llvm.org GIT mirror llvm / release_70 test / Analysis / ScalarEvolution / load-with-range-metadata.ll
release_70

Tree @release_70 (Download .tar.gz)

load-with-range-metadata.ll @release_70raw · history · blame

; RUN: opt -analyze -scalar-evolution < %s | FileCheck %s

define i32 @slt_trip_count_with_range(i32 *%ptr0, i32 *%ptr1) {
; CHECK-LABEL: slt_trip_count_with_range
 entry:
  %limit = load i32, i32* %ptr0, !range !0
  br label %loop

 loop:
; CHECK: Loop %loop: max backedge-taken count is 98
  %index = phi i32 [ 0, %entry ], [ %index.inc, %loop ]
  %index.inc = add i32 %index, 1
  %continue = icmp slt i32 %index.inc, %limit
  br i1 %continue, label %loop, label %loop.exit

 loop.exit:
  ret i32 0
}

define i32 @ult_trip_count_with_range(i32 *%ptr0, i32 *%ptr1) {
; CHECK-LABEL: ult_trip_count_with_range
 entry:
  %limit = load i32, i32* %ptr0, !range !0
  br label %loop

 loop:
; CHECK: Loop %loop: max backedge-taken count is 98
  %index = phi i32 [ 0, %entry ], [ %index.inc, %loop ]
  %index.inc = add i32 %index, 1
  %continue = icmp ult i32 %index.inc, %limit
  br i1 %continue, label %loop, label %loop.exit

 loop.exit:
  ret i32 0
}

!0 = !{i32 1, i32 100}