llvm/test/Transforms/IndVarSimplify/pr30806-phi-scev.ll

; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 2
; RUN: opt -S -passes=indvars < %s | FileCheck %s

; Produced from the test-case:
;
; extern void foo(char *, unsigned , unsigned *);
; extern void bar(int *, long);
; extern char *processBuf(char *);
;
; extern unsigned theSize;
;
; void foo(char *buf, unsigned denominator, unsigned *flag) {
;   int incr = (int) (theSize / denominator);
;   int inx = 0;
;   while (*flag) {
;     int itmp = inx + incr;
;     int i = (int) theSize;
;     bar(&i, (long) itmp);
;     buf = processBuf(buf);
;     inx = itmp;
;   }
; }

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

@theSize = external local_unnamed_addr global i32, align 4

; Check that there are two PHIs followed by a 'sext' in the same block, and that
; the test does not crash.
define void @foo(ptr %buf, i32 %denominator, ptr %flag) local_unnamed_addr {
; CHECK-LABEL: define void @foo
; CHECK-SAME: (ptr [[BUF:%.*]], i32 [[DENOMINATOR:%.*]], ptr [[FLAG:%.*]]) local_unnamed_addr {
; CHECK-NEXT:  entry:
; CHECK-NEXT:    [[I:%.*]] = alloca i32, align 4
; CHECK-NEXT:    [[TMP0:%.*]] = load i32, ptr @theSize, align 4
; CHECK-NEXT:    [[DIV:%.*]] = udiv i32 [[TMP0]], [[DENOMINATOR]]
; CHECK-NEXT:    [[TMP1:%.*]] = load i32, ptr [[FLAG]], align 4
; CHECK-NEXT:    [[TOBOOL5:%.*]] = icmp eq i32 [[TMP1]], 0
; CHECK-NEXT:    br i1 [[TOBOOL5]], label [[WHILE_END:%.*]], label [[WHILE_BODY_LR_PH:%.*]]
; CHECK:       while.body.lr.ph:
; CHECK-NEXT:    br label [[WHILE_BODY:%.*]]
; CHECK:       while.body:
; CHECK-NEXT:    [[INDVARS_IV:%.*]] = phi i64 [ [[INDVARS_IV_NEXT:%.*]], [[WHILE_BODY]] ], [ 0, [[WHILE_BODY_LR_PH]] ]
; CHECK-NEXT:    [[BUF_ADDR_07:%.*]] = phi ptr [ [[BUF]], [[WHILE_BODY_LR_PH]] ], [ [[CALL:%.*]], [[WHILE_BODY]] ]
; CHECK-NEXT:    [[TMP2:%.*]] = sext i32 [[DIV]] to i64
; CHECK-NEXT:    [[INDVARS_IV_NEXT]] = add nsw i64 [[INDVARS_IV]], [[TMP2]]
; CHECK-NEXT:    [[TMP3:%.*]] = load i32, ptr @theSize, align 4
; CHECK-NEXT:    store i32 [[TMP3]], ptr [[I]], align 4
; CHECK-NEXT:    call void @bar(ptr nonnull [[I]], i64 [[INDVARS_IV_NEXT]])
; CHECK-NEXT:    [[CALL]] = call ptr @processBuf(ptr [[BUF_ADDR_07]])
; CHECK-NEXT:    [[TMP4:%.*]] = load i32, ptr [[FLAG]], align 4
; CHECK-NEXT:    [[TOBOOL:%.*]] = icmp eq i32 [[TMP4]], 0
; CHECK-NEXT:    br i1 [[TOBOOL]], label [[WHILE_END_LOOPEXIT:%.*]], label [[WHILE_BODY]]
; CHECK:       while.end.loopexit:
; CHECK-NEXT:    br label [[WHILE_END]]
; CHECK:       while.end:
; CHECK-NEXT:    ret void
;
entry:
  %i = alloca i32, align 4
  %0 = load i32, ptr @theSize, align 4
  %div = udiv i32 %0, %denominator
  %1 = load i32, ptr %flag, align 4
  %tobool5 = icmp eq i32 %1, 0
  br i1 %tobool5, label %while.end, label %while.body.lr.ph

while.body.lr.ph:                                 ; preds = %entry
  br label %while.body

while.body:                                       ; preds = %while.body.lr.ph, %while.body
  %buf.addr.07 = phi ptr [ %buf, %while.body.lr.ph ], [ %call, %while.body ]
  %inx.06 = phi i32 [ 0, %while.body.lr.ph ], [ %add, %while.body ]
  %add = add nsw i32 %inx.06, %div
  %2 = load i32, ptr @theSize, align 4
  store i32 %2, ptr %i, align 4
  %conv = sext i32 %add to i64
  call void @bar(ptr nonnull %i, i64 %conv)
  %call = call ptr @processBuf(ptr %buf.addr.07)
  %3 = load i32, ptr %flag, align 4
  %tobool = icmp eq i32 %3, 0
  br i1 %tobool, label %while.end.loopexit, label %while.body

while.end.loopexit:                               ; preds = %while.body
  br label %while.end

while.end:                                        ; preds = %while.end.loopexit, %entry
  ret void
}

declare void @bar(ptr, i64) local_unnamed_addr
declare ptr @processBuf(ptr) local_unnamed_addr