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
94 lines
3.8 KiB
LLVM
94 lines
3.8 KiB
LLVM
; RUN: llc < %s -verify-machineinstrs -stackrealign -mtriple=x86_64-pc-windows-msvc19.11.0 -mattr=+avx,+cx16 | FileCheck %s
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%struct.TestStruct = type { %union.Int128 }
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%union.Int128 = type { i128 }
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%struct.SomeArrays = type { %struct.SillyArray, %struct.SillyArray, %struct.SillyArray }
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%struct.SillyArray = type { ptr, i32, i32 }
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declare void @llvm.lifetime.start.p0(i64, ptr)
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define void @foo(ptr %arg) align 2 personality ptr @__CxxFrameHandler3 {
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; Check that %rbx is being used for a frame pointer
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; CHECK-LABEL: foo:
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; CHECK: movq %rsp, %rbx
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; Check that %rbx is saved and restored around both lock cmpxchg16b.
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; CHECK: movq %rbx, %r9
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; CHECK-NEXT: movabsq $1393743441367457520, %rcx # imm = 0x135792468ABCDEF0
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; CHECK-NEXT: movq %rcx, %rax
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; CHECK-NEXT: movq %rcx, %rdx
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; CHECK-NEXT: movq %rcx, %rbx
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; CHECK-NEXT: lock cmpxchg16b (%r8)
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; CHECK-NEXT: movq %r9, %rbx
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; CHECK: movq %rbx, %r9
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; CHECK-NEXT: movq %rcx, %rax
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; CHECK-NEXT: movq %rcx, %rdx
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; CHECK-NEXT: movq %rcx, %rbx
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; CHECK-NEXT: lock cmpxchg16b (%r8)
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; CHECK-NEXT: movq %r9, %rbx
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bb:
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%i = alloca %struct.SomeArrays, align 8
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%i1 = alloca %struct.SomeArrays, align 8
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%i3 = cmpxchg ptr %arg, i128 25710028567316702934644703134494809840, i128 25710028567316702934644703134494809840 seq_cst seq_cst
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%i4 = extractvalue { i128, i1 } %i3, 0
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%i5 = trunc i128 %i4 to i64
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%i6 = icmp eq i64 %i5, 0
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br i1 %i6, label %bb9, label %bb7
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bb7: ; preds = %bb
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%i8 = cmpxchg ptr %arg, i128 25710028567316702934644703134494809840, i128 25710028567316702934644703134494809840 seq_cst seq_cst
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br label %bb9
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bb9: ; preds = %bb7, %bb
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call void @llvm.lifetime.start.p0(i64 48, ptr nonnull %i)
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call void @llvm.memset.p0.i64(ptr nonnull align 8 dereferenceable(48) %i, i8 0, i64 48, i1 false)
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call void @llvm.lifetime.start.p0(i64 48, ptr nonnull %i1)
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call void @llvm.memset.p0.i64(ptr nonnull align 8 dereferenceable(48) %i1, i8 0, i64 48, i1 false)
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%i13 = invoke nonnull align 8 dereferenceable(48) ptr @"??4SomeArrays@@QEAAAEAU0@$$QEAU0@@Z"(ptr nonnull %i, ptr nonnull align 8 dereferenceable(48) %i1)
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to label %bb14 unwind label %bb45
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bb14: ; preds = %bb9
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call void @llvm.lifetime.end.p0(i64 48, ptr nonnull %i)
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ret void
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bb45: ; preds = %bb9
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%i46 = cleanuppad within none []
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%i47 = getelementptr inbounds %struct.SomeArrays, ptr %i1, i64 0, i32 2, i32 0
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%i48 = load ptr, ptr %i47, align 8
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invoke void @"?free@@YAXPEAX@Z"(ptr %i48) [ "funclet"(token %i46) ]
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to label %bb51 unwind label %bb49
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bb49: ; preds = %bb45
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%i50 = cleanuppad within %i46 []
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call void @__std_terminate() [ "funclet"(token %i50) ]
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unreachable
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bb51: ; preds = %bb45
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%i52 = getelementptr inbounds %struct.SomeArrays, ptr %i1, i64 0, i32 1, i32 0
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%i53 = load ptr, ptr %i52, align 8
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invoke void @"?free@@YAXPEAX@Z"(ptr %i53) [ "funclet"(token %i46) ]
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to label %bb56 unwind label %bb54
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bb54: ; preds = %bb51
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%i55 = cleanuppad within %i46 []
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call void @__std_terminate() [ "funclet"(token %i55) ]
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unreachable
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bb56: ; preds = %bb51
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call void @llvm.lifetime.end.p0(i64 48, ptr nonnull %i)
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cleanupret from %i46 unwind to caller
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}
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declare void @llvm.lifetime.end.p0(i64 immarg, ptr nocapture)
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declare void @llvm.memset.p0.i64(ptr, i8, i64, i1)
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declare dso_local i32 @__CxxFrameHandler3(...)
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declare nonnull align 8 dereferenceable(48) ptr @"??4SomeArrays@@QEAAAEAU0@$$QEAU0@@Z"(ptr, ptr nonnull align 8 dereferenceable(48)) align 2
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declare void @"?free@@YAXPEAX@Z"(ptr)
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declare void @__std_terminate()
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