21f23a37c6
memcpy has clamped dst stack alignment to NaturalStackAlignment if hasStackRealignment is false. We should also clamp stack alignment for memset and memmove. If we don't clamp, SelectionDAG may first do tail call optimization which requires no stack realignment. Then memmove, memset in same function may be lowered to load/store with larger alignment leading to PEI emit stack realignment code which is absolutely not correct. Reviewed By: LuoYuanke Differential Revision: https://reviews.llvm.org/D136456
95 lines
3.0 KiB
LLVM
95 lines
3.0 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -mcpu=pentium2 -mtriple=i686-apple-darwin8.8.0 | FileCheck %s --check-prefix=X86
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; RUN: llc < %s -mcpu=pentium3 -mtriple=i686-apple-darwin8.8.0 | FileCheck %s --check-prefix=XMM
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; RUN: llc < %s -mcpu=bdver1 -mtriple=i686-apple-darwin8.8.0 | FileCheck %s --check-prefix=YMM
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%struct.x = type { i16, i16 }
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define void @t() nounwind {
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; X86-LABEL: t:
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; X86: ## %bb.0: ## %entry
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; X86-NEXT: subl $44, %esp
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; X86-NEXT: movl $0, {{[0-9]+}}(%esp)
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; X86-NEXT: movl $0, {{[0-9]+}}(%esp)
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; X86-NEXT: movl $0, {{[0-9]+}}(%esp)
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; X86-NEXT: movl $0, {{[0-9]+}}(%esp)
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; X86-NEXT: movl $0, {{[0-9]+}}(%esp)
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; X86-NEXT: movl $0, {{[0-9]+}}(%esp)
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; X86-NEXT: movl $0, {{[0-9]+}}(%esp)
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; X86-NEXT: movl $0, {{[0-9]+}}(%esp)
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; X86-NEXT: leal {{[0-9]+}}(%esp), %eax
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; X86-NEXT: movl %eax, (%esp)
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; X86-NEXT: calll _foo
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; X86-NEXT: addl $44, %esp
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; X86-NEXT: retl
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;
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; XMM-LABEL: t:
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; XMM: ## %bb.0: ## %entry
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; XMM-NEXT: subl $60, %esp
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; XMM-NEXT: xorps %xmm0, %xmm0
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; XMM-NEXT: movaps %xmm0, {{[0-9]+}}(%esp)
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; XMM-NEXT: movaps %xmm0, {{[0-9]+}}(%esp)
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; XMM-NEXT: leal {{[0-9]+}}(%esp), %eax
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; XMM-NEXT: movl %eax, (%esp)
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; XMM-NEXT: calll _foo
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; XMM-NEXT: addl $60, %esp
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; XMM-NEXT: retl
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;
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; YMM-LABEL: t:
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; YMM: ## %bb.0: ## %entry
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; YMM-NEXT: subl $60, %esp
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; YMM-NEXT: leal {{[0-9]+}}(%esp), %eax
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; YMM-NEXT: vxorps %xmm0, %xmm0, %xmm0
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; YMM-NEXT: vmovups %ymm0, {{[0-9]+}}(%esp)
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; YMM-NEXT: movl %eax, (%esp)
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; YMM-NEXT: vzeroupper
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; YMM-NEXT: calll _foo
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; YMM-NEXT: addl $60, %esp
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; YMM-NEXT: retl
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entry:
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%up_mvd = alloca [8 x %struct.x] ; <ptr> [#uses=2]
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%up_mvd116 = getelementptr [8 x %struct.x], ptr %up_mvd, i32 0, i32 0 ; <ptr> [#uses=1]
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call void @llvm.memset.p0.i64(ptr align 8 %up_mvd, i8 0, i64 32, i1 false)
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call void @foo( ptr %up_mvd116 ) nounwind
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ret void
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}
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declare void @foo(ptr)
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declare void @llvm.memset.p0.i64(ptr nocapture, i8, i64, i1) nounwind
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; Ensure that alignment of '0' in an @llvm.memset intrinsic results in
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; unaligned loads and stores.
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define void @PR15348(ptr %a) {
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; X86-LABEL: PR15348:
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; X86: ## %bb.0:
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; X86-NEXT: movl {{[0-9]+}}(%esp), %eax
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; X86-NEXT: movb $0, 16(%eax)
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; X86-NEXT: movl $0, 12(%eax)
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; X86-NEXT: movl $0, 8(%eax)
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; X86-NEXT: movl $0, 4(%eax)
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; X86-NEXT: movl $0, (%eax)
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; X86-NEXT: retl
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;
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; XMM-LABEL: PR15348:
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; XMM: ## %bb.0:
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; XMM-NEXT: movl {{[0-9]+}}(%esp), %eax
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; XMM-NEXT: movb $0, 16(%eax)
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; XMM-NEXT: movl $0, 12(%eax)
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; XMM-NEXT: movl $0, 8(%eax)
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; XMM-NEXT: movl $0, 4(%eax)
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; XMM-NEXT: movl $0, (%eax)
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; XMM-NEXT: retl
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;
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; YMM-LABEL: PR15348:
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; YMM: ## %bb.0:
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; YMM-NEXT: movl {{[0-9]+}}(%esp), %eax
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; YMM-NEXT: vxorps %xmm0, %xmm0, %xmm0
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; YMM-NEXT: vmovups %xmm0, (%eax)
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; YMM-NEXT: movb $0, 16(%eax)
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; YMM-NEXT: retl
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call void @llvm.memset.p0.i64(ptr %a, i8 0, i64 17, i1 false)
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ret void
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}
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