third_party/llvm-7.0/llvm/test/Transforms/InstCombine/load-bitcast-select.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt < %s -instcombine -S -data-layout="e-m:e-i64:64-f80:128-n8:16:32:64-S128" | FileCheck %s

@a = global [1000 x float] zeroinitializer, align 16
@b = global [1000 x float] zeroinitializer, align 16

define void @_Z3foov() {
; CHECK-LABEL: @_Z3foov(
; CHECK-NEXT:  entry:
; CHECK-NEXT:    br label [[FOR_COND:%.*]]
; CHECK:       for.cond:
; CHECK-NEXT:    [[I_0:%.*]] = phi i32 [ 0, [[ENTRY:%.*]] ], [ [[INC:%.*]], [[FOR_BODY:%.*]] ]
; CHECK-NEXT:    [[CMP:%.*]] = icmp ult i32 [[I_0]], 1000
; CHECK-NEXT:    br i1 [[CMP]], label [[FOR_BODY]], label [[FOR_COND_CLEANUP:%.*]]
; CHECK:       for.cond.cleanup:
; CHECK-NEXT:    ret void
; CHECK:       for.body:
; CHECK-NEXT:    [[TMP0:%.*]] = zext i32 [[I_0]] to i64
; CHECK-NEXT:    [[ARRAYIDX:%.*]] = getelementptr inbounds [1000 x float], [1000 x float]* @a, i64 0, i64 [[TMP0]]
; CHECK-NEXT:    [[ARRAYIDX2:%.*]] = getelementptr inbounds [1000 x float], [1000 x float]* @b, i64 0, i64 [[TMP0]]
; CHECK-NEXT:    [[TMP1:%.*]] = load float, float* [[ARRAYIDX]], align 4
; CHECK-NEXT:    [[TMP2:%.*]] = load float, float* [[ARRAYIDX2]], align 4
; CHECK-NEXT:    [[CMP_I:%.*]] = fcmp fast olt float [[TMP1]], [[TMP2]]
; CHECK-NEXT:    [[TMP3:%.*]] = select i1 [[CMP_I]], float [[TMP2]], float [[TMP1]]
; CHECK-NEXT:    store float [[TMP3]], float* [[ARRAYIDX]], align 4
; CHECK-NEXT:    [[INC]] = add nuw nsw i32 [[I_0]], 1
; CHECK-NEXT:    br label [[FOR_COND]]
;
entry:
  br label %for.cond

for.cond:                                         ; preds = %for.body, %entry
  %i.0 = phi i32 [ 0, %entry ], [ %inc, %for.body ]
  %cmp = icmp ult i32 %i.0, 1000
  br i1 %cmp, label %for.body, label %for.cond.cleanup

for.cond.cleanup:                                 ; preds = %for.cond
  ret void

for.body:                                         ; preds = %for.cond
  %0 = zext i32 %i.0 to i64
  %arrayidx = getelementptr inbounds [1000 x float], [1000 x float]* @a, i64 0, i64 %0
  %arrayidx2 = getelementptr inbounds [1000 x float], [1000 x float]* @b, i64 0, i64 %0
  %1 = load float, float* %arrayidx, align 4
  %2 = load float, float* %arrayidx2, align 4
  %cmp.i = fcmp fast olt float %1, %2
  %__b.__a.i = select i1 %cmp.i, float* %arrayidx2, float* %arrayidx
  %3 = bitcast float* %__b.__a.i to i32*
  %4 = load i32, i32* %3, align 4
  %5 = bitcast float* %arrayidx to i32*
  store i32 %4, i32* %5, align 4
  %inc = add nuw nsw i32 %i.0, 1
  br label %for.cond
}

define i32 @store_bitcasted_load(i1 %cond, float* dereferenceable(4) %addr1, float* dereferenceable(4) %addr2) {
; CHECK-LABEL: @store_bitcasted_load(
; CHECK-NEXT:    [[SEL:%.*]] = select i1 [[COND:%.*]], float* [[ADDR1:%.*]], float* [[ADDR2:%.*]]
; CHECK-NEXT:    [[BC1:%.*]] = bitcast float* [[SEL]] to i32*
; CHECK-NEXT:    [[LD:%.*]] = load i32, i32* [[BC1]], align 4
; CHECK-NEXT:    ret i32 [[LD]]
;
  %sel = select i1 %cond, float* %addr1, float* %addr2
  %bc1 = bitcast float* %sel to i32*
  %ld = load i32, i32* %bc1
  ret i32 %ld
}

define void @bitcasted_store(i1 %cond, float* %loadaddr1, float* %loadaddr2, float* %storeaddr) {
; CHECK-LABEL: @bitcasted_store(
; CHECK-NEXT:    [[SEL:%.*]] = select i1 [[COND:%.*]], float* [[LOADADDR1:%.*]], float* [[LOADADDR2:%.*]]
; CHECK-NEXT:    [[INT_LOAD_ADDR:%.*]] = bitcast float* [[SEL]] to i32*
; CHECK-NEXT:    [[LD:%.*]] = load i32, i32* [[INT_LOAD_ADDR]], align 4
; CHECK-NEXT:    [[INT_STORE_ADDR:%.*]] = bitcast float* [[STOREADDR:%.*]] to i32*
; CHECK-NEXT:    store i32 [[LD]], i32* [[INT_STORE_ADDR]], align 4
; CHECK-NEXT:    ret void
;
  %sel = select i1 %cond, float* %loadaddr1, float* %loadaddr2
  %int_load_addr = bitcast float* %sel to i32*
  %ld = load i32, i32* %int_load_addr
  %int_store_addr = bitcast float* %storeaddr to i32*
  store i32 %ld, i32* %int_store_addr
  ret void
}

define void @bitcasted_minmax_with_select_of_pointers(float* %loadaddr1, float* %loadaddr2, float* %storeaddr) {
; CHECK-LABEL: @bitcasted_minmax_with_select_of_pointers(
; CHECK-NEXT:    [[LD1:%.*]] = load float, float* [[LOADADDR1:%.*]], align 4
; CHECK-NEXT:    [[LD2:%.*]] = load float, float* [[LOADADDR2:%.*]], align 4
; CHECK-NEXT:    [[COND:%.*]] = fcmp ogt float [[LD1]], [[LD2]]
; CHECK-NEXT:    [[LD3:%.*]] = select i1 [[COND]], float [[LD1]], float [[LD2]]
; CHECK-NEXT:    store float [[LD3]], float* [[STOREADDR:%.*]], align 4
; CHECK-NEXT:    ret void
;
  %ld1 = load float, float* %loadaddr1, align 4
  %ld2 = load float, float* %loadaddr2, align 4
  %cond = fcmp ogt float %ld1, %ld2
  %sel = select i1 %cond, float* %loadaddr1, float* %loadaddr2
  %int_load_addr = bitcast float* %sel to i32*
  %ld = load i32, i32* %int_load_addr, align 4
  %int_store_addr = bitcast float* %storeaddr to i32*
  store i32 %ld, i32* %int_store_addr, align 4
  ret void
}