derek.holloway
7502bf64a4
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41 lines
1.5 KiB
LLVM
41 lines
1.5 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py
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; RUN: opt < %s -passes=memcpyopt -S -verify-memoryssa | FileCheck %s
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target datalayout = "e-m:e-i64:64-f80:128-n8:16:32:64-S128"
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; Don't delete the memcpy in %if.then, even though it depends on an instruction
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; which will be deleted.
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define void @foo(i1 %c, ptr %d, ptr %e, ptr %f) {
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; CHECK-LABEL: @foo(
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; CHECK-NEXT: entry:
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; CHECK-NEXT: [[TMP:%.*]] = alloca [50 x i8], align 8
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; CHECK-NEXT: [[TMP1:%.*]] = getelementptr inbounds i8, ptr [[TMP]], i64 1
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; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr nonnull [[D:%.*]], i8 0, i64 10, i1 false)
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; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 8 [[TMP]], i8 0, i64 11, i1 false)
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; CHECK-NEXT: br i1 [[C:%.*]], label [[IF_THEN:%.*]], label [[EXIT:%.*]]
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; CHECK: if.then:
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; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr align 8 [[F:%.*]], i8 0, i64 11, i1 false)
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; CHECK-NEXT: br 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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%tmp = alloca [50 x i8], align 8
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%tmp1 = getelementptr inbounds i8, ptr %tmp, i64 1
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call void @llvm.memset.p0.i64(ptr nonnull %d, i8 0, i64 10, i1 false)
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store i8 0, ptr %tmp, align 8
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call void @llvm.memcpy.p0.p0.i64(ptr nonnull %tmp1, ptr nonnull %d, i64 10, i1 false)
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br i1 %c, label %if.then, label %exit
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if.then:
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call void @llvm.memcpy.p0.p0.i64(ptr align 8 %f, ptr nonnull align 8 %tmp, i64 30, i1 false)
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br label %exit
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exit:
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ret void
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}
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declare void @llvm.memcpy.p0.p0.i64(ptr, ptr, i64, i1)
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declare void @llvm.memset.p0.i64(ptr, i8, i64, i1)
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