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; RUN: opt -passes='hardware-loops<force-hardware-loops>' -S %s -o - | FileCheck %s --check-prefix=CHECK
; RUN: opt -passes='hardware-loops<force-hardware-loops;hardware-loop-decrement=1>' -S %s -o - | FileCheck %s --check-prefix=CHECK
; RUN: opt -passes='hardware-loops<force-hardware-loops;hardware-loop-counter-bitwidth=32>' -S %s -o - | FileCheck %s --check-prefix=CHECK
define void @while_lt(i32 %i, i32 %N, ptr nocapture %A) {
; CHECK-LABEL: @while_lt(
; CHECK-NEXT: entry:
; CHECK-NEXT: [[CMP4:%.*]] = icmp ult i32 [[I:%.*]], [[N:%.*]]
; CHECK-NEXT: br i1 [[CMP4]], label [[WHILE_BODY_PREHEADER:%.*]], label [[WHILE_END:%.*]]
; CHECK: while.body.preheader:
; CHECK-NEXT: [[TMP0:%.*]] = sub i32 [[N]], [[I]]
; CHECK-NEXT: call void @llvm.set.loop.iterations.i32(i32 [[TMP0]])
; CHECK-NEXT: br label [[WHILE_BODY:%.*]]
; CHECK: while.body:
; CHECK-NEXT: [[I_ADDR_05:%.*]] = phi i32 [ [[INC:%.*]], [[WHILE_BODY]] ], [ [[I]], [[WHILE_BODY_PREHEADER]] ]
; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i32, ptr [[A:%.*]], i32 [[I_ADDR_05]]
; CHECK-NEXT: store i32 [[I_ADDR_05]], ptr [[ARRAYIDX]], align 4
; CHECK-NEXT: [[INC]] = add nuw i32 [[I_ADDR_05]], 1
; CHECK-NEXT: [[TMP1:%.*]] = call i1 @llvm.loop.decrement.i32(i32 1)
; CHECK-NEXT: br i1 [[TMP1]], label [[WHILE_BODY]], label [[WHILE_END]]
; CHECK: while.end:
; CHECK-NEXT: ret void
entry:
%cmp4 = icmp ult i32 %i, %N
br i1 %cmp4, label %while.body, label %while.end
while.body:
%i.addr.05 = phi i32 [ %inc, %while.body ], [ %i, %entry ]
%arrayidx = getelementptr inbounds i32, ptr %A, i32 %i.addr.05
store i32 %i.addr.05, ptr %arrayidx, align 4
%inc = add nuw i32 %i.addr.05, 1
%exitcond = icmp eq i32 %inc, %N
br i1 %exitcond, label %while.end, label %while.body
while.end:
ret void
}
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