cd6f40f432
This adds an -enable-memcpyopt-memoryssa option that currently does nothing apart from requiring MSSA as a dependency. The tests are split to run both with the option disabled and enabled. I went with this rather than the separate directory DSE uses, as I found it convenient to have a direct side-by-side comparison of differences. Differential Revision: https://reviews.llvm.org/D89206
29 lines
1.2 KiB
LLVM
29 lines
1.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -memcpyopt -S -enable-memcpyopt-memoryssa=0 | FileCheck %s --check-prefixes=CHECK,NO_MSSA
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; RUN: opt < %s -memcpyopt -S -enable-memcpyopt-memoryssa=1 -verify-memoryssa | FileCheck %s --check-prefixes=CHECK,MSSA
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target datalayout = "e-m:e-i64:64-i128:128-n32:64-S128"
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define void @foo(i64* nocapture %P) {
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; CHECK-LABEL: @foo(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP0:%.*]] = bitcast i64* [[P:%.*]] to i16*
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; CHECK-NEXT: [[ARRAYIDX:%.*]] = getelementptr inbounds i16, i16* [[TMP0]], i64 1
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; CHECK-NEXT: [[TMP1:%.*]] = bitcast i16* [[ARRAYIDX]] to i32*
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; CHECK-NEXT: [[ARRAYIDX1:%.*]] = getelementptr inbounds i16, i16* [[TMP0]], i64 3
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; CHECK-NEXT: [[TMP2:%.*]] = bitcast i16* [[TMP0]] to i8*
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; CHECK-NEXT: call void @llvm.memset.p0i8.i64(i8* align 2 [[TMP2]], i8 0, i64 8, i1 false)
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; CHECK-NEXT: ret void
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;
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entry:
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%0 = bitcast i64* %P to i16*
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%arrayidx = getelementptr inbounds i16, i16* %0, i64 1
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%1 = bitcast i16* %arrayidx to i32*
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%arrayidx1 = getelementptr inbounds i16, i16* %0, i64 3
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store i16 0, i16* %0, align 2
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store i32 0, i32* %1, align 4
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store i16 0, i16* %arrayidx1, align 2
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ret void
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}
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