144bdf3eb7
The plan for the VF chosen by the legacy cost model could also contain additional simplifications that cause cost differences. Also check if it contains simplifications. Fixes https://github.com/llvm/llvm-project/issues/114860.
50 lines
1.8 KiB
LLVM
50 lines
1.8 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 5
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; RUN: opt -p loop-vectorize -S %s | FileCheck %s
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target datalayout = "e-m:e-p:64:64-i64:64-i128:128-n32:64-S128"
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target triple = "riscv64-unknown-linux-gnu"
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; Test for https://github.com/llvm/llvm-project/issues/114860.
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define void @test_invariant_cond_for_select(ptr %dst, i8 %x) #0 {
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; CHECK-LABEL: define void @test_invariant_cond_for_select(
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; CHECK-SAME: ptr [[DST:%.*]], i8 [[X:%.*]]) #[[ATTR0:[0-9]+]] {
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; CHECK-NEXT: [[ENTRY:.*]]:
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; CHECK-NEXT: br label %[[LOOP:.*]]
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; CHECK: [[LOOP]]:
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; CHECK-NEXT: [[IV:%.*]] = phi i64 [ 0, %[[ENTRY]] ], [ [[IV_NEXT:%.*]], %[[LOOP]] ]
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; CHECK-NEXT: [[C_1:%.*]] = icmp eq i8 [[X]], 0
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; CHECK-NEXT: [[C_2:%.*]] = icmp sgt i64 [[IV]], 0
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; CHECK-NEXT: [[C_2_EXT:%.*]] = zext i1 [[C_2]] to i64
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; CHECK-NEXT: [[SEL:%.*]] = select i1 [[C_1]], i64 [[C_2_EXT]], i64 0
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; CHECK-NEXT: [[SEL_TRUNC:%.*]] = trunc i64 [[SEL]] to i8
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; CHECK-NEXT: [[GEP:%.*]] = getelementptr inbounds i8, ptr [[DST]], i64 [[IV]]
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; CHECK-NEXT: store i8 [[SEL_TRUNC]], ptr [[GEP]], align 1
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; CHECK-NEXT: [[IV_NEXT]] = add i64 [[IV]], 4
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; CHECK-NEXT: [[EC:%.*]] = icmp ult i64 [[IV]], 14
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; CHECK-NEXT: br i1 [[EC]], label %[[LOOP]], label %[[EXIT:.*]]
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; CHECK: [[EXIT]]:
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; CHECK-NEXT: ret void
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;
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entry:
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br label %loop
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loop:
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%iv = phi i64 [ 0, %entry ], [ %iv.next, %loop ]
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%c.1 = icmp eq i8 %x, 0
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%c.2 = icmp sgt i64 %iv, 0
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%c.2.ext = zext i1 %c.2 to i64
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%sel = select i1 %c.1, i64 %c.2.ext, i64 0
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%sel.trunc = trunc i64 %sel to i8
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%gep = getelementptr inbounds i8, ptr %dst, i64 %iv
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store i8 %sel.trunc, ptr %gep, align 1
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%iv.next = add i64 %iv, 4
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%ec = icmp ult i64 %iv, 14
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br i1 %ec, label %loop, label %exit
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exit:
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ret void
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}
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attributes #0 = { "target-features"="+64bit,+v" }
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