52 lines
1.8 KiB
LLVM
52 lines
1.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
|
|
; RUN: opt -passes=indvars -S < %s | FileCheck %s
|
|
|
|
define void @infer_via_ranges(ptr %arr, i32 %n) {
|
|
; CHECK-LABEL: define void @infer_via_ranges(
|
|
; CHECK-SAME: ptr [[ARR:%.*]], i32 [[N:%.*]]) {
|
|
; CHECK-NEXT: [[ENTRY:.*:]]
|
|
; CHECK-NEXT: [[FIRST_ITR_CHECK:%.*]] = icmp sgt i32 [[N]], 0
|
|
; CHECK-NEXT: [[START:%.*]] = sub i32 [[N]], 1
|
|
; CHECK-NEXT: br i1 [[FIRST_ITR_CHECK]], label %[[LOOP_PREHEADER:.*]], label %[[EXIT:.*]]
|
|
; CHECK: [[LOOP_PREHEADER]]:
|
|
; CHECK-NEXT: br label %[[LOOP:.*]]
|
|
; CHECK: [[LOOP]]:
|
|
; CHECK-NEXT: [[IDX:%.*]] = phi i32 [ [[IDX_DEC:%.*]], %[[IN_BOUNDS:.*]] ], [ [[START]], %[[LOOP_PREHEADER]] ]
|
|
; CHECK-NEXT: [[IDX_DEC]] = sub nsw i32 [[IDX]], 1
|
|
; CHECK-NEXT: br i1 true, label %[[IN_BOUNDS]], label %[[OUT_OF_BOUNDS:.*]]
|
|
; CHECK: [[IN_BOUNDS]]:
|
|
; CHECK-NEXT: [[ADDR:%.*]] = getelementptr i32, ptr [[ARR]], i32 [[IDX]]
|
|
; CHECK-NEXT: store i32 0, ptr [[ADDR]], align 4
|
|
; CHECK-NEXT: [[NEXT:%.*]] = icmp sgt i32 [[IDX_DEC]], -1
|
|
; CHECK-NEXT: br i1 [[NEXT]], label %[[LOOP]], label %[[EXIT_LOOPEXIT:.*]]
|
|
; CHECK: [[OUT_OF_BOUNDS]]:
|
|
; CHECK-NEXT: ret void
|
|
; CHECK: [[EXIT_LOOPEXIT]]:
|
|
; CHECK-NEXT: br label %[[EXIT]]
|
|
; CHECK: [[EXIT]]:
|
|
; CHECK-NEXT: ret void
|
|
;
|
|
entry:
|
|
%first.itr.check = icmp sgt i32 %n, 0
|
|
%start = sub i32 %n, 1
|
|
br i1 %first.itr.check, label %loop, label %exit
|
|
|
|
loop:
|
|
%idx = phi i32 [ %start, %entry ] , [ %idx.dec, %in.bounds ]
|
|
%idx.dec = sub i32 %idx, 1
|
|
%abc = icmp sge i32 %idx, 0
|
|
br i1 %abc, label %in.bounds, label %out.of.bounds
|
|
|
|
in.bounds:
|
|
%addr = getelementptr i32, ptr %arr, i32 %idx
|
|
store i32 0, ptr %addr
|
|
%next = icmp sgt i32 %idx.dec, -1
|
|
br i1 %next, label %loop, label %exit
|
|
|
|
out.of.bounds:
|
|
ret void
|
|
|
|
exit:
|
|
ret void
|
|
}
|