derek.holloway
7502bf64a4
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93 lines
3.2 KiB
LLVM
93 lines
3.2 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_test_checks.py UTC_ARGS: --version 6
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; RUN: opt -S -passes='early-cse<memssa>' < %s | FileCheck %s
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target datalayout = "pe1:64:64:64:32"
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define ptr @load_from_zero_memset(ptr %p) {
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; CHECK-LABEL: define ptr @load_from_zero_memset(
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; CHECK-SAME: ptr [[P:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr [[P]], i8 0, i64 8, i1 false)
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; CHECK-NEXT: ret ptr null
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;
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entry:
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call void @llvm.memset.p0.i64(ptr %p, i8 0, i64 8, i1 false)
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%v = load ptr, ptr %p, align 8
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ret ptr %v
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}
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define ptr @load_from_nonzero_memset(ptr %p) {
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; CHECK-LABEL: define ptr @load_from_nonzero_memset(
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; CHECK-SAME: ptr [[P:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr [[P]], i8 1, i64 8, i1 false)
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; CHECK-NEXT: [[V:%.*]] = load ptr, ptr [[P]], align 8
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; CHECK-NEXT: ret ptr [[V]]
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;
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entry:
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call void @llvm.memset.p0.i64(ptr %p, i8 1, i64 8, i1 false)
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%v = load ptr, ptr %p, align 8
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ret ptr %v
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}
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define ptr @load_from_zero_memset_with_clobber(ptr %p) {
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; CHECK-LABEL: define ptr @load_from_zero_memset_with_clobber(
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; CHECK-SAME: ptr [[P:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr [[P]], i8 0, i64 8, i1 false)
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; CHECK-NEXT: call void @clobber(ptr [[P]])
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; CHECK-NEXT: [[V:%.*]] = load ptr, ptr [[P]], align 8
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; CHECK-NEXT: ret ptr [[V]]
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;
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entry:
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call void @llvm.memset.p0.i64(ptr %p, i8 0, i64 8, i1 false)
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call void @clobber(ptr %p)
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%v = load ptr, ptr %p, align 8
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ret ptr %v
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}
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define ptr @load_from_volatile_zero_memset(ptr %p) {
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; CHECK-LABEL: define ptr @load_from_volatile_zero_memset(
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; CHECK-SAME: ptr [[P:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr [[P]], i8 0, i64 8, i1 true)
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; CHECK-NEXT: [[V:%.*]] = load ptr, ptr [[P]], align 8
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; CHECK-NEXT: ret ptr [[V]]
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;
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entry:
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call void @llvm.memset.p0.i64(ptr %p, i8 0, i64 8, i1 true)
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%v = load ptr, ptr %p, align 8
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ret ptr %v
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}
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define ptr @load_from_zero_memset_unknown_length(ptr %p, i64 %n) {
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; CHECK-LABEL: define ptr @load_from_zero_memset_unknown_length(
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; CHECK-SAME: ptr [[P:%.*]], i64 [[N:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: call void @llvm.memset.p0.i64(ptr [[P]], i8 0, i64 [[N]], i1 false)
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; CHECK-NEXT: [[V:%.*]] = load ptr, ptr [[P]], align 8
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; CHECK-NEXT: ret ptr [[V]]
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;
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entry:
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call void @llvm.memset.p0.i64(ptr %p, i8 0, i64 %n, i1 false)
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%v = load ptr, ptr %p, align 8
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ret ptr %v
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}
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define ptr addrspace(1) @load_from_zero_memset_external(ptr addrspace(1) %p) {
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; CHECK-LABEL: define ptr addrspace(1) @load_from_zero_memset_external(
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; CHECK-SAME: ptr addrspace(1) [[P:%.*]]) {
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; CHECK-NEXT: [[ENTRY:.*:]]
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; CHECK-NEXT: call void @llvm.memset.p1.i64(ptr addrspace(1) [[P]], i8 0, i64 8, i1 false)
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; CHECK-NEXT: ret ptr addrspace(1) null
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;
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entry:
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call void @llvm.memset.p1.i64(ptr addrspace(1) %p, i8 0, i64 8, i1 false)
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%v = load ptr addrspace(1), ptr addrspace(1) %p, align 8
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ret ptr addrspace(1) %v
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}
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declare void @llvm.memset.p0.i64(ptr nocapture writeonly, i8, i64, i1 immarg)
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declare void @llvm.memset.p1.i64(ptr addrspace(1) nocapture writeonly, i8, i64, i1 immarg)
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declare void @clobber(ptr)
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