llvm/test/Transforms/InstCombine/multi-use-load-casts.ll

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

target datalayout = "e-m:e-p270:32:32-p271:32:32-p272:64:64-i64:64-f80:128-n8:16:32:64-S128"

; Positive test - all uses are identical casts.
define void @t0(i1 zeroext %c0, i1 zeroext %c1, ptr nocapture readonly %src) {
; CHECK-LABEL: @t0(
; CHECK-NEXT:  bb:
; CHECK-NEXT:    [[DATA:%.*]] = load i64, ptr [[SRC:%.*]], align 8
; CHECK-NEXT:    br i1 [[C0:%.*]], label [[BB3:%.*]], label [[BB7:%.*]]
; CHECK:       bb3:
; CHECK-NEXT:    br i1 [[C1:%.*]], label [[BB4:%.*]], label [[BB5:%.*]]
; CHECK:       bb4:
; CHECK-NEXT:    tail call void @abort()
; CHECK-NEXT:    unreachable
; CHECK:       bb5:
; CHECK-NEXT:    [[PTR0:%.*]] = inttoptr i64 [[DATA]] to ptr
; CHECK-NEXT:    tail call void @sink0(ptr [[PTR0]])
; CHECK-NEXT:    br label [[BB9:%.*]]
; CHECK:       bb7:
; CHECK-NEXT:    [[PTR1:%.*]] = inttoptr i64 [[DATA]] to ptr
; CHECK-NEXT:    tail call void @sink1(ptr [[PTR1]])
; CHECK-NEXT:    br label [[BB9]]
; CHECK:       bb9:
; CHECK-NEXT:    ret void
;
bb:
  %data = load i64, ptr %src, align 8
  br i1 %c0, label %bb3, label %bb7

bb3:
  br i1 %c1, label %bb4, label %bb5

bb4:
  tail call void @abort()
  unreachable

bb5:
  %ptr0 = inttoptr i64 %data to ptr
  tail call void @sink0(ptr %ptr0)
  br label %bb9

bb7:
  %ptr1 = inttoptr i64 %data to ptr
  tail call void @sink1(ptr %ptr1)
  br label %bb9

bb9:
  ret void
}

; Negative test - all uses are casts, but non-identical ones.
define void @n1(i1 zeroext %c0, i1 zeroext %c1, ptr nocapture readonly %src) {
; CHECK-LABEL: @n1(
; CHECK-NEXT:  bb:
; CHECK-NEXT:    [[DATA:%.*]] = load i64, ptr [[SRC:%.*]], align 8
; CHECK-NEXT:    br i1 [[C0:%.*]], label [[BB3:%.*]], label [[BB7:%.*]]
; CHECK:       bb3:
; CHECK-NEXT:    br i1 [[C1:%.*]], label [[BB4:%.*]], label [[BB5:%.*]]
; CHECK:       bb4:
; CHECK-NEXT:    tail call void @abort()
; CHECK-NEXT:    unreachable
; CHECK:       bb5:
; CHECK-NEXT:    [[PTR0:%.*]] = inttoptr i64 [[DATA]] to ptr
; CHECK-NEXT:    tail call void @sink0(ptr [[PTR0]])
; CHECK-NEXT:    br label [[BB9:%.*]]
; CHECK:       bb7:
; CHECK-NEXT:    [[VEC:%.*]] = bitcast i64 [[DATA]] to <2 x i32>
; CHECK-NEXT:    tail call void @sink2(<2 x i32> [[VEC]])
; CHECK-NEXT:    br label [[BB9]]
; CHECK:       bb9:
; CHECK-NEXT:    ret void
;
bb:
  %data = load i64, ptr %src, align 8
  br i1 %c0, label %bb3, label %bb7

bb3:
  br i1 %c1, label %bb4, label %bb5

bb4:
  tail call void @abort()
  unreachable

bb5:
  %ptr0 = inttoptr i64 %data to ptr
  tail call void @sink0(ptr %ptr0)
  br label %bb9

bb7:
  %vec = bitcast i64 %data to <2 x i32> ; different cast
  tail call void @sink2(<2 x i32> %vec)
  br label %bb9

bb9:
  ret void
}

; Negative test - have non-cast users.
define void @n2(i1 zeroext %c0, i1 zeroext %c1, ptr nocapture readonly %src) {
; CHECK-LABEL: @n2(
; CHECK-NEXT:  bb:
; CHECK-NEXT:    [[DATA:%.*]] = load i64, ptr [[SRC:%.*]], align 8
; CHECK-NEXT:    br i1 [[C0:%.*]], label [[BB3:%.*]], label [[BB7:%.*]]
; CHECK:       bb3:
; CHECK-NEXT:    br i1 [[C1:%.*]], label [[BB4:%.*]], label [[BB5:%.*]]
; CHECK:       bb4:
; CHECK-NEXT:    tail call void @abort()
; CHECK-NEXT:    unreachable
; CHECK:       bb5:
; CHECK-NEXT:    [[PTR0:%.*]] = inttoptr i64 [[DATA]] to ptr
; CHECK-NEXT:    tail call void @sink0(ptr [[PTR0]])
; CHECK-NEXT:    br label [[BB9:%.*]]
; CHECK:       bb7:
; CHECK-NEXT:    tail call void @sink3(i64 [[DATA]])
; CHECK-NEXT:    br label [[BB9]]
; CHECK:       bb9:
; CHECK-NEXT:    ret void
;
bb:
  %data = load i64, ptr %src, align 8
  br i1 %c0, label %bb3, label %bb7

bb3:
  br i1 %c1, label %bb4, label %bb5

bb4:
  tail call void @abort()
  unreachable

bb5:
  %ptr0 = inttoptr i64 %data to ptr
  tail call void @sink0(ptr %ptr0)
  br label %bb9

bb7:
  tail call void @sink3(i64 %data) ; non-cast use
  br label %bb9

bb9:
  ret void
}

declare void @abort()

declare void @sink0(ptr)

declare void @sink1(ptr)

declare void @sink2(<2 x i32>)

declare void @sink3(i64)