d41e517748
We use the term "interchangeable instructions" to refer to different operators that have the same meaning (e.g., `add x, 0` is equivalent to `mul x, 1`). Non-constant values are not supported, as they may incur high costs with little benefit. --------- Co-authored-by: Alexey Bataev <a.bataev@gmx.com>
37 lines
1.4 KiB
LLVM
37 lines
1.4 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt -mtriple=x86_64-unknown-linux-gnu -passes=slp-vectorizer -S %s | FileCheck %s
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define void @test() {
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; CHECK-LABEL: @test(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = lshr i64 0, 0
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; CHECK-NEXT: [[TMP1:%.*]] = sub i64 0, 1
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; CHECK-NEXT: [[TMP2:%.*]] = lshr i64 [[TMP1]], 0
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; CHECK-NEXT: [[UMIN120:%.*]] = call i64 @llvm.umin.i64(i64 [[TMP0]], i64 [[TMP2]])
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; CHECK-NEXT: [[TMP3:%.*]] = sub i64 0, 0
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; CHECK-NEXT: [[TMP4:%.*]] = lshr i64 [[TMP3]], 0
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; CHECK-NEXT: [[UMIN122:%.*]] = call i64 @llvm.umin.i64(i64 [[UMIN120]], i64 [[TMP4]])
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; CHECK-NEXT: [[TMP5:%.*]] = add i64 0, 1
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; CHECK-NEXT: [[TMP6:%.*]] = lshr i64 [[TMP5]], 0
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; CHECK-NEXT: [[UMIN123:%.*]] = call i64 @llvm.umin.i64(i64 [[UMIN122]], i64 [[TMP6]])
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; CHECK-NEXT: [[UMIN124:%.*]] = call i64 @llvm.umin.i64(i64 [[UMIN123]], i64 0)
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; CHECK-NEXT: ret void
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;
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entry:
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%0 = mul i64 0, 0
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%1 = lshr i64 %0, 0
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%2 = sub i64 0, 1
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%3 = lshr i64 %2, 0
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%umin120 = call i64 @llvm.umin.i64(i64 %1, i64 %3)
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%4 = sub i64 0, 0
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%5 = lshr i64 %4, 0
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%umin122 = call i64 @llvm.umin.i64(i64 %umin120, i64 %5)
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%6 = add i64 0, 1
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%7 = lshr i64 %6, 0
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%umin123 = call i64 @llvm.umin.i64(i64 %umin122, i64 %7)
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%umin124 = call i64 @llvm.umin.i64(i64 %umin123, i64 0)
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ret void
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}
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declare i64 @llvm.umin.i64(i64, i64)
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