test/Transforms/InstCombine/AMDGPU/ldexp.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -mtriple=amdgcn-amd-amdhsa -instcombine -S | FileCheck %s

define float @ldexp_f32_undef_undef() {
; CHECK-LABEL: @ldexp_f32_undef_undef(
; CHECK-NEXT:    ret float 0x7FF8000000000000
;
  %call = call float @llvm.amdgcn.ldexp.f32(float undef, i32 undef)
  ret float %call
}

; If the exponent is 0, it doesn't matter if the first argument is
; constant or not.
define void @ldexp_f32_exp0(float %x) {
; CHECK-LABEL: @ldexp_f32_exp0(
; CHECK-NEXT:    store volatile float [[X:%.*]], float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float [[X]], float addrspace(1)* undef, align 4
; CHECK-NEXT:    [[ONE:%.*]] = call float @llvm.amdgcn.ldexp.f32(float [[X]], i32 1)
; CHECK-NEXT:    store volatile float [[ONE]], float addrspace(1)* undef, align 4
; CHECK-NEXT:    ret void
;
  %zero = call float @llvm.amdgcn.ldexp.f32(float %x, i32 0)
  store volatile float %zero, float addrspace(1)* undef

  %undef = call float @llvm.amdgcn.ldexp.f32(float %x, i32 undef)
  store volatile float %undef, float addrspace(1)* undef

  %one = call float @llvm.amdgcn.ldexp.f32(float %x, i32 1)
  store volatile float %one, float addrspace(1)* undef
  ret void
}

; Test variable exponent but zero or undef value.
define void @ldexp_f32_val0(i32 %y) {
; CHECK-LABEL: @ldexp_f32_val0(
; CHECK-NEXT:    store volatile float 0.000000e+00, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float -0.000000e+00, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0x7FF8000000000000, float addrspace(1)* undef, align 4
; CHECK-NEXT:    ret void
;
  %zero = call float @llvm.amdgcn.ldexp.f32(float 0.0, i32 %y)
  store volatile float %zero, float addrspace(1)* undef

  %neg.zero = call float @llvm.amdgcn.ldexp.f32(float -0.0, i32 %y)
  store volatile float %neg.zero, float addrspace(1)* undef

  %undef = call float @llvm.amdgcn.ldexp.f32(float undef, i32 %y)
  store volatile float %undef, float addrspace(1)* undef
  ret void
}

define void @ldexp_f32_val_infinity(i32 %y) {
; CHECK-LABEL: @ldexp_f32_val_infinity(
; CHECK-NEXT:    store volatile float 0x7FF0000000000000, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0xFFF0000000000000, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0x7FF0000000000000, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0xFFF0000000000000, float addrspace(1)* undef, align 4
; CHECK-NEXT:    ret void
;
  %inf = call float @llvm.amdgcn.ldexp.f32(float 0x7ff0000000000000, i32 %y)
  store volatile float %inf, float addrspace(1)* undef

  %neg.inf = call float @llvm.amdgcn.ldexp.f32(float 0xfff0000000000000, i32 %y)
  store volatile float %neg.inf, float addrspace(1)* undef

  %inf.zero = call float @llvm.amdgcn.ldexp.f32(float 0x7ff0000000000000, i32 0)
  store volatile float %inf.zero, float addrspace(1)* undef

  %neg.inf.zero = call float @llvm.amdgcn.ldexp.f32(float 0xfff0000000000000, i32 0)
  store volatile float %neg.inf.zero, float addrspace(1)* undef

  ret void
}

; Signaling nan should be quieted.
; Technically this depends on the ieee_mode in the mode register.
define void @ldexp_f32_val_nan(i32 %y) {
; CHECK-LABEL: @ldexp_f32_val_nan(
; CHECK-NEXT:    store volatile float 0x7FF8001000000000, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0xFFF8000100000000, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0x7FF8000020000000, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0xFFFFFFFFE0000000, float addrspace(1)* undef, align 4
; CHECK-NEXT:    ret void
;
  %plus.qnan = call float @llvm.amdgcn.ldexp.f32(float 0x7ff0001000000000, i32 %y)
  store volatile float %plus.qnan, float addrspace(1)* undef

  %neg.qnan = call float @llvm.amdgcn.ldexp.f32(float 0xfff0000100000000, i32 %y)
  store volatile float %neg.qnan, float addrspace(1)* undef

  %plus.snan = call float @llvm.amdgcn.ldexp.f32(float 0x7FF0000020000000, i32 %y)
  store volatile float %plus.snan, float addrspace(1)* undef

  %neg.snan = call float @llvm.amdgcn.ldexp.f32(float 0xFFF7FFFFE0000000, i32 %y)
  store volatile float %neg.snan, float addrspace(1)* undef

  ret void
}

define void @ldexp_f32_val_nan_strictfp(i32 %y) #0 {
; CHECK-LABEL: @ldexp_f32_val_nan_strictfp(
; CHECK-NEXT:    [[PLUS_QNAN:%.*]] = call float @llvm.amdgcn.ldexp.f32(float 0x7FF0001000000000, i32 [[Y:%.*]]) [[ATTR0:#.*]]
; CHECK-NEXT:    store volatile float [[PLUS_QNAN]], float addrspace(1)* undef, align 4
; CHECK-NEXT:    [[NEG_QNAN:%.*]] = call float @llvm.amdgcn.ldexp.f32(float 0xFFF0000100000000, i32 [[Y]]) [[ATTR0]]
; CHECK-NEXT:    store volatile float [[NEG_QNAN]], float addrspace(1)* undef, align 4
; CHECK-NEXT:    [[PLUS_SNAN:%.*]] = call float @llvm.amdgcn.ldexp.f32(float 0x7FF0000020000000, i32 [[Y]]) [[ATTR0]]
; CHECK-NEXT:    store volatile float [[PLUS_SNAN]], float addrspace(1)* undef, align 4
; CHECK-NEXT:    [[NEG_SNAN:%.*]] = call float @llvm.amdgcn.ldexp.f32(float 0xFFF7FFFFE0000000, i32 [[Y]]) [[ATTR0]]
; CHECK-NEXT:    store volatile float [[NEG_SNAN]], float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0x7FF8000000000000, float addrspace(1)* undef, align 4
; CHECK-NEXT:    ret void
;
  %plus.qnan = call float @llvm.amdgcn.ldexp.f32(float 0x7ff0001000000000, i32 %y) #0
  store volatile float %plus.qnan, float addrspace(1)* undef

  %neg.qnan = call float @llvm.amdgcn.ldexp.f32(float 0xfff0000100000000, i32 %y) #0
  store volatile float %neg.qnan, float addrspace(1)* undef

  %plus.snan = call float @llvm.amdgcn.ldexp.f32(float 0x7FF0000020000000, i32 %y) #0
  store volatile float %plus.snan, float addrspace(1)* undef

  %neg.snan = call float @llvm.amdgcn.ldexp.f32(float 0xFFF7FFFFE0000000, i32 %y) #0
  store volatile float %neg.snan, float addrspace(1)* undef

  %undef = call float @llvm.amdgcn.ldexp.f32(float undef, i32 %y) #0
  store volatile float %undef, float addrspace(1)* undef

  ret void
}

define void @ldexp_f32_0() {
; CHECK-LABEL: @ldexp_f32_0(
; CHECK-NEXT:    store volatile float 0.000000e+00, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float -0.000000e+00, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0.000000e+00, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0.000000e+00, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0.000000e+00, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0.000000e+00, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0.000000e+00, float addrspace(1)* undef, align 4
; CHECK-NEXT:    ret void
;
  %zero = call float @llvm.amdgcn.ldexp.f32(float 0.0, i32 0)
  store volatile float %zero, float addrspace(1)* undef

  %neg.zero = call float @llvm.amdgcn.ldexp.f32(float -0.0, i32 0)
  store volatile float %neg.zero, float addrspace(1)* undef

  %one = call float @llvm.amdgcn.ldexp.f32(float 0.0, i32 1)
  store volatile float %one, float addrspace(1)* undef

  %min.exp = call float @llvm.amdgcn.ldexp.f32(float 0.0, i32 -126)
  store volatile float %min.exp, float addrspace(1)* undef

  %min.exp.sub1 = call float @llvm.amdgcn.ldexp.f32(float 0.0, i32 -127)
  store volatile float %min.exp.sub1, float addrspace(1)* undef

  %max.exp = call float @llvm.amdgcn.ldexp.f32(float 0.0, i32 127)
  store volatile float %max.exp, float addrspace(1)* undef

  %max.exp.plus1 = call float @llvm.amdgcn.ldexp.f32(float 0.0, i32 128)
  store volatile float %max.exp.plus1, float addrspace(1)* undef

  ret void
}

; Should be able to ignore strictfp in this case
define void @ldexp_f32_0_strictfp(float %x) #0 {
; CHECK-LABEL: @ldexp_f32_0_strictfp(
; CHECK-NEXT:    store volatile float 0.000000e+00, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float -0.000000e+00, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0.000000e+00, float addrspace(1)* undef, align 4
; CHECK-NEXT:    [[UNKNOWN_ZERO:%.*]] = call float @llvm.amdgcn.ldexp.f32(float [[X:%.*]], i32 0) [[ATTR0]]
; CHECK-NEXT:    store volatile float [[UNKNOWN_ZERO]], float addrspace(1)* undef, align 4
; CHECK-NEXT:    [[UNKNOWN_UNDEF:%.*]] = call float @llvm.amdgcn.ldexp.f32(float [[X]], i32 undef) [[ATTR0]]
; CHECK-NEXT:    store volatile float [[UNKNOWN_UNDEF]], float addrspace(1)* undef, align 4
; CHECK-NEXT:    [[DENORMAL_0:%.*]] = call float @llvm.amdgcn.ldexp.f32(float 0x380FFFFFC0000000, i32 0) [[ATTR0]]
; CHECK-NEXT:    store volatile float [[DENORMAL_0]], float addrspace(1)* undef, align 4
; CHECK-NEXT:    [[DENORMAL_1:%.*]] = call float @llvm.amdgcn.ldexp.f32(float 0x380FFFFFC0000000, i32 1) [[ATTR0]]
; CHECK-NEXT:    store volatile float [[DENORMAL_1]], float addrspace(1)* undef, align 4
; CHECK-NEXT:    ret void
;
  %zero = call float @llvm.amdgcn.ldexp.f32(float 0.0, i32 0) #0
  store volatile float %zero, float addrspace(1)* undef

  %neg.zero = call float @llvm.amdgcn.ldexp.f32(float -0.0, i32 0) #0
  store volatile float %neg.zero, float addrspace(1)* undef

  %one = call float @llvm.amdgcn.ldexp.f32(float 0.0, i32 1) #0
  store volatile float %one, float addrspace(1)* undef

  %unknown.zero = call float @llvm.amdgcn.ldexp.f32(float %x, i32 0) #0
  store volatile float %unknown.zero, float addrspace(1)* undef

  %unknown.undef = call float @llvm.amdgcn.ldexp.f32(float %x, i32 undef) #0
  store volatile float %unknown.undef, float addrspace(1)* undef

  %denormal.0 = call float @llvm.amdgcn.ldexp.f32(float 0x380FFFFFC0000000, i32 0) #0
  store volatile float %denormal.0, float addrspace(1)* undef

  %denormal.1 = call float @llvm.amdgcn.ldexp.f32(float 0x380FFFFFC0000000, i32 1) #0
  store volatile float %denormal.1, float addrspace(1)* undef

  ret void
}

define void @ldexp_f32() {
; CHECK-LABEL: @ldexp_f32(
; CHECK-NEXT:    store volatile float 2.000000e+00, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 4.000000e+00, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 8.000000e+00, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 5.000000e-01, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0x3810000000000000, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0x3800000000000000, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0x47E0000000000000, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0x7FF0000000000000, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float -2.000000e+00, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float -4.000000e+00, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float -8.000000e+00, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float -5.000000e-01, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0xB810000000000000, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0xB800000000000000, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0xC7E0000000000000, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0xFFF0000000000000, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0x44D5000000000000, float addrspace(1)* undef, align 4
; CHECK-NEXT:    ret void
;
  %one.one = call float @llvm.amdgcn.ldexp.f32(float 1.0, i32 1)
  store volatile float %one.one, float addrspace(1)* undef

  %one.two = call float @llvm.amdgcn.ldexp.f32(float 1.0, i32 2)
  store volatile float %one.two, float addrspace(1)* undef

  %one.three = call float @llvm.amdgcn.ldexp.f32(float 1.0, i32 3)
  store volatile float %one.three, float addrspace(1)* undef

  %one.negone = call float @llvm.amdgcn.ldexp.f32(float 1.0, i32 -1)
  store volatile float %one.negone, float addrspace(1)* undef

  %one.min.exp = call float @llvm.amdgcn.ldexp.f32(float 1.0, i32 -126)
  store volatile float %one.min.exp, float addrspace(1)* undef

  %one.min.exp.sub1 = call float @llvm.amdgcn.ldexp.f32(float 1.0, i32 -127)
  store volatile float %one.min.exp.sub1, float addrspace(1)* undef

  %one.max.exp = call float @llvm.amdgcn.ldexp.f32(float 1.0, i32 127)
  store volatile float %one.max.exp, float addrspace(1)* undef

  %one.max.exp.plus1 = call float @llvm.amdgcn.ldexp.f32(float 1.0, i32 128)
  store volatile float %one.max.exp.plus1, float addrspace(1)* undef

  %neg.one.one = call float @llvm.amdgcn.ldexp.f32(float -1.0, i32 1)
  store volatile float %neg.one.one, float addrspace(1)* undef

  %neg.one.two = call float @llvm.amdgcn.ldexp.f32(float -1.0, i32 2)
  store volatile float %neg.one.two, float addrspace(1)* undef

  %neg.one.three = call float @llvm.amdgcn.ldexp.f32(float -1.0, i32 3)
  store volatile float %neg.one.three, float addrspace(1)* undef

  %neg.one.negone = call float @llvm.amdgcn.ldexp.f32(float -1.0, i32 -1)
  store volatile float %neg.one.negone, float addrspace(1)* undef

  %neg.one.min.exp = call float @llvm.amdgcn.ldexp.f32(float -1.0, i32 -126)
  store volatile float %neg.one.min.exp, float addrspace(1)* undef

  %neg.one.min.exp.sub1 = call float @llvm.amdgcn.ldexp.f32(float -1.0, i32 -127)
  store volatile float %neg.one.min.exp.sub1, float addrspace(1)* undef

  %neg.one.max.exp = call float @llvm.amdgcn.ldexp.f32(float -1.0, i32 127)
  store volatile float %neg.one.max.exp, float addrspace(1)* undef

  %neg.one.max.exp.plus1 = call float @llvm.amdgcn.ldexp.f32(float -1.0, i32 128)
  store volatile float %neg.one.max.exp.plus1, float addrspace(1)* undef

  %fortytwo.seven = call float @llvm.amdgcn.ldexp.f32(float 42.0, i32 73)
  store volatile float %fortytwo.seven, float addrspace(1)* undef

  ret void
}

; Technically we should probably flush these depending on the expected
; denormal mode of the function, but no other IR constant folding
; considers this.
define void @ldexp_f32_denormal() {
; CHECK-LABEL: @ldexp_f32_denormal(
; CHECK-NEXT:    store volatile float 0x380FFFFFC0000000, float addrspace(1)* undef, align 4
; CHECK-NEXT:    store volatile float 0x381FFFFFC0000000, float addrspace(1)* undef, align 4
; CHECK-NEXT:    ret void
;
  %denormal.0 = call float @llvm.amdgcn.ldexp.f32(float 0x380FFFFFC0000000, i32 0)
  store volatile float %denormal.0, float addrspace(1)* undef

  %denormal.1 = call float @llvm.amdgcn.ldexp.f32(float 0x380FFFFFC0000000, i32 1)
  store volatile float %denormal.1, float addrspace(1)* undef

  ret void
}

define void @ldexp_f64() {
; CHECK-LABEL: @ldexp_f64(
; CHECK-NEXT:    store volatile double 2.000000e+00, double addrspace(1)* undef, align 8
; CHECK-NEXT:    store volatile double 4.000000e+00, double addrspace(1)* undef, align 8
; CHECK-NEXT:    store volatile double 0x44D5000000000000, double addrspace(1)* undef, align 8
; CHECK-NEXT:    ret void
;
  %one.one = call double @llvm.amdgcn.ldexp.f64(double 1.0, i32 1)
  store volatile double %one.one, double addrspace(1)* undef

  %one.two = call double @llvm.amdgcn.ldexp.f64(double 1.0, i32 2)
  store volatile double %one.two, double addrspace(1)* undef

  %fortytwo.seven = call double @llvm.amdgcn.ldexp.f64(double 42.0, i32 73)
  store volatile double %fortytwo.seven, double addrspace(1)* undef

  ret void
}

define void @ldexp_f16() {
; CHECK-LABEL: @ldexp_f16(
; CHECK-NEXT:    store volatile half 0xH4000, half addrspace(1)* undef, align 2
; CHECK-NEXT:    store volatile half 0xH4400, half addrspace(1)* undef, align 2
; CHECK-NEXT:    store volatile half 0xH7C00, half addrspace(1)* undef, align 2
; CHECK-NEXT:    ret void
;
  %one.one = call half @llvm.amdgcn.ldexp.f16(half 1.0, i32 1)
  store volatile half %one.one, half addrspace(1)* undef

  %one.two = call half @llvm.amdgcn.ldexp.f16(half 1.0, i32 2)
  store volatile half %one.two, half addrspace(1)* undef

  %fortytwo.seven = call half @llvm.amdgcn.ldexp.f16(half 42.0, i32 73)
  store volatile half %fortytwo.seven, half addrspace(1)* undef

  ret void
}

declare half @llvm.amdgcn.ldexp.f16(half, i32) #1
declare float @llvm.amdgcn.ldexp.f32(float, i32) #1
declare double @llvm.amdgcn.ldexp.f64(double, i32) #1

attributes #0 = { strictfp }
attributes #1 = { nounwind readnone speculatable }