nuudlman/llvm: llvm/test/Transforms/InstCombine/exp2-1.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; Test that the exp2 library call simplifier works correctly.
;
; RUN: opt < %s -passes=instcombine -S -mtriple=unknown | FileCheck %s -check-prefixes=LDEXP32
; RUN: opt < %s -passes=instcombine -S -mtriple=msp430 | FileCheck %s -check-prefixes=LDEXP16
; RUN: opt < %s -passes=instcombine -S -mtriple=i386-pc-win32 | FileCheck %s -check-prefixes=NOLDEXPF
; RUN: opt < %s -passes=instcombine -S -mtriple=amdgcn-unknown-unknown | FileCheck %s -check-prefixes=NOLDEXP

target datalayout = "e-p:32:32:32-i1:8:8-i8:8:8-i16:16:16-i32:32:32-i64:32:64-f32:32:32-f64:32:64-v64:64:64-v128:128:128-a0:0:64-f80:128:128"

declare double @exp2(double)
declare float @exp2f(float)

; Check exp2(sitofp(x)) -> ldexp(1.0, sext(x)).

define double @test_simplify1(i32 %x) {
; LDEXP32-LABEL: @test_simplify1(
; LDEXP32-NEXT:    [[LDEXP:%.*]] = call double @ldexp(double 1.000000e+00, i32 [[X:%.*]])
; LDEXP32-NEXT:    ret double [[LDEXP]]
;
; LDEXP16-LABEL: @test_simplify1(
; LDEXP16-NEXT:    [[CONV:%.*]] = sitofp i32 [[X:%.*]] to double
; LDEXP16-NEXT:    [[RET:%.*]] = call double @exp2(double [[CONV]])
; LDEXP16-NEXT:    ret double [[RET]]
;
; NOLDEXPF-LABEL: @test_simplify1(
; NOLDEXPF-NEXT:    [[LDEXP:%.*]] = call double @ldexp(double 1.000000e+00, i32 [[X:%.*]])
; NOLDEXPF-NEXT:    ret double [[LDEXP]]
;
; NOLDEXP-LABEL: @test_simplify1(
; NOLDEXP-NEXT:    [[CONV:%.*]] = sitofp i32 [[X:%.*]] to double
; NOLDEXP-NEXT:    [[RET:%.*]] = call double @exp2(double [[CONV]])
; NOLDEXP-NEXT:    ret double [[RET]]
;
  %conv = sitofp i32 %x to double
  %ret = call double @exp2(double %conv)
  ret double %ret
}

define double @test_simplify2(i16 signext %x) {
; LDEXP32-LABEL: @test_simplify2(
; LDEXP32-NEXT:    [[TMP1:%.*]] = sext i16 [[X:%.*]] to i32
; LDEXP32-NEXT:    [[LDEXP:%.*]] = call double @ldexp(double 1.000000e+00, i32 [[TMP1]])
; LDEXP32-NEXT:    ret double [[LDEXP]]
;
; LDEXP16-LABEL: @test_simplify2(
; LDEXP16-NEXT:    [[LDEXP:%.*]] = call double @ldexp(double 1.000000e+00, i16 [[X:%.*]])
; LDEXP16-NEXT:    ret double [[LDEXP]]
;
; NOLDEXPF-LABEL: @test_simplify2(
; NOLDEXPF-NEXT:    [[TMP1:%.*]] = sext i16 [[X:%.*]] to i32
; NOLDEXPF-NEXT:    [[LDEXP:%.*]] = call double @ldexp(double 1.000000e+00, i32 [[TMP1]])
; NOLDEXPF-NEXT:    ret double [[LDEXP]]
;
; NOLDEXP-LABEL: @test_simplify2(
; NOLDEXP-NEXT:    [[CONV:%.*]] = sitofp i16 [[X:%.*]] to double
; NOLDEXP-NEXT:    [[RET:%.*]] = call double @exp2(double [[CONV]])
; NOLDEXP-NEXT:    ret double [[RET]]
;
  %conv = sitofp i16 %x to double
  %ret = call double @exp2(double %conv)
  ret double %ret
}

define double @test_simplify3(i8 signext %x) {
; LDEXP32-LABEL: @test_simplify3(
; LDEXP32-NEXT:    [[TMP1:%.*]] = sext i8 [[X:%.*]] to i32
; LDEXP32-NEXT:    [[LDEXP:%.*]] = call double @ldexp(double 1.000000e+00, i32 [[TMP1]])
; LDEXP32-NEXT:    ret double [[LDEXP]]
;
; LDEXP16-LABEL: @test_simplify3(
; LDEXP16-NEXT:    [[TMP1:%.*]] = sext i8 [[X:%.*]] to i16
; LDEXP16-NEXT:    [[LDEXP:%.*]] = call double @ldexp(double 1.000000e+00, i16 [[TMP1]])
; LDEXP16-NEXT:    ret double [[LDEXP]]
;
; NOLDEXPF-LABEL: @test_simplify3(
; NOLDEXPF-NEXT:    [[TMP1:%.*]] = sext i8 [[X:%.*]] to i32
; NOLDEXPF-NEXT:    [[LDEXP:%.*]] = call double @ldexp(double 1.000000e+00, i32 [[TMP1]])
; NOLDEXPF-NEXT:    ret double [[LDEXP]]
;
; NOLDEXP-LABEL: @test_simplify3(
; NOLDEXP-NEXT:    [[CONV:%.*]] = sitofp i8 [[X:%.*]] to double
; NOLDEXP-NEXT:    [[RET:%.*]] = call double @exp2(double [[CONV]])
; NOLDEXP-NEXT:    ret double [[RET]]
;
  %conv = sitofp i8 %x to double
  %ret = call double @exp2(double %conv)
  ret double %ret
}

define float @test_simplify4(i32 %x) {
; LDEXP32-LABEL: @test_simplify4(
; LDEXP32-NEXT:    [[LDEXPF:%.*]] = call float @ldexpf(float 1.000000e+00, i32 [[X:%.*]])
; LDEXP32-NEXT:    ret float [[LDEXPF]]
;
; LDEXP16-LABEL: @test_simplify4(
; LDEXP16-NEXT:    [[CONV:%.*]] = sitofp i32 [[X:%.*]] to float
; LDEXP16-NEXT:    [[RET:%.*]] = call float @exp2f(float [[CONV]])
; LDEXP16-NEXT:    ret float [[RET]]
;
; NOLDEXPF-LABEL: @test_simplify4(
; NOLDEXPF-NEXT:    [[CONV:%.*]] = sitofp i32 [[X:%.*]] to float
; NOLDEXPF-NEXT:    [[RET:%.*]] = call float @exp2f(float [[CONV]])
; NOLDEXPF-NEXT:    ret float [[RET]]
;
; NOLDEXP-LABEL: @test_simplify4(
; NOLDEXP-NEXT:    [[CONV:%.*]] = sitofp i32 [[X:%.*]] to float
; NOLDEXP-NEXT:    [[RET:%.*]] = call float @exp2f(float [[CONV]])
; NOLDEXP-NEXT:    ret float [[RET]]
;
  %conv = sitofp i32 %x to float
  %ret = call float @exp2f(float %conv)
  ret float %ret
}

; Check exp2(uitofp(x)) -> ldexp(1.0, zext(x)).

define double @test_no_simplify1(i32 %x) {
; LDEXP32-LABEL: @test_no_simplify1(
; LDEXP32-NEXT:    [[CONV:%.*]] = uitofp i32 [[X:%.*]] to double
; LDEXP32-NEXT:    [[RET:%.*]] = call double @exp2(double [[CONV]])
; LDEXP32-NEXT:    ret double [[RET]]
;
; LDEXP16-LABEL: @test_no_simplify1(
; LDEXP16-NEXT:    [[CONV:%.*]] = uitofp i32 [[X:%.*]] to double
; LDEXP16-NEXT:    [[RET:%.*]] = call double @exp2(double [[CONV]])
; LDEXP16-NEXT:    ret double [[RET]]
;
; NOLDEXPF-LABEL: @test_no_simplify1(
; NOLDEXPF-NEXT:    [[CONV:%.*]] = uitofp i32 [[X:%.*]] to double
; NOLDEXPF-NEXT:    [[RET:%.*]] = call double @exp2(double [[CONV]])
; NOLDEXPF-NEXT:    ret double [[RET]]
;
; NOLDEXP-LABEL: @test_no_simplify1(
; NOLDEXP-NEXT:    [[CONV:%.*]] = uitofp i32 [[X:%.*]] to double
; NOLDEXP-NEXT:    [[RET:%.*]] = call double @exp2(double [[CONV]])
; NOLDEXP-NEXT:    ret double [[RET]]
;
  %conv = uitofp i32 %x to double
  %ret = call double @exp2(double %conv)
  ret double %ret
}

define double @test_simplify6(i16 zeroext %x) {
; LDEXP32-LABEL: @test_simplify6(
; LDEXP32-NEXT:    [[TMP1:%.*]] = zext i16 [[X:%.*]] to i32
; LDEXP32-NEXT:    [[LDEXP:%.*]] = call double @ldexp(double 1.000000e+00, i32 [[TMP1]])
; LDEXP32-NEXT:    ret double [[LDEXP]]
;
; LDEXP16-LABEL: @test_simplify6(
; LDEXP16-NEXT:    [[CONV:%.*]] = uitofp i16 [[X:%.*]] to double
; LDEXP16-NEXT:    [[RET:%.*]] = call double @exp2(double [[CONV]])
; LDEXP16-NEXT:    ret double [[RET]]
;
; NOLDEXPF-LABEL: @test_simplify6(
; NOLDEXPF-NEXT:    [[TMP1:%.*]] = zext i16 [[X:%.*]] to i32
; NOLDEXPF-NEXT:    [[LDEXP:%.*]] = call double @ldexp(double 1.000000e+00, i32 [[TMP1]])
; NOLDEXPF-NEXT:    ret double [[LDEXP]]
;
; NOLDEXP-LABEL: @test_simplify6(
; NOLDEXP-NEXT:    [[CONV:%.*]] = uitofp i16 [[X:%.*]] to double
; NOLDEXP-NEXT:    [[RET:%.*]] = call double @exp2(double [[CONV]])
; NOLDEXP-NEXT:    ret double [[RET]]
;
  %conv = uitofp i16 %x to double
  %ret = call double @exp2(double %conv)
  ret double %ret
}

define double @test_simplify7(i8 zeroext %x) {
; LDEXP32-LABEL: @test_simplify7(
; LDEXP32-NEXT:    [[TMP1:%.*]] = zext i8 [[X:%.*]] to i32
; LDEXP32-NEXT:    [[LDEXP:%.*]] = call double @ldexp(double 1.000000e+00, i32 [[TMP1]])
; LDEXP32-NEXT:    ret double [[LDEXP]]
;
; LDEXP16-LABEL: @test_simplify7(
; LDEXP16-NEXT:    [[TMP1:%.*]] = zext i8 [[X:%.*]] to i16
; LDEXP16-NEXT:    [[LDEXP:%.*]] = call double @ldexp(double 1.000000e+00, i16 [[TMP1]])
; LDEXP16-NEXT:    ret double [[LDEXP]]
;
; NOLDEXPF-LABEL: @test_simplify7(
; NOLDEXPF-NEXT:    [[TMP1:%.*]] = zext i8 [[X:%.*]] to i32
; NOLDEXPF-NEXT:    [[LDEXP:%.*]] = call double @ldexp(double 1.000000e+00, i32 [[TMP1]])
; NOLDEXPF-NEXT:    ret double [[LDEXP]]
;
; NOLDEXP-LABEL: @test_simplify7(
; NOLDEXP-NEXT:    [[CONV:%.*]] = uitofp i8 [[X:%.*]] to double
; NOLDEXP-NEXT:    [[RET:%.*]] = call double @exp2(double [[CONV]])
; NOLDEXP-NEXT:    ret double [[RET]]
;
  %conv = uitofp i8 %x to double
  %ret = call double @exp2(double %conv)
  ret double %ret
}

define float @test_simplify8(i8 zeroext %x) {
; LDEXP32-LABEL: @test_simplify8(
; LDEXP32-NEXT:    [[TMP1:%.*]] = zext i8 [[X:%.*]] to i32
; LDEXP32-NEXT:    [[LDEXPF:%.*]] = call float @ldexpf(float 1.000000e+00, i32 [[TMP1]])
; LDEXP32-NEXT:    ret float [[LDEXPF]]
;
; LDEXP16-LABEL: @test_simplify8(
; LDEXP16-NEXT:    [[TMP1:%.*]] = zext i8 [[X:%.*]] to i16
; LDEXP16-NEXT:    [[LDEXPF:%.*]] = call float @ldexpf(float 1.000000e+00, i16 [[TMP1]])
; LDEXP16-NEXT:    ret float [[LDEXPF]]
;
; NOLDEXPF-LABEL: @test_simplify8(
; NOLDEXPF-NEXT:    [[CONV:%.*]] = uitofp i8 [[X:%.*]] to float
; NOLDEXPF-NEXT:    [[RET:%.*]] = call float @exp2f(float [[CONV]])
; NOLDEXPF-NEXT:    ret float [[RET]]
;
; NOLDEXP-LABEL: @test_simplify8(
; NOLDEXP-NEXT:    [[CONV:%.*]] = uitofp i8 [[X:%.*]] to float
; NOLDEXP-NEXT:    [[RET:%.*]] = call float @exp2f(float [[CONV]])
; NOLDEXP-NEXT:    ret float [[RET]]
;
  %conv = uitofp i8 %x to float
  %ret = call float @exp2f(float %conv)
  ret float %ret
}

declare double @llvm.exp2.f64(double)
declare float @llvm.exp2.f32(float)

define double @test_simplify9(i8 zeroext %x) {
; LDEXP32-LABEL: @test_simplify9(
; LDEXP32-NEXT:    [[TMP1:%.*]] = zext i8 [[X:%.*]] to i32
; LDEXP32-NEXT:    [[LDEXP:%.*]] = call double @ldexp(double 1.000000e+00, i32 [[TMP1]])
; LDEXP32-NEXT:    ret double [[LDEXP]]
;
; LDEXP16-LABEL: @test_simplify9(
; LDEXP16-NEXT:    [[TMP1:%.*]] = zext i8 [[X:%.*]] to i16
; LDEXP16-NEXT:    [[LDEXP:%.*]] = call double @ldexp(double 1.000000e+00, i16 [[TMP1]])
; LDEXP16-NEXT:    ret double [[LDEXP]]
;
; NOLDEXPF-LABEL: @test_simplify9(
; NOLDEXPF-NEXT:    [[TMP1:%.*]] = zext i8 [[X:%.*]] to i32
; NOLDEXPF-NEXT:    [[LDEXP:%.*]] = call double @ldexp(double 1.000000e+00, i32 [[TMP1]])
; NOLDEXPF-NEXT:    ret double [[LDEXP]]
;
; NOLDEXP-LABEL: @test_simplify9(
; NOLDEXP-NEXT:    [[CONV:%.*]] = uitofp i8 [[X:%.*]] to double
; NOLDEXP-NEXT:    [[RET:%.*]] = call double @llvm.exp2.f64(double [[CONV]])
; NOLDEXP-NEXT:    ret double [[RET]]
;
  %conv = uitofp i8 %x to double
  %ret = call double @llvm.exp2.f64(double %conv)
  ret double %ret
}

define float @test_simplify10(i8 zeroext %x) {
; LDEXP32-LABEL: @test_simplify10(
; LDEXP32-NEXT:    [[TMP1:%.*]] = zext i8 [[X:%.*]] to i32
; LDEXP32-NEXT:    [[LDEXPF:%.*]] = call float @ldexpf(float 1.000000e+00, i32 [[TMP1]])
; LDEXP32-NEXT:    ret float [[LDEXPF]]
;
; LDEXP16-LABEL: @test_simplify10(
; LDEXP16-NEXT:    [[TMP1:%.*]] = zext i8 [[X:%.*]] to i16
; LDEXP16-NEXT:    [[LDEXPF:%.*]] = call float @ldexpf(float 1.000000e+00, i16 [[TMP1]])
; LDEXP16-NEXT:    ret float [[LDEXPF]]
;
; NOLDEXPF-LABEL: @test_simplify10(
; NOLDEXPF-NEXT:    [[CONV:%.*]] = uitofp i8 [[X:%.*]] to float
; NOLDEXPF-NEXT:    [[RET:%.*]] = call float @llvm.exp2.f32(float [[CONV]])
; NOLDEXPF-NEXT:    ret float [[RET]]
;
; NOLDEXP-LABEL: @test_simplify10(
; NOLDEXP-NEXT:    [[CONV:%.*]] = uitofp i8 [[X:%.*]] to float
; NOLDEXP-NEXT:    [[RET:%.*]] = call float @llvm.exp2.f32(float [[CONV]])
; NOLDEXP-NEXT:    ret float [[RET]]
;
  %conv = uitofp i8 %x to float
  %ret = call float @llvm.exp2.f32(float %conv)
  ret float %ret
}