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db78542b9d
The expansion code creates a copy to RBX before the real LCMPXCHG16B. It's possible this copy uses a register that is also used by the real LCMPXCHG16B. If we set the kill flag on the use in the copy, then we'll fail the machine verifier on the use on the LCMPXCHG16B. Differential Revision: https://reviews.llvm.org/D89151
99 lines
4.3 KiB
LLVM
99 lines
4.3 KiB
LLVM
; NOTE: Assertions have been autogenerated by utils/update_llc_test_checks.py
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; RUN: llc < %s -verify-machineinstrs -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 { i8*, i32, i32 }
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declare void @llvm.lifetime.start.p0i8(i64, i8*)
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define void @foo(%struct.TestStruct* %arg) align 2 personality i8* bitcast (i32 (...)* @__CxxFrameHandler3 to i8*) {
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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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%i2 = getelementptr inbounds %struct.TestStruct, %struct.TestStruct* %arg, i64 0, i32 0, i32 0
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%i3 = cmpxchg i128* %i2, 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 i128* %i2, 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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%i10 = bitcast %struct.SomeArrays* %i to i8*
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call void @llvm.lifetime.start.p0i8(i64 48, i8* nonnull %i10)
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call void @llvm.memset.p0i8.i64(i8* nonnull align 8 dereferenceable(48) %i10, i8 0, i64 48, i1 false)
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%i11 = bitcast %struct.SomeArrays* %i1 to i8*
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call void @llvm.lifetime.start.p0i8(i64 48, i8* nonnull %i11)
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%i12 = bitcast %struct.SomeArrays* %i1 to i8*
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call void @llvm.memset.p0i8.i64(i8* nonnull align 8 dereferenceable(48) %i12, i8 0, i64 48, i1 false)
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%i13 = invoke nonnull align 8 dereferenceable(48) %struct.SomeArrays* @"??4SomeArrays@@QEAAAEAU0@$$QEAU0@@Z"(%struct.SomeArrays* nonnull %i, %struct.SomeArrays* 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.p0i8(i64 48, i8* nonnull %i10)
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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, %struct.SomeArrays* %i1, i64 0, i32 2, i32 0
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%i48 = load i8*, i8** %i47, align 8
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invoke void @"?free@@YAXPEAX@Z"(i8* %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, %struct.SomeArrays* %i1, i64 0, i32 1, i32 0
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%i53 = load i8*, i8** %i52, align 8
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invoke void @"?free@@YAXPEAX@Z"(i8* %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.p0i8(i64 48, i8* nonnull %i10)
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cleanupret from %i46 unwind to caller
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}
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declare void @llvm.lifetime.end.p0i8(i64 immarg, i8* nocapture)
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declare void @llvm.memset.p0i8.i64(i8*, i8, i64, i1)
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declare dso_local i32 @__CxxFrameHandler3(...)
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declare nonnull align 8 dereferenceable(48) %struct.SomeArrays* @"??4SomeArrays@@QEAAAEAU0@$$QEAU0@@Z"(%struct.SomeArrays*, %struct.SomeArrays* nonnull align 8 dereferenceable(48)) align 2
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declare void @"?free@@YAXPEAX@Z"(i8*)
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declare void @__std_terminate()
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