llvm/test/Transforms/InstCombine/apint-select.ll

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

; No selects should remain.

define i41 @zext(i1 %C) {
; CHECK-LABEL: @zext(
; CHECK-NEXT:    [[V:%.*]] = zext i1 [[C:%.*]] to i41
; CHECK-NEXT:    ret i41 [[V]]
;
  %V = select i1 %C, i41 1, i41 0
  ret i41 %V
}

define i41 @sext(i1 %C) {
; CHECK-LABEL: @sext(
; CHECK-NEXT:    [[V:%.*]] = sext i1 [[C:%.*]] to i41
; CHECK-NEXT:    ret i41 [[V]]
;
  %V = select i1 %C, i41 -1, i41 0
  ret i41 %V
}

define i999 @not_zext(i1 %C) {
; CHECK-LABEL: @not_zext(
; CHECK-NEXT:    [[NOT_C:%.*]] = xor i1 [[C:%.*]], true
; CHECK-NEXT:    [[V:%.*]] = zext i1 [[NOT_C]] to i999
; CHECK-NEXT:    ret i999 [[V]]
;
  %V = select i1 %C, i999 0, i999 1
  ret i999 %V
}

define i999 @not_sext(i1 %C) {
; CHECK-LABEL: @not_sext(
; CHECK-NEXT:    [[NOT_C:%.*]] = xor i1 [[C:%.*]], true
; CHECK-NEXT:    [[V:%.*]] = sext i1 [[NOT_C]] to i999
; CHECK-NEXT:    ret i999 [[V]]
;
  %V = select i1 %C, i999 0, i999 -1
  ret i999 %V
}

; Vector selects of vector splat constants match APInt too.

define <2 x i41> @zext_vec(<2 x i1> %C) {
; CHECK-LABEL: @zext_vec(
; CHECK-NEXT:    [[V:%.*]] = zext <2 x i1> [[C:%.*]] to <2 x i41>
; CHECK-NEXT:    ret <2 x i41> [[V]]
;
  %V = select <2 x i1> %C, <2 x i41> <i41 1, i41 1>, <2 x i41> <i41 0, i41 0>
  ret <2 x i41> %V
}

define <2 x i32> @sext_vec(<2 x i1> %C) {
; CHECK-LABEL: @sext_vec(
; CHECK-NEXT:    [[V:%.*]] = sext <2 x i1> [[C:%.*]] to <2 x i32>
; CHECK-NEXT:    ret <2 x i32> [[V]]
;
  %V = select <2 x i1> %C, <2 x i32> <i32 -1, i32 -1>, <2 x i32> <i32 0, i32 0>
  ret <2 x i32> %V
}

define <2 x i999> @not_zext_vec(<2 x i1> %C) {
; CHECK-LABEL: @not_zext_vec(
; CHECK-NEXT:    [[NOT_C:%.*]] = xor <2 x i1> [[C:%.*]], <i1 true, i1 true>
; CHECK-NEXT:    [[V:%.*]] = zext <2 x i1> [[NOT_C]] to <2 x i999>
; CHECK-NEXT:    ret <2 x i999> [[V]]
;
  %V = select <2 x i1> %C, <2 x i999> <i999 0, i999 0>, <2 x i999> <i999 1, i999 1>
  ret <2 x i999> %V
}

define <2 x i64> @not_sext_vec(<2 x i1> %C) {
; CHECK-LABEL: @not_sext_vec(
; CHECK-NEXT:    [[NOT_C:%.*]] = xor <2 x i1> [[C:%.*]], <i1 true, i1 true>
; CHECK-NEXT:    [[V:%.*]] = sext <2 x i1> [[NOT_C]] to <2 x i64>
; CHECK-NEXT:    ret <2 x i64> [[V]]
;
  %V = select <2 x i1> %C, <2 x i64> <i64 0, i64 0>, <2 x i64> <i64 -1, i64 -1>
  ret <2 x i64> %V
}

; But don't touch this - we would need 3 instructions to extend and splat the scalar select condition.

define <2 x i32> @scalar_select_of_vectors(i1 %c) {
; CHECK-LABEL: @scalar_select_of_vectors(
; CHECK-NEXT:    [[V:%.*]] = select i1 [[C:%.*]], <2 x i32> <i32 1, i32 1>, <2 x i32> zeroinitializer
; CHECK-NEXT:    ret <2 x i32> [[V]]
;
  %V = select i1 %c, <2 x i32> <i32 1, i32 1>, <2 x i32> zeroinitializer
  ret <2 x i32> %V
}

;; (x <s 0) ? -1 : 0 -> ashr x, 31

define i41 @test3(i41 %X) {
; CHECK-LABEL: @test3(
; CHECK-NEXT:    [[X_LOBIT:%.*]] = ashr i41 [[X:%.*]], 40
; CHECK-NEXT:    ret i41 [[X_LOBIT]]
;
  %t = icmp slt i41 %X, 0
  %V = select i1 %t, i41 -1, i41 0
  ret i41 %V
}

;; (x <s 0) ? -1 : 0 -> ashr x, 31

define i1023 @test4(i1023 %X) {
; CHECK-LABEL: @test4(
; CHECK-NEXT:    [[X_LOBIT:%.*]] = ashr i1023 [[X:%.*]], 1022
; CHECK-NEXT:    ret i1023 [[X_LOBIT]]
;
  %t = icmp slt i1023 %X, 0
  %V = select i1 %t, i1023 -1, i1023 0
  ret i1023 %V
}