84 lines
2.7 KiB
LLVM
84 lines
2.7 KiB
LLVM
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; RUN: llc %s -enable-machine-outliner=never -mtriple=arm64-apple-darwin -o - | FileCheck %s --check-prefix=DARWIN
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; RUN: llc %s -enable-machine-outliner=never -mtriple=arm64-linux-gnu -o - | FileCheck %s --check-prefix=LINUX
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; <rdar://problem/14199482> ARM64: Calls to bzero() replaced with calls to memset()
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declare void @llvm.memset.p0.i64(ptr nocapture, i8, i64, i1)
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; CHECK-LABEL: fct1:
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; Constant size memset to zero.
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; DARWIN: {{b|bl}} _bzero
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; LINUX: {{b|bl}} memset
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define void @fct1(ptr nocapture %ptr) minsize {
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tail call void @llvm.memset.p0.i64(ptr %ptr, i8 0, i64 256, i1 false)
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ret void
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}
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; CHECK-LABEL: fct3:
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; Variable size memset to zero.
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; DARWIN: {{b|bl}} _bzero
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; LINUX: {{b|bl}} memset
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define void @fct3(ptr nocapture %ptr, i32 %unknown) minsize {
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%conv = sext i32 %unknown to i64
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tail call void @llvm.memset.p0.i64(ptr %ptr, i8 0, i64 %conv, i1 false)
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ret void
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}
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; CHECK-LABEL: fct4:
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; Variable size checked memset to zero.
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; DARWIN: {{b|bl}} _bzero
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; LINUX: {{b|bl}} memset
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define void @fct4(ptr %ptr) minsize {
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%tmp = tail call i64 @llvm.objectsize.i64(ptr %ptr, i1 false)
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%call = tail call ptr @__memset_chk(ptr %ptr, i32 0, i64 256, i64 %tmp)
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ret void
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}
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declare ptr @__memset_chk(ptr, i32, i64, i64)
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declare i64 @llvm.objectsize.i64(ptr, i1)
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; CHECK-LABEL: fct6:
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; Size = unknown, change.
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; DARWIN: {{b|bl}} _bzero
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; LINUX: {{b|bl}} memset
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define void @fct6(ptr %ptr, i32 %unknown) minsize {
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%conv = sext i32 %unknown to i64
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%tmp = tail call i64 @llvm.objectsize.i64(ptr %ptr, i1 false)
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%call = tail call ptr @__memset_chk(ptr %ptr, i32 0, i64 %conv, i64 %tmp)
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ret void
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}
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; Next functions check that memset is not turned into bzero
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; when the set constant is non-zero, whatever the given size.
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; CHECK-LABEL: fct7:
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; memset with something that is not a zero, no change.
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; DARWIN: {{b|bl}} _memset
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; LINUX: {{b|bl}} memset
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define void @fct7(ptr %ptr) minsize {
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%tmp = tail call i64 @llvm.objectsize.i64(ptr %ptr, i1 false)
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%call = tail call ptr @__memset_chk(ptr %ptr, i32 1, i64 256, i64 %tmp)
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ret void
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}
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; CHECK-LABEL: fct8:
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; memset with something that is not a zero, no change.
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; DARWIN: {{b|bl}} _memset
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; LINUX: {{b|bl}} memset
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define void @fct8(ptr %ptr) minsize {
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%tmp = tail call i64 @llvm.objectsize.i64(ptr %ptr, i1 false)
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%call = tail call ptr @__memset_chk(ptr %ptr, i32 1, i64 257, i64 %tmp)
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ret void
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}
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; CHECK-LABEL: fct9:
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; memset with something that is not a zero, no change.
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; DARWIN: {{b|bl}} _memset
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; LINUX: {{b|bl}} memset
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define void @fct9(ptr %ptr, i32 %unknown) minsize {
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%conv = sext i32 %unknown to i64
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%tmp = tail call i64 @llvm.objectsize.i64(ptr %ptr, i1 false)
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%call = tail call ptr @__memset_chk(ptr %ptr, i32 1, i64 %conv, i64 %tmp)
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ret void
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}
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