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150
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1 ; RUN: opt -codegenprepare -disable-cgp-branch-opts -S < %s | FileCheck %s
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2 target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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3 target triple = "x86_64-unknown-linux-gnu"
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4
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5 ; The first cast should be sunk into block2, in order that the
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6 ; instruction selector can form an efficient
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7 ; i64 * i64 -> i128 multiplication.
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8 define i128 @sink(i64* %mem1, i64* %mem2) {
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9 ; CHECK-LABEL: block1:
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10 ; CHECK-NEXT: load
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11 block1:
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12 %l1 = load i64, i64* %mem1
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13 %s1 = sext i64 %l1 to i128
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14 br label %block2
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15
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16 ; CHECK-NEXT: sext
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17 ; CHECK-NEXT: load
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18 ; CHECK-NEXT: sext
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19 block2:
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20 %l2 = load i64, i64* %mem2
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21 %s2 = sext i64 %l2 to i128
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22 %res = mul i128 %s1, %s2
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23 ret i128 %res
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24 }
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25
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26 ; The first cast should be hoisted into block1, in order that the
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27 ; instruction selector can form an extend-load.
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28 define i64 @hoist(i32* %mem1, i32* %mem2) {
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29 ; CHECK-LABEL: block1:
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30 ; CHECK-NEXT: load
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31 ; CHECK-NEXT: sext
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32 block1:
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33 %l1 = load i32, i32* %mem1
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34 br label %block2
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35
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36 ; CHECK-NEXT: load
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37 ; CHECK-NEXT: sext
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38 block2:
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39 %s1 = sext i32 %l1 to i64
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40 %l2 = load i32, i32* %mem2
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41 %s2 = sext i32 %l2 to i64
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42 %res = mul i64 %s1, %s2
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43 ret i64 %res
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44 }
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45
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46 ; Make sure the cast sink logic and OptimizeExtUses don't end up in an infinite
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47 ; loop.
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48 define i128 @use_ext_source() {
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49 block1:
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50 %v1 = or i64 undef, undef
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51 %v2 = zext i64 %v1 to i128
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52 br i1 undef, label %block2, label %block3
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53
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54 block2:
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55 %v3 = add i64 %v1, 1
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56 %v4 = zext i64 %v3 to i128
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57 br label %block3
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58
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59 block3:
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60 %res = phi i128 [ %v2, %block1 ], [ %v4, %block2 ]
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61 ret i128 %res
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62 }
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