llvm-for-llvmta/test/Transforms/LoopVectorize/nuw.ll

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2022-04-25 10:02:23 +02:00
; RUN: opt %s -loop-vectorize -force-vector-interleave=2 -force-vector-width=4 -S | FileCheck %s
; Fixes PR43828
define void @test(i32* %B) {
; CHECK-LABEL: @test(
; CHECK: vector.body:
; CHECK-COUNT-2: sub <4 x i32>
entry:
br label %outer_loop
outer_loop:
%local_4 = phi i32 [ 2, %entry ], [ %4, %outer_tail]
br label %inner_loop
inner_loop:
%local_2 = phi i32 [ 0, %outer_loop ], [ %1, %inner_loop ]
%local_3 = phi i32 [ -104, %outer_loop ], [ %0, %inner_loop ]
%0 = sub nuw nsw i32 %local_3, %local_4
%1 = add nuw nsw i32 %local_2, 1
%2 = icmp ugt i32 %local_2, 126
br i1 %2, label %outer_tail, label %inner_loop
outer_tail:
%3 = phi i32 [ %0, %inner_loop ]
store atomic i32 %3, i32 * %B unordered, align 8
%4 = add i32 %local_4, 1
%5 = icmp slt i32 %4, 6
br i1 %5, label %outer_loop, label %exit
exit:
ret void
}
define i32 @multi-instr(i32* noalias nocapture %A, i32* noalias nocapture %B, i32 %inc) {
; CHECK-LABEL: @multi-instr(
; CHECK: vector.body:
; CHECK-COUNT-4: add <4 x i32>
entry:
br label %loop
loop:
%iv = phi i32 [0, %entry], [%iv_inc, %loop]
%redu = phi i32 [0, %entry], [%3, %loop]
%gepa = getelementptr inbounds i32, i32* %A, i32 %iv
%gepb = getelementptr inbounds i32, i32* %B, i32 %iv
%0 = load i32, i32* %gepa
%1 = load i32, i32* %gepb
%2 = add nuw nsw i32 %redu, %0
%3 = add nuw nsw i32 %2, %1
%iv_inc = add nuw nsw i32 %iv, 1
%4 = icmp ult i32 %iv_inc, 128
br i1 %4, label %loop, label %exit
exit:
%lcssa = phi i32 [%3, %loop]
ret i32 %lcssa
}