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[IndVars] Add test for PR56242 (NFC)

This commit is contained in:
Nikita Popov 2022-06-27 14:54:03 +02:00
parent 97ed2fbc5f
commit cfb4c1a735
1 changed files with 49 additions and 0 deletions
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49
llvm/test/Transforms/IndVarSimplify/pr56242.ll Normal file
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; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
; RUN: opt -S -indvars < %s | FileCheck %s
declare void @use(i1)
define void @test(ptr %arr) {
; CHECK-LABEL: @test(
; CHECK-NEXT: entry:
; CHECK-NEXT: br label [[LOOP_HEADER:%.*]]
; CHECK: loop.header:
; CHECK-NEXT: [[IV:%.*]] = phi i64 [ [[IV_INC:%.*]], [[LOOP_LATCH:%.*]] ], [ 0, [[ENTRY:%.*]] ]
; CHECK-NEXT: [[PTR:%.*]] = getelementptr inbounds i32, ptr [[ARR:%.*]], i64 [[IV]]
; CHECK-NEXT: [[V:%.*]] = load i32, ptr [[PTR]], align 4
; CHECK-NEXT: [[CMP1:%.*]] = icmp sgt i32 [[V]], 0
; CHECK-NEXT: br i1 [[CMP1]], label [[IF:%.*]], label [[LOOP_LATCH]]
; CHECK: if:
; CHECK-NEXT: call void @use(i1 false)
; CHECK-NEXT: br label [[LOOP_LATCH]]
; CHECK: loop.latch:
; CHECK-NEXT: [[IV_INC]] = add nuw nsw i64 [[IV]], 1
; CHECK-NEXT: [[CMP:%.*]] = icmp ult i64 [[IV_INC]], 16
; CHECK-NEXT: br i1 [[CMP]], label [[LOOP_HEADER]], label [[EXIT:%.*]]
; CHECK: exit:
; CHECK-NEXT: ret void
;
entry:
br label %loop.header
loop.header:
%iv = phi i64 [ %iv.inc, %loop.latch ], [ 0, %entry ]
%prev = phi i32 [ %v, %loop.latch ], [ 0, %entry ]
%ptr = getelementptr inbounds i32, ptr %arr, i64 %iv
%v = load i32, ptr %ptr
%cmp1 = icmp sgt i32 %v, 0
br i1 %cmp1, label %if, label %loop.latch
if:
%cmp2 = icmp slt i32 %prev, 0
call void @use(i1 %cmp2)
br label %loop.latch
loop.latch:
%iv.inc = add nuw nsw i64 %iv, 1
%cmp = icmp ult i64 %iv.inc, 16
br i1 %cmp, label %loop.header, label %exit
exit:
ret void
}