #4
; THUMB-NEXT:    bl modff
; THUMB-NEXT:    ldr r0, [sp, #4]
; THUMB-NEXT:    bl __gnu_f2h_ieee
; THUMB-NEXT:    add sp, #8
; THUMB-NEXT:    pop {r7, pc}
  %result = call { half, half } @llvm.modf.f16(half %a)
  %result.1 = extractvalue { half, half } %result, 1
  ret half %result.1
}

define { <2 x half>, <2 x half> } @test_modf_v2f16(<2 x half> %a) {
; CHECK-LABEL: test_modf_v2f16:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    push {r4, lr}
; CHECK-NEXT:    vpush {d8}
; CHECK-NEXT:    sub sp, #16
; CHECK-NEXT:    mov r4, r0
; CHECK-NEXT:    mov r0, r1
; CHECK-NEXT:    bl __gnu_h2f_ieee
; CHECK-NEXT:    add r1, sp, #4
; CHECK-NEXT:    bl modff
; CHECK-NEXT:    bl __gnu_f2h_ieee
; CHECK-NEXT:    strh.w r0, [sp, #14]
; CHECK-NEXT:    mov r0, r4
; CHECK-NEXT:    bl __gnu_h2f_ieee
; CHECK-NEXT:    mov r1, sp
; CHECK-NEXT:    bl modff
; CHECK-NEXT:    bl __gnu_f2h_ieee
; CHECK-NEXT:    strh.w r0, [sp, #12]
; CHECK-NEXT:    add r0, sp, #12
; CHECK-NEXT:    vld1.32 {d8[0]}, [r0:32]
; CHECK-NEXT:    ldr r0, [sp, #4]
; CHECK-NEXT:    bl __gnu_f2h_ieee
; CHECK-NEXT:    ldr r1, [sp]
; CHECK-NEXT:    strh.w r0, [sp, #10]
; CHECK-NEXT:    mov r0, r1
; CHECK-NEXT:    bl __gnu_f2h_ieee
; CHECK-NEXT:    strh.w r0, [sp, #8]
; CHECK-NEXT:    add r0, sp, #8
; CHECK-NEXT:    vmovl.u16 q9, d8
; CHECK-NEXT:    vld1.32 {d16[0]}, [r0:32]
; CHECK-NEXT:    vmovl.u16 q8, d16
; CHECK-NEXT:    vmov.32 r0, d18[0]
; CHECK-NEXT:    vmov.32 r1, d18[1]
; CHECK-NEXT:    vmov.32 r2, d16[0]
; CHECK-NEXT:    vmov.32 r3, d16[1]
; CHECK-NEXT:    add sp, #16
; CHECK-NEXT:    vpop {d8}
; CHECK-NEXT:    pop {r4, pc}
;
; THUMB-LABEL: test_modf_v2f16:
; THUMB:       @ %bb.0:
; THUMB-NEXT:    push {r4, r5, r6, lr}
; THUMB-NEXT:    sub sp, #8
; THUMB-NEXT:    mov r5, r1
; THUMB-NEXT:    uxth r0, r0
; THUMB-NEXT:    bl __gnu_h2f_ieee
; THUMB-NEXT:    mov r1, sp
; THUMB-NEXT:    bl modff
; THUMB-NEXT:    bl __gnu_f2h_ieee
; THUMB-NEXT:    mov r4, r0
; THUMB-NEXT:    uxth r0, r5
; THUMB-NEXT:    bl __gnu_h2f_ieee
; THUMB-NEXT:    add r1, sp, #4
; THUMB-NEXT:    bl modff
; THUMB-NEXT:    bl __gnu_f2h_ieee
; THUMB-NEXT:    mov r5, r0
; THUMB-NEXT:    ldr r0, [sp]
; THUMB-NEXT:    bl __gnu_f2h_ieee
; THUMB-NEXT:    mov r6, r0
; THUMB-NEXT:    ldr r0, [sp, #4]
; THUMB-NEXT:    bl __gnu_f2h_ieee
; THUMB-NEXT:    mov r3, r0
; THUMB-NEXT:    mov r0, r4
; THUMB-NEXT:    mov r1, r5
; THUMB-NEXT:    mov r2, r6
; THUMB-NEXT:    add sp, #8
; THUMB-NEXT:    pop {r4, r5, r6, pc}
  %result = call { <2 x half>, <2 x half> } @llvm.modf.v2f16(<2 x half> %a)
  ret { <2 x half>, <2 x half> } %result
}

define { float, float } @test_modf_f32(float %a) {
; CHECK-LABEL: test_modf_f32:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    push {r7, lr}
; CHECK-NEXT:    sub sp, #8
; CHECK-NEXT:    add r1, sp, #4
; CHECK-NEXT:    bl modff
; CHECK-NEXT:    ldr r1, [sp, #4]
; CHECK-NEXT:    add sp, #8
; CHECK-NEXT:    pop {r7, pc}
;
; THUMB-LABEL: test_modf_f32:
; THUMB:       @ %bb.0:
; THUMB-NEXT:    push {r7, lr}
; THUMB-NEXT:    sub sp, #8
; THUMB-NEXT:    add r1, sp, #4
; THUMB-NEXT:    bl modff
; THUMB-NEXT:    ldr r1, [sp, #4]
; THUMB-NEXT:    add sp, #8
; THUMB-NEXT:    pop {r7, pc}
  %result = call { float, float } @llvm.modf.f32(float %a)
  ret { float, float } %result
}

define { <3 x float>, <3 x float> } @test_modf_v3f32(<3 x float> %a) {
; CHECK-LABEL: test_modf_v3f32:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    push {r4, r5, r6, lr}
; CHECK-NEXT:    vpush {d8, d9}
; CHECK-NEXT:    sub sp, #8
; CHECK-NEXT:    vldr d9, [sp, #40]
; CHECK-NEXT:    mov r4, r0
; CHECK-NEXT:    mov r1, sp
; CHECK-NEXT:    mov r0, r2
; CHECK-NEXT:    mov r6, r3
; CHECK-NEXT:    vmov d8, r2, r3
; CHECK-NEXT:    bl modff
; CHECK-NEXT:    add r1, sp, #4
; CHECK-NEXT:    mov r5, r0
; CHECK-NEXT:    mov r0, r6
; CHECK-NEXT:    bl modff
; CHECK-NEXT:    mov r6, r0
; CHECK-NEXT:    vmov r0, s18
; CHECK-NEXT:    vldmia sp, {s0, s1}
; CHECK-NEXT:    add.w r1, r4, #16
; CHECK-NEXT:    vst1.32 {d0}, [r1:64]!
; CHECK-NEXT:    bl modff
; CHECK-NEXT:    vmov s1, r6
; CHECK-NEXT:    vmov s0, r5
; CHECK-NEXT:    vst1.32 {d0}, [r4:64]!
; CHECK-NEXT:    str r0, [r4]
; CHECK-NEXT:    add sp, #8
; CHECK-NEXT:    vpop {d8, d9}
; CHECK-NEXT:    pop {r4, r5, r6, pc}
;
; THUMB-LABEL: test_modf_v3f32:
; THUMB:       @ %bb.0:
; THUMB-NEXT:    push {r4, r5, r6, r7, lr}
; THUMB-NEXT:    sub sp, #12
; THUMB-NEXT:    mov r7, r3
; THUMB-NEXT:    mov r5, r2
; THUMB-NEXT:    mov r4, r0
; THUMB-NEXT:    ldr r0, [sp, #32]
; THUMB-NEXT:    add r1, sp, #8
; THUMB-NEXT:    bl modff
; THUMB-NEXT:    mov r6, r0
; THUMB-NEXT:    ldr r0, [sp, #8]
; THUMB-NEXT:    str r0, [r4, #24]
; THUMB-NEXT:    add r1, sp, #4
; THUMB-NEXT:    mov r0, r7
; THUMB-NEXT:    bl modff
; THUMB-NEXT:    mov r7, r0
; THUMB-NEXT:    ldr r0, [sp, #4]
; THUMB-NEXT:    str r0, [r4, #20]
; THUMB-NEXT:    mov r1, sp
; THUMB-NEXT:    mov r0, r5
; THUMB-NEXT:    bl modff
; THUMB-NEXT:    ldr r1, [sp]
; THUMB-NEXT:    str r1, [r4, #16]
; THUMB-NEXT:    stm r4!, {r0, r7}
; THUMB-NEXT:    str r6, [r4]
; THUMB-NEXT:    add sp, #12
; THUMB-NEXT:    pop {r4, r5, r6, r7, pc}
  %result = call { <3 x float>, <3 x float> } @llvm.modf.v3f32(<3 x float> %a)
  ret { <3 x float>, <3 x float> } %result
}

define { <2 x float>, <2 x float> } @test_modf_v2f32(<2 x float> %a) {
; CHECK-LABEL: test_modf_v2f32:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    push {r4, lr}
; CHECK-NEXT:    vpush {d8}
; CHECK-NEXT:    sub sp, #8
; CHECK-NEXT:    vmov d8, r0, r1
; CHECK-NEXT:    mov r1, sp
; CHECK-NEXT:    vmov r0, s17
; CHECK-NEXT:    bl modff
; CHECK-NEXT:    mov r4, r0
; CHECK-NEXT:    vmov r0, s16
; CHECK-NEXT:    add r1, sp, #4
; CHECK-NEXT:    bl modff
; CHECK-NEXT:    vldr s1, [sp]
; CHECK-NEXT:    mov r1, r4
; CHECK-NEXT:    vldr s0, [sp, #4]
; CHECK-NEXT:    vmov r2, r3, d0
; CHECK-NEXT:    add sp, #8
; CHECK-NEXT:    vpop {d8}
; CHECK-NEXT:    pop {r4, pc}
;
; THUMB-LABEL: test_modf_v2f32:
; THUMB:       @ %bb.0:
; THUMB-NEXT:    push {r4, r5, r7, lr}
; THUMB-NEXT:    sub sp, #8
; THUMB-NEXT:    mov r4, r1
; THUMB-NEXT:    mov r1, sp
; THUMB-NEXT:    bl modff
; THUMB-NEXT:    mov r5, r0
; THUMB-NEXT:    add r1, sp, #4
; THUMB-NEXT:    mov r0, r4
; THUMB-NEXT:    bl modff
; THUMB-NEXT:    mov r1, r0
; THUMB-NEXT:    ldr r2, [sp]
; THUMB-NEXT:    ldr r3, [sp, #4]
; THUMB-NEXT:    mov r0, r5
; THUMB-NEXT:    add sp, #8
; THUMB-NEXT:    pop {r4, r5, r7, pc}
  %result = call { <2 x float>, <2 x float> } @llvm.modf.v2f32(<2 x float> %a)
  ret { <2 x float>, <2 x float> } %result
}

define { <2 x double>, <2 x double> } @test_modf_v2f64(<2 x double> %a) {
; CHECK-LABEL: test_modf_v2f64:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    push {r4, lr}
; CHECK-NEXT:    vpush {d8, d9}
; CHECK-NEXT:    sub sp, #16
; CHECK-NEXT:    mov r1, r3
; CHECK-NEXT:    mov r3, r2
; CHECK-NEXT:    add r2, sp, #8
; CHECK-NEXT:    mov r4, r0
; CHECK-NEXT:    mov r0, r3
; CHECK-NEXT:    bl modf
; CHECK-NEXT:    ldrd r12, r3, [sp, #40]
; CHECK-NEXT:    vmov d8, r0, r1
; CHECK-NEXT:    mov r2, sp
; CHECK-NEXT:    mov r1, r3
; CHECK-NEXT:    mov r0, r12
; CHECK-NEXT:    bl modf
; CHECK-NEXT:    vmov d9, r0, r1
; CHECK-NEXT:    vldr d17, [sp]
; CHECK-NEXT:    vldr d16, [sp, #8]
; CHECK-NEXT:    vst1.64 {d8, d9}, [r4]!
; CHECK-NEXT:    vst1.64 {d16, d17}, [r4]
; CHECK-NEXT:    add sp, #16
; CHECK-NEXT:    vpop {d8, d9}
; CHECK-NEXT:    pop {r4, pc}
;
; THUMB-LABEL: test_modf_v2f64:
; THUMB:       @ %bb.0:
; THUMB-NEXT:    push {r4, r5, r6, r7, lr}
; THUMB-NEXT:    sub sp, #28
; THUMB-NEXT:    str r3, [sp, #4] @ 4-byte Spill
; THUMB-NEXT:    mov r7, r2
; THUMB-NEXT:    mov r4, r0
; THUMB-NEXT:    ldr r0, [sp, #48]
; THUMB-NEXT:    ldr r1, [sp, #52]
; THUMB-NEXT:    add r2, sp, #16
; THUMB-NEXT:    bl modf
; THUMB-NEXT:    mov r6, r0
; THUMB-NEXT:    mov r5, r1
; THUMB-NEXT:    ldr r0, [sp, #20]
; THUMB-NEXT:    str r0, [r4, #28]
; THUMB-NEXT:    ldr r0, [sp, #16]
; THUMB-NEXT:    str r0, [r4, #24]
; THUMB-NEXT:    add r2, sp, #8
; THUMB-NEXT:    mov r0, r7
; THUMB-NEXT:    ldr r1, [sp, #4] @ 4-byte Reload
; THUMB-NEXT:    bl modf
; THUMB-NEXT:    ldr r2, [sp, #12]
; THUMB-NEXT:    str r2, [r4, #20]
; THUMB-NEXT:    ldr r2, [sp, #8]
; THUMB-NEXT:    str r2, [r4, #16]
; THUMB-NEXT:    str r5, [r4, #12]
; THUMB-NEXT:    stm r4!, {r0, r1, r6}
; THUMB-NEXT:    add sp, #28
; THUMB-NEXT:    pop {r4, r5, r6, r7, pc}
  %result = call { <2 x double>, <2 x double> } @llvm.modf.v2f64(<2 x double> %a)
  ret { <2 x double>, <2 x double> } %result
}

define { double, double } @test_modf_f64(double %a) {
; CHECK-LABEL: test_modf_f64:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    push {r7, lr}
; CHECK-NEXT:    sub sp, #8
; CHECK-NEXT:    mov r2, sp
; CHECK-NEXT:    bl modf
; CHECK-NEXT:    ldrd r2, r3, [sp], #8
; CHECK-NEXT:    pop {r7, pc}
;
; THUMB-LABEL: test_modf_f64:
; THUMB:       @ %bb.0:
; THUMB-NEXT:    push {r7, lr}
; THUMB-NEXT:    sub sp, #8
; THUMB-NEXT:    mov r2, sp
; THUMB-NEXT:    bl modf
; THUMB-NEXT:    ldr r2, [sp]
; THUMB-NEXT:    ldr r3, [sp, #4]
; THUMB-NEXT:    add sp, #8
; THUMB-NEXT:    pop {r7, pc}
  %result = call { double, double } @llvm.modf.f64(double %a)
  ret { double, double } %result
}

define double @test_modf_f64_only_use_intergral(double %a) {
; CHECK-LABEL: test_modf_f64_only_use_intergral:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    push {r7, lr}
; CHECK-NEXT:    sub sp, #8
; CHECK-NEXT:    mov r2, sp
; CHECK-NEXT:    bl modf
; CHECK-NEXT:    ldrd r0, r1, [sp], #8
; CHECK-NEXT:    pop {r7, pc}
;
; THUMB-LABEL: test_modf_f64_only_use_intergral:
; THUMB:       @ %bb.0:
; THUMB-NEXT:    push {r7, lr}
; THUMB-NEXT:    sub sp, #8
; THUMB-NEXT:    mov r2, sp
; THUMB-NEXT:    bl modf
; THUMB-NEXT:    ldr r0, [sp]
; THUMB-NEXT:    ldr r1, [sp, #4]
; THUMB-NEXT:    add sp, #8
; THUMB-NEXT:    pop {r7, pc}
  %result = call { double, double } @llvm.modf.f64(double %a)
  %result.1 = extractvalue { double, double } %result, 1
  ret double %result.1
}

define double @test_modf_f64_only_use_fractional(double %a) {
; CHECK-LABEL: test_modf_f64_only_use_fractional:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    push {r7, lr}
; CHECK-NEXT:    sub sp, #8
; CHECK-NEXT:    mov r2, sp
; CHECK-NEXT:    bl modf
; CHECK-NEXT:    add sp, #8
; CHECK-NEXT:    pop {r7, pc}
;
; THUMB-LABEL: test_modf_f64_only_use_fractional:
; THUMB:       @ %bb.0:
; THUMB-NEXT:    push {r7, lr}
; THUMB-NEXT:    sub sp, #8
; THUMB-NEXT:    mov r2, sp
; THUMB-NEXT:    bl modf
; THUMB-NEXT:    add sp, #8
; THUMB-NEXT:    pop {r7, pc}
  %result = call { double, double } @llvm.modf.f64(double %a)
  %result.1 = extractvalue { double, double } %result, 0
  ret double %result.1
}

define { double, double } @test_modf_f64_tail_call(double %a) {
; CHECK-LABEL: test_modf_f64_tail_call:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    push {r7, lr}
; CHECK-NEXT:    sub sp, #8
; CHECK-NEXT:    mov r2, sp
; CHECK-NEXT:    bl modf
; CHECK-NEXT:    ldrd r2, r3, [sp], #8
; CHECK-NEXT:    pop {r7, pc}
;
; THUMB-LABEL: test_modf_f64_tail_call:
; THUMB:       @ %bb.0:
; THUMB-NEXT:    push {r7, lr}
; THUMB-NEXT:    sub sp, #8
; THUMB-NEXT:    mov r2, sp
; THUMB-NEXT:    bl modf
; THUMB-NEXT:    ldr r2, [sp]
; THUMB-NEXT:    ldr r3, [sp, #4]
; THUMB-NEXT:    add sp, #8
; THUMB-NEXT:    pop {r7, pc}
  %result = tail call { double, double } @llvm.modf.f64(double %a)
  ret { double, double } %result
}

define double @test_modf_f64_only_use_intergral_tail_call(double %a) {
; CHECK-LABEL: test_modf_f64_only_use_intergral_tail_call:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    push {r7, lr}
; CHECK-NEXT:    sub sp, #8
; CHECK-NEXT:    mov r2, sp
; CHECK-NEXT:    bl modf
; CHECK-NEXT:    ldrd r0, r1, [sp], #8
; CHECK-NEXT:    pop {r7, pc}
;
; THUMB-LABEL: test_modf_f64_only_use_intergral_tail_call:
; THUMB:       @ %bb.0:
; THUMB-NEXT:    push {r7, lr}
; THUMB-NEXT:    sub sp, #8
; THUMB-NEXT:    mov r2, sp
; THUMB-NEXT:    bl modf
; THUMB-NEXT:    ldr r0, [sp]
; THUMB-NEXT:    ldr r1, [sp, #4]
; THUMB-NEXT:    add sp, #8
; THUMB-NEXT:    pop {r7, pc}
  %result = tail call { double, double } @llvm.modf.f64(double %a)
  %result.1 = extractvalue { double, double } %result, 1
  ret double %result.1
}

define double @test_modf_f64_only_use_fractional_tail_call(double %a) {
; CHECK-LABEL: test_modf_f64_only_use_fractional_tail_call:
; CHECK:       @ %bb.0:
; CHECK-NEXT:    push {r7, lr}
; CHECK-NEXT:    sub sp, #8
; CHECK-NEXT:    mov r2, sp
; CHECK-NEXT:    bl modf
; CHECK-NEXT:    add sp, #8
; CHECK-NEXT:    pop {r7, pc}
;
; THUMB-LABEL: test_modf_f64_only_use_fractional_tail_call:
; THUMB:       @ %bb.0:
; THUMB-NEXT:    push {r7, lr}
; THUMB-NEXT:    sub sp, #8
; THUMB-NEXT:    mov r2, sp
; THUMB-NEXT:    bl modf
; THUMB-NEXT:    add sp, #8
; THUMB-NEXT:    pop {r7, pc}
  %result = tail call { double, double } @llvm.modf.f64(double %a)
  %result.1 = extractvalue { double, double } %result, 0
  ret double %result.1
}