xref: /llvm-project/llvm/test/Analysis/CostModel/AArch64/load-to-trunc.ll (revision 68c50b111d74afb9489cf97770fa917d0a1c7f77)
1; NOTE: Assertions have been autogenerated by utils/update_analyze_test_checks.py
2; Check memory cost model action for a load of an unusually sized integer
3; follow by and a trunc to a register sized integer gives a cost of 1 rather
4; than the expanded cost if it is not.
5
6; RUN: opt -passes="print<cost-model>" -cost-kind=code-size 2>&1 -disable-output -mtriple=aarch64--linux-gnu < %s | FileCheck %s --check-prefix=CHECK
7
8target datalayout = "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128"
9
10; Check that cost is 1 for unusual load to register sized load.
11define i32 @loadUnusualIntegerWithTrunc(ptr %ptr) {
12; CHECK-LABEL: 'loadUnusualIntegerWithTrunc'
13; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: %out = load i128, ptr %ptr, align 16
14; CHECK-NEXT:  Cost Model: Found an estimated cost of 0 for instruction: %trunc = trunc i128 %out to i32
15; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: ret i32 %trunc
16;
17  %out = load i128, ptr %ptr
18  %trunc = trunc i128 %out to i32
19  ret i32 %trunc
20}
21
22define i128 @loadUnusualInteger(ptr %ptr) {
23; CHECK-LABEL: 'loadUnusualInteger'
24; CHECK-NEXT:  Cost Model: Found an estimated cost of 2 for instruction: %out = load i128, ptr %ptr, align 16
25; CHECK-NEXT:  Cost Model: Found an estimated cost of 1 for instruction: ret i128 %out
26;
27  %out = load i128, ptr %ptr
28  ret i128 %out
29}
30